What the hell is going on?

27 05 2015

“I’m an agent of chaos.”

– The Joker

We all have played the game consisting in trying to guess what will be the next “first-for” species to be seen in our countries and, most of the times, we all have failed. You have to wait quite long to see a longly-awaited species and, in the meanwhile, some other unexpected rarities are added to the country list.

These crazy sightings, like the French Kurdish wheatear, can be attributed just to freaky birds, while some others, like spring Collared flycatchers or Pallid harriers in the Iberian Mediterranean coast, come with strong easterlies, especially when the low pressures are placed over the Messina Strait. However, some of the most stunning influxes are hard to explain and we should probably look for answers at a worldwide scale.

This spring, the business is in the big numbers of Red-footed falcons and Icterine warblers almost all over the Iberian Peninsula, even inland, where these species are usually extremely rare. There are hundreds of them currently in Catalonia, where they are not rare but scarce (some years really scarce). This time, however, they don’t seem to follow the typical occurrence patterns. Easterly winds have not been that strong and the same species have appeared almost at the same time in both the Canary Islands and the NE Iberian coast. It seems therefore that they’ve chosen a more westerly route, probably crossing the Sahara through Mauritania and Morocco instead of the Nile valley.

El Hierro 1487

I’m sure this phenomenon has fulfilled several birder’s bar conversations but, since I’m surveying beaked whales at El Hierro (Canary Islands), I had to discuss the event with my friends through WhatsApp. Not a bad thing, since I re-read the conversation a couple of times while trying to find out what the hell is going on. Martí cleverly pointed out that both Icterine warbler and Red-footed falcon winter south of Zambia and both migrate N almost at the same time. Is it anything going on down there? And, if so, what could it be? An extremely tentative theory is an eastern galore in this southern wintering range. Keeping in mind the triangular shape of Africa, it could perfectly be that a difference of 50 km in a W-E axis in South Africa makes the difference between choosing the west of the Sahara route instead of the east.

El Hierro 1359

El Hierro 1053

I had 5 Red-footed falcons at El Hierro, maybe one of the westernmost localities they’ve reached, in what represents the second record for the island. There are dozens in the Eastern islands, together with the firsts Icterine warblers and Collared flycatchers ever found in the Canaries. Obviously not an anecdotal phenomenon, but a huge event that means something big has happened somewhere. It feels like two different phenomenon are implicated: “something” in the south of Africa that pushed them to the west and a hot haze in the Sahara that pushed them into the Atlantic Ocean.

El Hierro 1635

El Hierro 1633

Some of these birds are doing well here in the Canaries. They are busy preying on the African locusts that also came with the African haze. The grassy meadows are full of them and the falcons seem to spend the whole day catching them.

El Hierro 1020

However, some others died in Tenerife airport because they were hunting in the take-off lanes. Keeping in mind that probably several others just died in the middle of the ocean, the Red-footed falcon population could had suffered a strong decrease this spring. It would be interesting to research the causes of such a strange spring for this species and if it could be related to the western spread of some eastern species meant to be already happening.





Vocalisations vs. Appearence in a tricky Leaf warbler

29 04 2015

“If it has more than three chords, it’s Jazz”

– Lou Reed

It was a boring spring. Despite the good numbers of Pallid harrier and Great snipe registered mainly in the Northeastern Catalan coast, the best I had seen in Barcelona area was a “Mediterranean” spotted flycatcher Muscicapa s. balearica/tyrrhenica. Sadly, the bird went away without me being able to take a photo of the underwing.

belearica

Yesterday felt just like another random day: some Willow warblers, some Pied flycatchers, a sudden Redstart… nothing too exciting until I got a text from Manolo saying he had found a Yellow-browed warbler in Montjuïc mountain, right in the middle of Barcelona. The bird seemed to be ringed in one of the record shots Lucy managed to take, so we decided to come back late in the afternoon to try to take better photos. Things went actually interesting when Manolo pointed out that he had not heard it a single time giving the typical Yellow-browed call but some Hume’s-like sounds instead. The bird was not cooperative and they had only got poor views and breif vocalisations, but he already got the feeling of a grey bird.

