Bank Holiday at Dungeness

I spent the weekend with my mother on the south Kent coast at Dungeness. Although not a birding trip, I still managed to get out a fair bit on each day. Some of the highlights of seawatching on Saturday and Sunday included Sooty and Balearic Shearwaters, and Black Terns. I missed out on the big passage this morning (including hundreds of Black Terns!), but in a short seawatch late morning I had a juvenile Long-tailed Skua (later found out ten had been seen throughout the morning).

The main reason I missed everything this morning is because I spent most of the time traipsing around the peninsula looking for passerines. Three Tree Pipits flew over early on, while I also had Whinchat, 6 Wheatears, 15 Willow Warblers and 50+ Yellow Wagtails. Yesterday proved a similar line-up (though lesser numbers), with 2 Tree Pipits, Whinchat and Wheatear.

The RSPB reserve was pretty quiet, although the Great White Egret was noted on Denge Marsh late morning on Sunday, when four Garganey and a couple of Little Ringed Plovers were on ARC Pit. Two Little Stints (adult & juvenile) were on ARC Pit early this morning along with a juvenile Ruff, c.20 Dunlin and a smattering of Common Sandpipers.

Throughout the weekend, up to four Yellow-legged Gulls were around the fishing boats. They sure show well here. Also had a red-ringed first-summer Herring Gull (HX4T) - a London bird.

Azorean Gull at Rainham?

During the four hours I spent at Rainham on Tuesday, I had two birds which, for all intents and purposes, may be hybrids. The first bird, an adult, was the less interesting of the two, and was what I would call a likely Lesser Black-backed x Herring Gull, similar to this bird photographed by Dominic Mitchell in late 2011 (could it perhaps even be the same?).

Adult gull, presumed hybrid Lesser Black-backed x Herring.

The second is a 3cy bird, moulting in to a third-winter plumage. Age aside, it looks remarkably like some of these claimed Azorean Gulls of recent autumn/winters (Oxon, Beds) - mantle colouration at the dark end of Yellow-legged Gull, but also too pale for Lesser Black-backed. Structurally, it felt like a Yellow-legged Gull - big and robust, long-winged, with nice and long yellowish legs. Fascinatingly, it had a broad and full black tail band, with some barring left on the uppertail - again, only just visible in the images but nevertheless significantly more than one would expect to see on a michahellis of this age. The retained secondaries (only just visible in the photos) were a dark chocolate brown, and there was also a brownish wash to some of the new lesser/median coverts. A retained tertial (maybe two, I couldn't see) was dark chocolate-brown with some pale scalloping limited to the tip.

I couldn't make out the eyering colour, but reviewing photos it appears to have some reddish tinge to it at least (although atlantis at this age don't necessarily show an obvious red eyering at this age). The iris is a very pale yellow. The head streaking is dense, creating a hooded effect. I was initially put off by how this streaking extends down the nape/neck, although looking at photos shows that this is not a problem in atlantis at this age - had it been an adult, that might have been different.

NB: have been looking at the primary pattern as closely as my (poor) images will allow; the one thing that concerns me is the pattern on p5 - see eighth photo down - although the black band is complete, it does not seem as broad as in the adults that I've seen shots of in flight. However, it looks pretty similar to the Oxfordshire adult of 2009. There also seems to be a hint of black in the outer web of p4. Unfortunately it doesn't help that the bird is in active moult and the primaries just seem to be all over the place. UPDATE: p5 doesn't seem to be out of range.

I've always been pretty sceptical about Azorean Gulls occurring in Britain - at least in the Midlands - and typically opt for the lazy hybrid option. But this bird has fuelled my interests further - this thing looks almost identical to some of the birds I saw on Corvo last October, as well as sharing plenty of similarities this thing photographed on Sao Miguel in September. It's not far off this bird from Terceira, either.

So, what now? Well, apart from muting it as a candidate Azorean Gull, I don't think you can go much further. It would be great to see photos of known hybrids (Herring x LBB or Yellow-legged x LBB), but they seem difficult to come across. All you can say is this bird shares a lot of features with Azorean Gulls of a similar age. However, it would take a braver man than me to totally rule out the possibility of a hybrid of some description.

A morning at Rainham

One of the great things about evening news shifts is that I have hours of daylight to play with in the mornings. Although it doesn't matter so much in the summer months, it is pretty crucial to me getting out birding during the winter. Anyway, I decided to spend the morning at Rainham Tip, a site I visited properly for the first time last month (after dipping the Slaty-backed Gull early in 2011). It turned out to be a productive visit, with three Caspian Gulls, 50+ Yellow-legged Gulls and a couple of medium-dark-mantled gulls, one of which very similar to these purported 'atlantis-types' that have turned up in the Midlands. I'll do a blog post on the latter, later.

