www.gull-research.org

Scattered over several sites you'll find birds which resemble hyperboreus in some degree. But it's fun to speculate which birds could still be regarded 'argentatus at the paler end of the spectrum (apes)'. One feature that should be present in presumed hybrids is a bicoloured bill to some extent I would suggest, something not visible in the bird below, which therefore may well be an 'ape(s)'.

Pictures today at IJmuiden.

EDIT: Sorry, probably had been better added to this topic:
viewtopic.php?f=7&t=12

Today, Scheveningen, Holland. 1cy argentatus in all respects, except well defined bicoloured bill.

Today, Scheveningen. Bi-coloured bill in 1cy tatus.

In addition to Marsh Herring Gull with a bi-coloured bill and other features have a look at these Florida gulls - with comments on ID-Frontiers:

http://www.zbirdtours.com/dbs_herg.htm

Especially these three comments:

http://www.virtualbirder.com/bmail/idfr ... ex.html#16

http://www.virtualbirder.com/bmail/idfr ... ex.html#19

http://www.virtualbirder.com/bmail/idfr ... ex.html#26

Jan

Another bi-coloured bill, 4 dec Poland , but this one was much smaller than other HG.

Pale 1cy from Amsterdam 30-10-10.

Today at Westkapelle there were at least three gulls that were on the paler end of the spectrum. Three pics of the same individual, one of the nicest I've seen this year.

regards, pim

Today at Scheveningen. Excellent argentatus, except for that bill.....

And there was a herring gull close by, at the paler end...

Theo

This one looks pale to me. Or could it be something else?