After having seen some Yellow-broweds this spring in the Canary Islands (like the one below), I was aware of how grey they can get when worn, so we both knew we had to focus on sound recordings in order to clarify the identification of the bird.

yellow browed

There were quite a lot of birds in the area, including some nice migrants for  the patch, such as Turtle dove and Golden oriole, but after a couple of hours without relocating the bird, we were sitting in the grass, just chilling, waiting for the other to say we should leave. Suddenly, the bird called behind us, almost in the same tree Manolo had found it in the morning. This time, the call sounded just like a Hume’s leaf warbler! After some search that produced some new birds (at least 2 Western Bonelli’s warblers, either they were not there or it’s incredible how many birds do we miss despite intensive search), we located the bird and managed to take decent photos.

inor_humei1

inor_humei2

Apart from what looks like an extensively black bill, the rest of the bird looked like what I’d expect from a Yellow-browed by this time of the year: pure white wing bar in the GCs, green tones in scapulars and mantle, well-defined facial marks and a still visible 2nd wing bar in the MCs. However, we both agreed we had heard a Hume’s.

To get a sound recording suddenly turned out to be critical, so we just followed the bird with my cell phone pointing towards it, until it eventually happened. Again, as in the previous 3 times we had heard it, the call was not that of a Yellow-browed and reminded more of a Hume’s. This time, however, we had a recording for a later analyse.

sonogram inor_humei2

As can be seen in the comparison with Hume’s and Yellow-browed (taken from Xeno-canto), it definetely looks (sounds) like Hume’s. After having checked almost all the recordings in this website, I’ve not been able to find a single Yellow-browed with a decrecent end. In the other hand, and despite the high variability described for this species, all the Hume’s end with this downward inflection. To summarize the variation, the standard Yellow-browed call looks, in sonograms, like a V; the standard Hume’s looks like an upside-down W, with the angle of the first V more acute.

So, as Manolo said, “why it’s never easy?” It’s true, we never find a Pelican, we usually have to deal with shy uniform warblers and when they are a nice and barred species, there’s a conflict between call and appearence. Since our experience with Hume’s leaf warbler is low (none in my case!), comments on the bird are more than welcome. In the meanwhile, we’ll wait for the pelican.

PS: Many many thanks to Manolo for cheering up the spring 🙂





Enjoying bird counts

4 11 2014

“I’m not counting any chickens.”

– Jeff Bridges

It’s not easy to enjoy birding when you have to count >4000 wigeons and >5000 barnacle geese under bad weather conditions, but when the weather is nice and the birds seem to cooperate, our weekly resting bird count becomes a very nice birding time around Knösen. After the whole season having seen almost nothing up there, the good vibrations started a couple of weeks ago, with a Gyr falcon flying over the meadows with a prey on its claws. Sadly, despite we saw the bird landing in the western meadows, it was impossible to relocate. However, notable numbers of White-fronted goose and Bewick’s swans were present, together with scattered Brent goose and Rough-legged buzzards.

albifrons

bernicla

The week after, when it was time to count again, our expectations were much higher than usual. Encouraged by the previous week birds and the good visible migration early in the morning, we departed ready to actually enjoy the birding. When I think about “the attraction law”, I remove the magic component some people keenly adds and turn it into something empirical: when you are in a good mood, you find more interesting birds. This was probably what happened that day  from the beginning. Probably due to this excitement, our first stop was to check a flock of Jackdaws (yes, Jackdaws). Instead of our desired Daurian, we saw an interesting bird with a strikingly white a broad white collar and a light grey nape.

russian jackdaw2

 

My only contact with soemmerringii was in Turkey, already some years ago, and, to be honest, I don’t remember how did the underparts look like. However, it’s quite easy to find photos of Russian (here) or Turkish (here) birds with such pale and mottled underparts and after a quick check of photos of birds breeding in the Iberian Peninsula showing pale and mottled underparts strongly contrasting with the black wings (here and here), I don’t think this feature (described, for instance, in Offerein’s Dutch Birding paper) is as useful as it seemed. The collar, in the other hand, strikes me as being missing in the spermologus I’m used to, but of course present to some extent in nominate monedula. If we, therefore, are left with collar size and shape to tell them apart, what’s the minimum size for a nominate to become spermologus? What’s the maximum size to become soemmerringii?