I'll start with the cachinnans, of which all three were seen on the tip itself. First up was a green-ringed bird that had dropped its longest primaries, making it seem slightly more dumpy than it really was. I must admit that I can get a little perplexed when trying to age 'older' Caspian Gulls at this time of year when views aren't great, and this latest individual also confused me - particularly as it was never seen in flight. I guess this bird is a 4cy bird (going in to fourth-winter), with the greenish wash to the bill and black subterminal markings rather extensive. Sadly, it never came close enough to read the ring.

The second bird, a first-summer, appeared for all of a few seconds. I managed a record shot of it facing away, but it soon dropped out of view never to be seen again. Not the prettiest bird, it had dropped all its primaries but hadn't really moulted any scaps. Robust individual, though.

The third, appearing in time for Rich B's hour-long visit late morning, really was a fine beast - a great advert for how obvious adult Caspian Gulls can be. It was massive; both long-billed and rangey as it towered over most of the other gulls present. In active primary moult, with p7 regrowing, p8 dropped and p9+10 retained. P10 on the bird's left wing had snapped off. It spent much of its time displaying, throwing its head around and calling with wings held open. Note the yellowish legs.

And then, of course, there was the usual rabble of Yellow-legged Gulls. There are a lot of 1cy birds around at the moment; most are already well underway in their moult to first-winter plumage, although there are still the occasional younger-looking individuals. Also had around ten 2cy birds today - notable in the absence during my July visit. All others were adults/near-adults:

Blogging from Bird Fair

I can't escape gulls. Adult Yellow-legged and 2nd-s/3rd-w Mediterranean on the dam at Rutland Water prior to the first morning on the BirdGuides stand at the British Birdwatching Fair, 17th August. Lovely stuff.

Gulling in the boro'

LBBs @ Tanholt

Back in Lincs this weekend so headed over to Peterborough to check the gulls out this morning. Absolutely nothing at Dogsthorpe, with no tipping activity happening either. However, Tanholt was a different story, with at least 500 large gulls - mainly Lesser Black-backed - gobbling up detritus on the new landfill cell there. I eventually found a good place to view them, and had nine Yellow-legged Gulls (3 adults, 2nd-summer, 1st-summer and 4 juveniles). Some photos below.

Juvenile; note the presence of several moulted upper scapulars (with anchor markings) already.

Juvenile; same bird as above. A classic in every respect.

Adult (or near-adult) with Lesser Black-backed and Herring Gulls. I always find that older michahellis look much
 grottier facially than Herrings at this time of year, presumably because they moult their head feathers earlier.

Comparison of juvenile gulls: Lesser Black-backed (left), Yellow-legged (above centre) and Herring (bottom right).

In other news, I flushed a Quail on my patch this afternoon as I searched for the recent Black-necked Grebe (no sign). This is the first time I've seen a Quail without hearing it; really surprised me and burst out of the undergrowth Jack Snipe-stylee. Got great views of the facial markings, too - top stuff.

Ringed juvenile Yellow-legged Gull

In my previous posting on Sunday, I remained intentionally vague about a yellow-ringed juvenile gull seen at Rainham on Saturday. In the field, Rich and I had no qualms about identifying it as a Yellow-legged Gull, although when initial research suggested the colour and code ('H8J0') was typical of a scheme on Heligoland, Germany, we began to worry. Surely if this was a Herring, it would be right back to the drawing board for juvenile gull identification?!

German-ringed Yellow-legged Gull 'H8J0'

Close-up of the darvic; use your imagination!

Thankfully, the idea that this bird was Herring (or even Lesser Black-backed) turned out to be as far-fetched as it seemed in the field on Sunday - this bird was pulli ringed as a michahellis in a colony in central Frankfurt on May 18th. Relief all round, and no need to throw any of our present understanding (and literature) in the bin! Here's the beef:

Thanks to Rich for getting on with the detective work; unfortunately my blog looks a bit of a clone of his at present, although he is off on holiday for a few weeks and thus I might actually have something to post that he doesn't.

Summer gulling...

... had me a blast.

Great morning down at Coldharbour Lane, Rainham yesterday morning (21st). Rich B and I had originally intended to spend the morning at Cross Ness but, on waking up and hearing news that that bloody torch was in Greenwich, we diverted north of the Thames and headed east for Rainham. What a good decision that turned out to be.

Having grown up gulling in Peterborough, I'm used to larids being challenging to see and, when you finally get in a good position to look at them, you face the probability of flushing the lot as they're inevitably both wary and flighty. As I've said before, you rarely get a good view of the majority of gulls present in a session; most of the sites they frequent are private, difficult to get in to, or both. I would say that in an average session I manage to check less than 50% of the gulls, with this total particularly low in summer when vegetation hampers viewing even further.

