Larus cachinnans

(last update: February 16, 2013)

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cachinnans in Poland

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cachinnans plumages

1cy August
1cy September
1cy October
1cy November
1cy December

2cy January
2cy February
2cy March
2cy April
2cy May
2cy June
2cy July
2cy August
2cy September
2cy October
2cy November
2cy December

3cy January
3cy February
3cy March
3cy April
3cy May
3cy June
3cy July
3cy August
3cy September
3cy October
3cy November
3cy December

sub-adult January
sub-adult February
sub-adult March
sub-adult April
sub-adult May
sub-adult June
sub-adult July
sub-adult August
sub-adult September
sub-adult October
sub-adult November
sub-adult December

adult January
adult February
adult March
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adult May
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adult August
adult September
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adult December

Larus cachinnans hybrid 3CY & 5CY PLG DN-24545 December 08 2005 & October 12 2007, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E).
Picture: Armin Deutsch.

Ringed on May 14 2003 as a chick in Wisla reservoir - Wloclawek, Poland (52°39'N, 19°08'E). Known hybrid Caspian x Herring Gull. Mother known as Caspian, father as Herring Gull.

below: cachinnans hybrid 3CY PLG DN-24545 December 08 2005, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

3W bird with large mirror on P10 and bold white tips on outer primaries. Still many immature features like black in tail, much black on bill and dark greater primary coverts.

below: cachinnans hybrid 5CY PLG DN-24545 October 12 2007, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Its similarity to Caspian is evident in the structure (longish bill) and pale bill colour; on the other hand, its pale iris, P10 pattern and moderate head-streaking are all pro-Herring Gull traits. Overall, this bird is not eye-catching. It may go unnoticed, but if detected this combination of traits should preclude identification as a pure Caspian.