russian jackdaw

As usual in this kind of widespread taxa, while trying to dig into the subject, we end up hitting a wall in the shape of an east-west gradient and the conclusion usually is that only the extremes can be safely identified. However, when facing  a bird that is obviously not local, we can still try to guess the origine, looking for photos that allow us to draw the boundaries of the its kind’s range. After a [too] exhaustive search in the web, my conclusion is that this bird came from Western Russia, what Offerein calls “western soemmerringii“. Swedish breeding birds don’t show the broad white collar and Turkish soemmerringii seem to be darker in the underparts. I’ve not been able to find a photo of a Romanian bird (meant to be integrade) that striking, despite the variation covered in Chris Gibbins post. Interestingly, the bird was in a flock with two nominate monedula that are probably in the extreme of the species, not usual in Falsterbo breeding birds neither.

intermediates

Since these taxa are meant to be migratory, what are the wintering grounds? According to Giroud, they are wintering in notable numbers in France and there are evidences of them wintering also in Italy, so they must be overlooked in the Iberian Peninsula. Definetely something to look at!

After an interesting bird (the kind of stuff that makes you read what’s been published as soon as you arrive home), it was nice to see something a bit more cracking. This was an adult Red-breasted goose among thousands of Barnacles. The bird was still present yesterday, when we managed to get even better views.

ruficollis2

The species is surprisingly criptic among Barnacles, especially in dark ligth conditions, but still one of the most beautiful wildfowl of our region.

ruficollis

 

The icing on the cake was the counting from the tip of Knösen. A flock of 70 scaups, more than 100 goldeneyes and dozens of Bewick’s swans together with thousands of wigeons. The sound of the birds without any wind at all, rather than the picture, was unforgettable.

 





Goldcrest + Siberian bonanza

14 10 2014

“Even in Siberia there is happiness.”

– Anton Chekhov

Huge numbers of birds are right now migrating over Falsterbo, some of them landing in both our garden and the Lighthouse garden for the delight of the ringers and the impressive number of birders around. Despite the cloudy days, everytime we look up, there’s flocks of geese, cranes, wood pigeons or common buzzards facing south or going back north in case bad wheather conditions makes the Öresund strait look like an impassable barrier.

cranes

pigeons

But not only the big birds are on the move. Passerine’ migration is also at its peak and so hundreds of thousands of finches, tits, larks and thrushes are filling the sky with an incessant flight call concert. Good training for our ears, since among the Common crossbills one can already spot some Parrot and among the Reed buntings, some Lapland buntings are also passing through. The ringing is being great, almost too much! Last saturday we ringed 2531 birds. Now that I’m writting it, it sounds just like a number, but all those birds went with a ring after having been aged and sexed. Most of them (1853) were goldcrests. We are having a very good goldcrest season, already the 6th best ever and there’s thousands everywhere in the Peninsula. These wickey beauties are foraging in trees, bushes and even on the ground. While ringing our goldcrest number 1100 (around) of the day, Kaj asked me “can you imagine how many spiders are eaten in these days in the Lighthouse garden?” I’m tempted to answer “all of them”.

regulus

regulus2

But let’s start talking about the good stuff, but let’s leave the best for the end. The list of scarcities we’ve caught these days it’s quite nice. It was mainly the Swedish gang who got excited by the Firecrests, but it’s impossible not to be aware that they actually are nice birds. This adult male represented the record bird for an autumn season at the Lighthouse garden.

firecrest

Both the Swedish and the foreigners enjoyed an adult male Ring ouzel, the first of the nominate race I handle and the second to be ringed this season (two busy with goldcrests to enjoy the first one on Saturday).

torquatus

torquatus2

And it was mainly the SW ringers celebrating this kind of late adult female Red-breasted flycatcher, also a season record bird.

parva

And coming from Siberia straight to Flommen reedbed, a couple of Yellow-browed warblers that cheered us up in the last days of another hard-work Flommen season. What looked promising in the beginning with plenty of both Marsh and Reed warblers, ended up being a season with more than one thousand birds below the average. We should be worried about the current status of Reed warbler…

inornatus2

inornatus

Goldcrests are called kingbirds in several languages (for instance, Kungsfågel in Swedish, Reietó [little king] in Catalan) so with them it came the king of the kings: a 1stW Pallas’s Leaf warbler!

proregulus

And last but not least, the actual crackerjack of the season (so far): this 1stW Radde’s warbler. It was the third to be caught in Falsterbo and a lifer for me. When Carro came into the ringing hut with a Phyllos on her hands and ask me to look at the bird I had expected just a chiffchaff (since she knows I like them…) but then I saw a bird with strikingly huge legs and head, apart from everything else. I should had checked first the smile on her face.

raddes

 

It’s only 14th of October… a lot more to come!





