Larus cachinnans

(last update: February 16, 2013)

Coordinator:
Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)

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cachinnans plumages

Larus cachinnans 2CY-3CY PHLC March - April 2012 & April 2013, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Yellow PHLC and metal PLG DN-27248; ringed as pullus on May 26 2011 at Kozielno, Paczkow, S-SW Poland, (50°29' N,  16°58' E).

Recoveries:
PHLC 26-5-2011 ZB. Kozielno, Paczkow pull 50°29' N 16°58' E
PHLC 22-3-2012 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E
PHLC 28-3-2012 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E
PHLC 11-4-2012 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E
PHLC 17-2-2013 Minden, Osthafen 3cy 52°18' N 08°56' E
PHLC 4-4-2013 Deponie Pohlsche Heide 3cy 52°23'04"  08°46'53"

In this area are mixed breeding colonies (near Katowice), with far most birds breeding here are cachinnans, but in this area also records of very few michahellis from the south (e.g. ringed female from Italy) and argentatus from eastern Germany are possible (see PDF). PHLC is classic cachinnans.

below: cachinnans 2CY PHLC March 22 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

White headed, compare to 2CY argentatus. Female?

below: several coverts replaced in post-juvenile moult. By March the difference with the older juvenile feathers may be hard to detect.

below: with 2CY argentatus red HL50, from Germany. By March, argentatus is normally still very streaked on head, while cachinnans may be snowy white, streaking concentrated in hindneck.

below: cachinnans 2CY PHLC April 11 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

P1 still present. Elegant head, probably female.

below: together with argentatus and cachinnans.

below: cachinnans 3CY PHLC April 04 2013, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

P1 still present. Elegant head, probably female. Now with 2nd gen flight feathers. Only tiny mirror on right wing, no mirror on left wing.