Larus cachinnans

(last update: February 16, 2013)

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

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cachinnans plumages

Larus cachinnans 1CY-2CY PKND October, November, December 2012 & March 2013, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Yellow PKND and metal PLG DN-28664; ringed as pullus on May 25 2012 at Kozielno, Paczkow, S-SW Poland, (50°28' N,  16°58' E).

Recoveries:
PKND 25-05-2012 ZB. Kozielno, Paczkow pull 50°28'35" N 16°58'54" E
PKND 30-10-2012 Deponie Pohlsche Heide 1cy 52°23' N 08°46' E
PKND 19-11-2012 Deponie Pohlsche Heide 1cy 52°23' N 08°46' E
PKND 28-11-2012 Deponie Pohlsche Heide 1cy 52°23' N 08°46' E
PKND 03-12-2012 Deponie Pohlsche Heide 1cy 52°23' N 08°46' E
PKND 11-12-2012 Deponie Pohlsche Heide 1cy 52°23' N 08°46' E
PKND 20-12-2012 Deponie Pohlsche Heide 1cy 52°23' N 08°46' E
PKND 15-01-2013 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E
PKND 13-02-2013 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E
PKND 27-02-2013 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E
PKND 13-03-2013 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E
PKND 21-03-2013 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E

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).

PKND is classic cachinnans.

below: cachinnans 1CY PKND October 30 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

With 1CY argentatus (right), note difference in extent of scapular moult.

below: cachinnans 1CY PKND November 19 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Typical long-call in cachinnans, sounds 'laughing'. With some experience, cachinnans can be picked out of gull flocks on call alone.

below: cachinnans 1CY PKND December 11 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Strong patterned 2nd gen feathers with irregular bordered dark centres on scapulars.

below: cachinnans 1CY PKND December 20 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Note the presence of a venetian blind effect much depends of the viewing angle relative to the observer, illustrated by the image below.

below: cachinnans 2CY PKND March 13 2013, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Together with green ringed 3CY cachinnans XLCU from Germany.