The Band-rumped puzzle

22 09 2014

“The real voyage of discovery consists not in seeking new landscapes, but in having new eyes.”

 – Marcel Proust

The concept “cryptic species” is interesting and worrying at the same time. It’s quite scary to think we are overlooking some rare taxa among the common stuff. But… are all these cryptic species actually unidentifiable? Some papers have already dealt with the Band-rumped storm-petrel complex identification and there seems to be some features noticeable in the field, especially with good photos.

Since it’s one of the commonest species seen in all the Lanzarote Pelagics expeditions to La Concepción Bank and I’ve just led 3 of these expeditions together with Juan Sagardía, I took the chance to take a proper look at the subject and put some light on the contradictions existing between different authors, especially when it comes to distribution of winter and summer breeders and to both structural and coloration features. Of course there will be always some tricky birds, but I hope this post can be useful for people birding in the Macaronesia and for the brave ones joining us on next year’s expeditions.

bill shape grants

Grant’s storm-petrel (winter breeders) are just arriving to the Canary Islands after having spent the summer in the other side of the Atlantic. Both adult and 2cy birds might show fresh flight feathers since they’ve just moulted them during late spring, but, since 2cy are meant to moult earlier, their primaries should be worner than those of adults. Actually, we usually see two types of birds: some showing a higher level of contrast between primaries and secondaries and some others showing an evenly jet black flight feathers. Secondaries should be always somewhat newer than primaries since they are moulted later, but the difference in the wear between primaries and secondaries is sometimes too high to be explained by a natural moult timing. Moreover, we see some birds here in the Canaries that are actively moulting secondaries, what demonstrates they can suspend the moult after having moulted the primaries. The bird below is an example of a suspended moult, but surprisingly it’s between P5 and P6. If this bird is gonna finish the moult or not it’s still a mystery, but if it doesn’t, it could lead to a very strange looking bird on its next cycle. In conclusion, the contrast could be due to an earlier moult of primaries (that of a 2cy bird) or a suspension in the moult before pre-breeding migration. So, how can we age them? Worn primaries (never as worn as in a summer breeder by this time of the year) might be indicative of 2cy but a high contrast between secondaries and primaries might indicate just a suspension. A proper assessment of primary’ wear and shape is essential for an accurate aging.

suspension primaries

One of the still unanswered questions about Band-rumps is why we see that many worn birds (that should be summer breeders) in La Concepción Bank if they are meant to be much scarcer than the fresh winter breeders. I confess I was identifying all the worn birds as summer breeders, but nowadays I actually think some of the worn birds we see are just 2cy winter breeders with an earlier primary moult. However, when you think you’ve found the answer, some new questions do emerge: some of this “worn” winter breeders (like the bird below) do suspend the moult before starting with the secondaries, what makes no sense if primary moult takes place earlier. The primaries in the bird below are older than the secondaries, but they are still broad and black, definitely not as worn as they should be in a summer breeder. In my opinion, this individual could be an example of 2cy Grant’s, with a really thick bill and a plain upperwing impression supporting this id.

cf adult madeiran

More questions: Then, how does a summer breeder look like right now? Birds moulting primaries right now should be all summer-breeders and the age would depend on the number of the primaries moulted. As happens in Grant’s, 2cy birds moult earlier so they should be now really advanced in their moult, like the bird in the top below (only 3 old primaries, p7 growing). In the other hand, adults have just started or are about to with the primaries. The birds we’ve seen during this week in La Concepción Bank were moulting p1-p3 (bottom below). In addition, secondaries in these birds will be always newer than primaries (as happens also in Grant’s), but worner than in the winter breeders that have just moulted them. It’s worth to keep in mind that the secondaries in a summer breeder are right now several months old.

