torsdag 23. august 2012

Lesser Black-backed Gull: graelsii

No photos are edited. All birds are really good graelsii-candidates, and all are different individuals, if nothing else is stated... Any comments?
Kuba, Akerselva, 7.8
Langvannet, 11.8
Same as below
Langvannet, 11.8
Same as above, argentatus in background
Langvannet, 8.8
Langvannet, 1.8
Spot on neck is dirt
Langvannet, 1.8
Same as above. Bird to the right!
Langvannet, 8.8
Langvannet, 8.8
Langvannet, 1.8
Langvannet, 1.8
Really bad comparison-photo. Probable fuscus behind.
Same as above. Together with the same fuscus as above.
Really interesting with all of these graelsii-type gulls at Langvannet in the start of August. Now, late August, there are still a lot of gulls at Langvannet, but mostly 1cy. As a result, almost all the fuscus/graelsii gulls have disappeared. I have seen one fuscus (maybe a few more) and one graelsii bird since mid August.

Are the birds above migrant heading south already? And migrating through Oslo?

1 kommentar:

  1. Som alltid er det vanskelig å vurdere vingeoversidens farge. Både lysforhold, eksponering og vinkel på fuglen i forhold til lyset er viktig. Men uansett ser det for meg ut som om i alle fall 5 av bildene viser greie graellsii'er. Og kanskje kan de fleste bestemmes til denne underarten. Uansett er det overraskende at så mange lyse fugler sees i en så kort periode.

    Per

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