Caspian Gull X574

My fourth Caspian Gull of the season (adopting Rich's 1 July - 30 June cycle) was along the River Thames at Fulham late morning on Sunday 22nd. Like several other Casps in London in recent times, it bore a German ring and originates from the famous Grabendorfer See colony, where hybridisation with Herring Gull is quite prevalent.

The ring read X574, which quickly confirmed it as the same bird seen by Jamie Partridge over at Thames Barrier Park the previous day. Ironically, while watching X574, I received a message from Jamie to say he'd got the first-winter I saw in Fulham back on 19 September! A fair swap, I'd say.

Although some of the 'Casps' from this colony can look pretty questionable, it's fair to say that X574 looks fine for a pure bird. A big and aggressive beast (presumably a male), it was very vocal and gave a full range of classic cachinnans calls, which made it very easy to pick out as it swooped in to the melee attracted to my wholemeal bread offerings.

1cy Caspian Gull X574, Fulham, London, 22 October 2017

So, as mentioned previously, my fourth Casp of the season here. Though I'm already well behind Rich, Dante and Jamie's nine (as of 23/10) in the Thames Barrier/Greenwich area, I can't ever really expect to keep up with this East London hotspot given the greater number of gulls moving up and down the Thames Estuary. However, I'd be very happy if I make it in to double figures by spring (last winter I had a total of four, although at least a couple of extras were recorded by other birders).

Also on show on Sunday were at least five Yellow-legged Gulls, a very decent tally for October given that there were 'only' about 150 large gulls present (100-200 individuals is about average here at weekends). Monday's session was nowhere near as impressive - reduced numbers included 'just' three Yellow-legged Gulls and at least one Lesser Black-backed x Herring hybrid.

1cy Yellow-legged Gulls, Fulham, 22 October 2017 - the top bird has a distinctive bill and should be easy to track around London this winter. The bottom bird is regular along 'my' stretch of the river at present.

X307 reappears in Hammersmith

While watching the Rock Thrush at Blorenge, Gwent, on Saturday morning, I was a little bit gripped to see a tweet from BTO head honcho Andy Clements that he was watching a second-winter Caspian Gull circling Hammersmith Bridge - argh! Fortunately the tides were good for an afternoon's gulling session and so Rich and Dante dropped me at Baron's Court on their was back through to east London, and I hired a bicycle to get down to the Thames. One of the first birds I looked at was a 2cy Casp, which quickly transpired to have a yellow ring. The bird's demeanour looked quite familiar, and it was no real surprise when close views revealed it to be X307.

Caspian Gull X307, Fulham, London, 14 October 2017

I've seen X307 here on one occasion previously, in late July. As can be seen in the above, X307 is a quite demure and 'cute' bird with a dainty bill and lightweight structure. So, presumably a female. Curiously, there is only a tiny hint of the 'diagnostic' p10 mirror, which is just about detectable on the left wing. Perhaps not too surprising for a bird from Germany. Plumage otherwise looks pretty good.

The odd Yellow-legged Gull was seen over the weekend, including a couple of 1cy birds and this regular near-adult.

First Caspian Gull of the season in Hammersmith

The first Caspian Gull of the season appeared on my regular Fulham/Hammersmith stretch of the Thames on Sunday evening. Tides weren't exactly ideal and with low tide well after dusk, mud was only just appearing as I arrived at 17:00 and consequently gull numbers were pretty low, with only about 50 large gulls. That didn't stop this beauty dropping in during a heavy rain shower, and it remained present until I left over an hour later, coming to my offerings and flying past within just 10 metres or so. Not being the biggest bird, it's not the most structurally outstanding Casp you'll see but plumage is pretty nice with a very pale underwing.

Unfortunately the light is never great here in the evenings as you're looking in to the sun, and changeable conditions (showers and low sun) only allowed for half-decent images.

1cy Caspian Gull, Hammersmith, 17 September 2017

Both of the regular 3cy Yellow-legged Gulls were again in residence; their respective plumages have come on quite a bit in recent weeks and one posed nicely during a calm and sunny spell.

3cy Yellow-legged Gull, Fulham, 17 September 2017

Juvenile Caspian Gull in Peterborough

It's almost inevitable that I see my first juvenile Caspian Gull of the season in Peterborough around the Birdfair weekend. Here's the 2017 offering, with a strikingly dark tail and mucky underwing but otherwise looking pretty classic.

Juvenile Caspian Gull, Dogsthorpe Tip, Peterborough, 17 August 2017

A big lump of a Yellow-legged Gull

A real bruiser of a juvenile Yellow-legged Gull at my regular gulling spot in Chiswick - comfortably the best views I've had of the species so far this summer, this beast showed no fear as it came to within just a few yards.

Juvenile Yellow-legged Gull, Chiswick, 10 August 2017

This 3cy bird is also regular in Fulham at the moment; its plumage is pretty advanced and it likes to sit on the old moorings by The Crabtree pub.

Not much to look at but ...

... gulls.

Still a steady turnover of Yellow-legged Gulls on the Thames near me, including this juvenile which obligingly flew around a few times and allowed the opportunity for some half-decent flight shots. The gulls tend to be very lazy near me at low tide, preferring to waddle rather than fly.

Juvenile Yellow-legged Gull, Fulham, 7 August 2017

G0UT remains in situ, favouring the river at low tide and then heading to the wetland centre (and presumably elsewhere too) as the water rises.

2cy Caspian Gull 'G0UT', Fulham, 7 August 2017

More gulls, I'm afraid

Unless I go to the wetland centre, the mid-summer period totally lacks in decent birding opportunities in West London. Apart from the gulls, of course.

The first juvenile Yellow-legged Gulls have started to appear. Each session on 'my' stretch of the Thames between Craven Cottage, Fulham, and Chiswick Pier produces up to five michahellis, usually always involving a different selection of birds. I've had at least three different juveniles over the past couple of weeks, although most of the birds seen have been 2cy and 3cy, with the one or two older birds thrown in for good measure.

Juvenile Yellow-legged Gull, Fulham, 23 July 2017

2cy Herring (left) and 2cy Yellow-legged Gulls, Fulham, 23 July 2017

You don't really expect to see Caspian Gulls in July but I've been fortunate enough to be blessed with two scraggy first-summers on the river near me over the past two weeks. The first was a bird I've not seen before, German-ringed 'X307' - this bird having been noted regularly in East London since it was first seen by Jamie Partridge at Thames Barrier Park on 25 September 2016 (here are a couple of nice photos of it taken by Rich in March). It's from a mixed (predominately Caspian) colony on the Polish border but to me this bird doesn't obviously stand out as a bird of mixed heritage, I thought it looked fine as a first-winter and still think the same looking at it now.

2cy Caspian Gull 'X307', Fulham, 21 July 2017

The second bird, first seen just two days after X307's appearance, was a more familiar face - 'G0UT', a Thames-ringed Casp that first visited this stretch of the Thames back in late March, a few days after it was ringed at Pitsea. Here are a few pics of it from back then. I'd say this one is a bit less impressive than X307, showing a few more hints that Herring Gull might be mixed in somewhere down the line. A few images from recent visits below, it seems pretty regular at the moment so here's hoping it hangs around here for a while.

 23 July

31 July

And a few bits of 'interest':

4cy Herring x Lesser Black-backed Gull, 29 July

Juvenile Great Black-backed Gull, 29 July. This species must breed somewhere along this stretch of the Thames - I see at least one pair of adults throughout the year and two youngsters present last week were very fresh. There are usually a few immatures hanging around as well.