Lanzarote 2274

adult summerbreeder

Apart from moult timing, some authors describe a difference in the extension and coloration of the white rump band, being narrower and somewhat dirtier in summer breeders. The silvery band in the GCs is also meant to be less extensive and contrasted in Grant’s (winter breeder), not reaching neither the elbow nor inner secondaries. Structural differences include a thicker bill and an overall bigger size in Grant’s. The bird below shows a perfect combination of features for being safely identified as Grant’s: thick bill, broad clean white rump band, plainer impression of the upperwing, heavy structure and fresh flight feathers.

moult grants

This bird lacks the GCs that should be grown soon. The upperwing band looks therefore restricted to the inner secondaries. Note how bright and black flight feathers are, indicating a late bird in terms of moult.

growing GCs

Some birds show yet another contrast between body and head feathers. When this happens, the head is usually blacker than the belly. The reason could be either an earlier moult of belly feathers leading to a worner brown area or a late moult (not yet moulted) of belly feathers. What comes first? Head or body? Two facts make me think head is moulted earlier and hence birds showing a worn brown underparts still need to moult this area: some birds show a newer head than body and some birds are uniformly jet black, but I’ve never seen a bird in September with the head browner than the body. In my opinion, this means they moult the head first (if you see them by then the head is much blacker than the rest of the body) and then, not a lot of time later, the rest of the body (what gives them the jet black appearance). The bird below shows such a contrast. It would be interesting to catch it in order to check if it’s actively moulting body feathers or if it just suspended the moult after the head.

band rumped moulted head

Moreover, I have the feeling that birds with a contrasting blacker head are commoner in August, whereas wholly jet black birds are really abundant now in September. The bird below also shows a very nice combination of Grant’s features after a complete renewal of both body and flight feathers: note how nicely evenly black the whole plumage is. Thick bill and less-contrasted upperwing band also supports the identification of it as a winter breeder. However, note the mottled rump, in my opinion more usual in winter breeders than previously described.

jet black grants

jet black grants under

 

Yet another winter breeder bird showing even a more extensive dark marking in the rump, almost approaching Leach’s. This kind of rump it’s been reported also in Monteiro’s, as this bird in Richard Bonser’s blog.

stripe dividing rump

 

Another feature meant to be unusual in Grant’s and typical of summer breeders (especially Monteiro’s storm-petrel) is the forked tail. However, it seems to be quite common also among winter breeders. The bird below is a classic Grant’s in every respect but shows a surprisingly deep fork in the tail. This bird also shows a classic Grant’s plumage in terms of color and wear (note for instance the upperwing band not reaching the elbow) but a mottled rump and a forked tail.

frok tailed grants

And yet an even trickier bird: even deeper fork in the tail and much more extensive and contrasted upperwing bar. Although hard to judge because of the position, the bill also looks thinner… The whole plumage is completely new so the only option of it being a Monteiro’s would be a 1cy recently fledged. Sadly, chicks don’t fly until October and moreover, for such a young 1cy, I would expect the usual extremely new white tips in primaries and secondaries. Hence, I stand with a winter breeder showing Monteiro’s characters.

frok tailed grants2

Finally, [Caution: what follows it’s a complete mindtrapp!] this bird with a really deep fork in the tail, a thin bill and a worn plumage (just starting post-breeding moult by inner primaries). Everything fits with a Monteiro’s and I don’t think anybody can say it’s not for other reasons but the range and the abundance.

monteiros like

A deeper analyse of the subject would appear in the forthcoming Macaronesian Birds magazine. More news on that soon!





Let’s talk about Godwits

19 08 2014

 “In practical life we are compelled to follow what is most probable ; in speculative thought we are compelled to follow truth.”

– Baruch Spinoza

WARNING! The following post is highly speculative. If you consider yourself a pure scientist, do not read it.

After several days with constant showers and strong westerlies (= no ringing), I’ve got plenty of time to read random papers. It’s actually a completely different activity than reading papers “at work”; if you are not interested in what you are reading, you just leave it and go for another one. What usually happens is that you start reading about migration and end up with evolutionary ecology. Coincidence? I don’t think so.

This week, however, it was the oposite for me. I came across a couple of papers about niche filling, diversification and stability (Stigall 2014 and Price et al 2014) and they were the starting signal of what led me to read about Bar-tailed godwit migration. Since the same weather that forces me to read also forces the godwits to stop in the Peninsula, when the rain gave a break I went to Nabben to enjoy big numbers of them in beautiful summer plumage. Sometimes theory plus field observations equals conclusions and, since here in my blog I’m allowed to be especulative, let’s theorize about Nabben’s Bar-tailed godwits.