So, what of such a rant? Well, I must say I was hugely impressed with the setup at Rainham. Having the pleasure of being able to see hundreds of gulls unobscured and at relatively close range is always great for me, but particularly so in summer. Here you get great views of the birds loafing on the Thames by the stone barges, and also good views loafing within the tip complex itself. Unsurprisingly, I was keen to get stuck in, pulling out this 2nd-summer Caspian Gull almost right away:

3cy cachinnans: note the small white mirror on retained p10 - diagnostic of the species

... and here you can see the retained third generation tail feathers.

It quickly became apparent that there were shed loads of Yellow-legged Gulls around: in the three or so hours we spent at Rainham, we estimated that we had seen at least 40. Many of these were juveniles; some were really blatant but others had us scrutinizing much more closely - experience from foreign trips to e.g. Morocco has taught us both that michahellis can be remarkably Lesser Black-backed-like, and vice versa. The rest of the birds we saw were 3cy+, with plenty of second-summers and adults although strangely, we could not find a single first-summer anywhere. This is something I've noticed in Peterborough; 2cy birds are often present throughout June and early July but slowly decrease in number, being replaced by juveniles and older birds as July progresses. Not sure why this is, but it can't all be down to inept observers!

Juveniles of argenteus (left) and michahellis (right).

Juvenile michahellis having a stretch, juvenile argenteus looking dumb.

4cy michahellis: particularly washed out bare parts on this one.

Juvenile michahellis having a drink on the Thames.

Another juv michahellis; note commenced moult in the scaps.

Pseudo-michahellis, presumably intermedius?

Rich picked out a smashing juvenile Mediterranean Gull (probably the freshest I've ever seen) while, earlier in the morning, I cottoned on to harsh 'kir-iick' of an adult Sandwich Tern as it bombed westwards upriver - had there been a breath of wind, I imagine it would have sneaked by unnoticed. We also had a few locally-ringed Herring Gulls, and a juvenile gull complete with yellow ring. Hopefully report back on this later in the week, as we're a little confused right now.

Leaving the sights and smells of Rainham behind, we headed over the Thames (via a snarled up Dartford Crossing) to Crayford. Very few gulls here, so we continued west to Cross Ness. Again, it was very quiet along the foreshore on the rising tide, with entertainment being provided by four Black-tailed Godwits and at least six Common Sandpipers. After scoring a McDonald's, it was back towards birdless West London for a sleepy afternoon in the sun.

Weekend, 16th-17th

My weekend has actually been reasonably productive. Woke up quite early on Saturday and found out the Little Bittern at Stocker's Lake had been seen again. As the site is only 16 miles from my house, I had no reason not to head over. In short, views were alright (but mainly obscured), though certainly not digiscopable during my visit. Wanting to catch the second half of the Wales rugby match, I headed home for around midday - only to hear the boys lose in injury time. Gutted! Three good performances this weekend from the home nations though; the gap is certainly closing between us and the Southern Hemisphere powerhouses.

For the afternoon, I headed over to east London meet up with Rich. Scored his two Egyptian Geese on Greenland Dock en route to his flat, then we were off to Cross Ness. This hybrid Ruddy x Common Shelduck was one of the first birds seen; it's been around a week or so now but this was the first time it has been seen on the south side of the Thames:

Otherwise the visit was dominated (as is often the case) by gull action. I picked up a first-summer Little Gull daintily picking at the water surface off the incinerator outfall, where there were also three first-summer Mediterranean Gulls floating around, each in different stages of moult.

First-summer Little Gull; just a bit of black speckling around the head.

The best of three 2cy Med Gulls.

Heading back towards the car, we picked up four Yellow-legged Gulls on the mudflats (tide way out). Three gorgeous first-summers are portrayed below; it was nice to get my eye back in with this age class after an enjoyable stint back on Peterborough's rubbish dumps last summer.

Same bird in the two shots above. Note how f*cked the coverts are, although the rest of the bird isn't much better. This individual shows off quite nicely how some 1st-s michs can be look almost reminiscent of Great Black-headed Gull - at least in the face - look at those lovely white eyelids, long bill and mask around the eye etc.

A streaky-headed (and generally mucky) 2cy. Presumably from Portugal (emphasis on presumably).

Another mucky bird with a cleaner head, but rather dark 3rd-generation feathers coming through in the mantle, and dark greater covert bar. Look how much that (and the tertials) contrast with the very clean, very white undertail and rump.

This morning, I headed back to the bittern in the hope of improved views in sunnier conditions. The bird was in view for the majority of the time I was there (07:30-10:30 or so), although almost always obscured by reeds. Saw it in flight a few times too today which was nice; it proved pretty mobile and got hacked off with the local Moorhens more than once. Best of a bad bunch of shots below.