The Two Bird Theory: November 2014

Friday, 7 November 2014

Colour-ringed Med Gull

6th November 2014 - Topsham

Most visits to the Rec of late have produced at least one Mediterranean Gull, occasionally up to four. Such numbers are pitiful compared to some Dorset sites less than 50 miles along the coast, or even North Devon - haven't yet figured out why they're so scarce on the Exe. I get the impression there's been a regular turn over of birds this autumn, sometimes one bird will hang around for a few weeks but, while numbers rarely get above 2 or 3, I think the total numbers involved could be a lot higher. Whatever, they're always a pleasure to see and doubly so when they sport a readable colour ring. No scope today so I had to do my best from photos.

Mediterranean Gull 2cy H9A4 6/11/2014 Topsham

It's a second winter (2cy) of course - just like an adult but with some black in primaries, much more obvious when flying.

Mediterranean Gull 2cy H9A4 6/11/2014 Topsham

The big question is; where did it come from? Recent (since 2008) Med Gull colour rings should indicate the country of origin by their colour and initial letter; so a red ring beginning H should in theory come from Hungary but await confirmation (now confirmed - see below).

This wasn't my only colour ring of the day, I took a couple of shots of Lesser Black-backed Gulls - interesting difference in grey tone between the adult and the 3cy - and only later noticed the yellow ring on the Black-headed Gull strolling past. The first one I'd ever noticed and I had no scope with me. The photo is far too poor to give any clue as to the code and I'm not even sure if I can work out the country.

Black-headed Gull (with Lesser Black-backed Gulls) - 6/11/2014 Topsham

Update 9/11/2014 - just received this information from the good people at the Hungarian Bird Ringing Centre: H9A4 was ringed as a pullus on 15th June 2013 at Bugyi near Budapest, Hungary. This is apparently its first subsequent sighting.

Tuesday, 4 November 2014

Otter at Topsham Rec

3rd November 2014 - Topsham

One of the things I like about birding is you never know what you're going to see. Yesterday I was at The Rec early to catch the morning low tide. A commotion of gulls over the river had me expecting a passing raptor - a Peregrine perhaps. The cause of their anxiety turned out to be an otter, leisurely heading up stream after a night's fishing.

All the usual excuses for the poor photos - bad light, high contrast etc. But only my second otter at the Rec - I tend not to visit at the right time, i.e. at night.

Otter 3/11/2014 - Topsham

Monday, 3 November 2014

Scandinavian Herring Gull, mystery gull, and a Pallid Harrier in Somerset

2nd November 2014 - Topsham

Carolyn and I took a trip to Steart in Somerset on Saturday to look over the new reserve and fortunately jammed into the long -staying Pallid Harrier; fine bird but photos rather poor so I won't dwell on that.

Meanwhile, back home I had the pleasure of finding this individual at the Rec.

Herring Gull argentatus 2/11/2014 - Topsham

The most obvious feature was the darker grey mantle compared with nearby argenteus Herring Gulls. Yellow-legged Gull was never an option due to its pink legs and heavily marked head and neck (not to mention its structure). In fact the best fit is nominate argentatus Herring Gull. Before too long the gulls all took flight and I got a good look at the primaries.

Herring Gull argentatus 2/11/2014 - Topsham

It's a 4th winter bird - a few dark spots on tail and dark marks on primary coverts - and so probably shows a little more black in the primaries than it will when fully adult (this may also explain why it's rather advanced in its moult - P10 fully grown or nearly so). Even so, it has a large mirror on P10 (the black band is broken so not far off a complete white tip), a decent mirror on P9 and very little black on P5. All consistent with both argentatus and our local argenteus but, given the darker mantle, argentatus is the best fit; certainly no need to bring out the hybrid hypothesis.

Meanwhile, here's a puzzle from Exmouth a month ago - any suggestions?

Larus sp. 6/10/2014 - Exmouth

Herring Gull in front of course, but what about the one behind? Here are a couple of flight shots.