lapponicas

The first flock I saw was peacefully feeding in the [for once in a lifetime] quiet golf course and what stroke me in the beginning was the overall size difference between the brighter summer-plumaged and the grey winter-plumaged individuals, the latter being bigger. Differences were especially noticeable in bill lenght and depth. As usual in waders, females have a longer and deeper bill and are duller in plumage, so in the photo below there is 1 female and 4 males.  The whole flock was made out of 12 males and 2 females. What’s the reason for such a biased sex-ratio? According to BWP (Cramp et al. 1983), there is not a big difference in parental care in Bar-tailed godwit, so both male and female stay with the youngsters until they fledge. Hence, there shouldn’t be a sex-related difference in departure dates. The reason might have something to do with their feeding ecology and subsequent sexual segregation. Several studies (e.g. Both et al. 2003, Catry et al. 2012) have pointed out a difference in foraging habitat due to larger food requirements in females (because of their bigger size) and they are the ones choosing the place. Seemingly, females usually forage along the rich waterline, whereas males have to get along with exposed mudflats and grassy meadows. A golf course is probably not the best place to find food so it’s not that surprising that that flock was mainly made out of males.

female plus for males

Let’s focus on males for a while. Their bill is more curved than that on females, and impression accentuated by its shorter lenght. Ferns & Siman 1994 studied feeding techniques and resources and related them to bill shape and found that curved bills were useful to get food from cavities and confined spaces. Makes sense! Males are feeding in poorer habitats and have a stronger need to actually look for food instead of just find it as females do in richer areas with their straighter bill. Moreover, there was a difference in bill shape even within males. I’ve tried to sort the different kinds of bill I saw in males in the crappily made collage below. In the top, bills that looked almost straight; in the middle, bills that looked straight but curved in the end; in the bottom, bills that looked wholly curved. I know, differences are subtle, but, quoting whatever famous documentarist “in nature, a milimiter makes the difference between life and death”. Don’t google it, I just made it up, but it sounds likely, doesn’t it?

bills

Anyway, guess what, I don’t know about the bird in the top left, but the bird in the top right showed the wornest primaries among the flock, especially the outer ones in what gave the impression of a moult limit. Moreover, and always among the males, it was the one with a duller plumage despite it didn’t show any winter body feather. So it’s my strong opinion that this bird is a 1st summmer: worner primaries (maybe fresh inner due to an earlier, before migration, moult) and duller plumage than adults. Check the difference in wear level in outer primaries in the photo below, also head and body plumage. The conclusion I temptatively get from this is that the bill gets more curved with age. It also makes sort of sense: females will be always dominant, pushing males towards a place where they need a curved bill. Lammarck would say young birds change the shape of the bill to make it fit with the habitat they are foraging in. Maybe… but a modern approach would probably say that only juveniles with curved bills reach the adult age. Good luck to our misfit friend!

primaries

Let’s now focused on putative adult males and their shinny bellies. Piersma & Jukema 1993 suggested that the brightness of the orange in summer-plumaged  Bar-tailed godwit was an honest signal in relation to migratory skills. Birds start with their pre-breeding (pre-alternate for the yanks) moult in winter quarters, they suspend it before departing and then congregate in places such as the Wadden Sea (north central Europe) to finish it. Despite moult only takes an extra 7% of energy, only the individuals in good physical condition (this is, more skillful in terms of feeding or flying performances) can afford it. The bird in the right of the photo below is obviously brighter than the other two, despite all three of them presumably belong to the same age and sex classes. I wonder if it has something to do with the mentioned study…

breast color

And now we are talking about migration, it’s worth saying that Bar-tailed godwit still holds the longest non-stop flight record: 11.500 km. from Alaska to New Zealand! Hedenström 2010 tries to answer at least some of the thousands of questions that emerge from this record, but ends up saying that not even the extremely especialized physiology of Bar-tailed godwits can explain such a success. Maybe some help from the weather? Let’s leave this questions for the next wave of rain…





Tribute to Llobregat Delta

4 04 2014

“And did you exchange a walk on part in the war for a lead role in a cage?”

Wish you were here, Pink Floyd

 

2 springs of absence, justified or not, but Llobregat Delta forgives me with a very nice migration day, concluded with an Iberian chiffchaff that was so kind as to call enough times to be recorded. Iberian chiffchaff is a local rarity, but regular enough to expect to find one with a bit of effort in the typical areas. Fortunately, one of those areas used to be my local patch, and the place where I learnt most of what I know. Thanks to Joan Castelló, I grew up as a ringer and thanks to Xavi Larruy I did so as a birder. The list of people who has already appeared in my blog is starting to be long and it was not fair that these 2 were not yet mentioned. Maybe this post, that tries to be a homage to Llobregat Delta, is a good chance to say thank you. Don’t expect neither great photos nor crazy rarities; this is gonna be how it used to be some years ago: chasing warblers through the bushes and waiting for either a crake or a Temminck’s stint to appear behind the rushes.

Yeah, it’s been an emotional morning, with several re-encountered feelings and birds. After two days of strong showers coming straight from Africa (yesterday’s rain was disgustingly sandy), the tamarinds and reedbeds along the road that follows La Vidala chanel were packed with Willow warblers, Chiffchaffs, Blackcaps, Redstarts and Robins, whereas the sky was full of Swallows, Martins and Swifts. Although the rain has increased the water level of the marshes, the number of waders was still notable, as well as the diversity of duck species.

A walk through the bushes produced some personal first for the year: Bonelli’s and Subalpine warbler, Nightingale and Common redstart. The Bonelli’s warbler is a surprisingly scarce species at Llobregat Delta, despite being extremely abundant in the nearby mountains. I decided to stay for a while to ensure the identification. Tertials looked white-edged at a glance, but GCs were just normal. The bird called (as Western) more often than migrant Bonelli’s usually do, so I carried on without looking back.

bonelli

 

Already inside La Bassa dels Pollancres observatory, two photographers argued at loud about whatever expensive camera, so most of birds were faraway. I ended up checking the swifts, since it was possible to spot some Pallid just by bare eye. There was one that glimpsed my atention. Although obviously Pallid, it got a less extensive white bib, a deeper fork in the tail and a darker background coloration, contrasting with the diagnostic pale panels in GCs.

pallidus

pallidus2

 

All in all, it reminded me to the illyricus I did see at Copenhagen museum. This subspecies is meant to breed in the Adriatic see, at least in the east coast. Maybe not so surprisingly, it stroke me as being the most distinctive subspecies among the 3 I examined at the museum, mainly due to the characters I also spotted in today’s bird. In the photo below, you can see 3 illyricus in the right and 2 brehmorum in the left. What can I say? I just don’t know…

apus pallidus

Anyway, since the two photographers carried on with their senseless argument, I decided to move to the other observatory. As usual there were more birds, and some interesting ones. The Black-tailed godwit in bright breeding plumage below attracted my atention. I’m not used to them and, honestly, for me all of them look bright enough for islandica. This one it’s not, but it’s still one of the most stunning waders of our region, isn’t it?

limosa limosa

When I first entered the hyde, one of the 2 Collared pratincoles present was sat just in front, but, after 10 minutes, it decided to fly in front of the airport tower. Everybody who’s been at Llobregat Delta knows what this is: instead of an airport surrounded by meadows and marshes, nowadays is a marshland area surrounded by an airport. Photos like the one below can be taken with several species, some of them endangered, such as Bittern or Audouin’s gull. However, birds do resist and this post wants to be an evidence of it.

glareola2

glareola

 

Time to go! My body claimed for more passerines, but first I had to take a look at the orchids, a Llobregat Delta’ must-see from February to June. Early April is time for both Dark bee Ophrys fusca and Sawfly Ophrys tenthredinifera orchids. Is a bit late for the former, so I focused on the Sawflies. It’s been already 3 years without seeing them in their climax. I wouldn’t say I’ve missed them, but yeah, it’s been nice to see them again.

ophrys tenthredinifera

What I’ve really missed during these years is Iberian chiffchaffs. Maybe because it was one of the first identification challenges I dove into or maybe just because I like chiffchaffs, but the truth is that every march and april I’m looking for one of them, no matter where I am. Today I was in the right place, but it was not until one of the last trees I checked that I found what’s been the bird of the day. Among hundreds of phyllos, I spotted a bright green-yellow chiffchaff, with brownish legs, difused cheeks and half-green/half-pale supercilium.

ibericus2

That’s usually it for finding a putative Iberian, but then you need it to call because you need to record it. Today’s bird was cooperative and I managed to record the call. I’ve not edited it since I know my Swedish readers (if they are keen enough to reach this far down) would love to hear the Serin as well.

Click here

20140404_ibericus_llobregat

In the end, 81 species in 5 hours of birding in a really small area close to Barcelona. Although I am going to Israel next friday, back to the Canaries in a month and back to Sweden in July, Llobregat Delta will always be the first place to check the sightings from.

 








%d bloggers like this: