Larus cachinnans

(last update: February 16, 2013)

Greg Neubauer
Marcin Przymencki
Albert de Jong
Mars Muusse


cachinnans plumages

Larus cachinnans 2CY PDEE July 01 2011, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Yellow PDEE and metal (PLG) DN18586, ringed as pullus on May 27 2010 at Kozielno, Paczkow, S-SW Poland, (50°29' N,  16°58' E).

PDEE 27-5-2010 ZB. Kozielno, Paczkow 50°29' N 16°58' E
PDEE 1-7-2011 Deponie Pohlsche Heide 52°23' N 08°46' E
PDEE 1-7-2011 Windheim, Sandpit 52°24'50" N 09°01'49" 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). PDEE is classic cachinnans.

First day of July, bird in complete moult. P1-P5 new, P6 growing, P8-P10 old juvenile. This bird follows a standard moult sequence, and at this stage initiates moult in rectrices and secondaries. Rectrices are replaced centrifugal, i.e. starting with central feathers and progresses outwards. Secondary moult just started, S1 dropped.

In the wing coverts, MC and most LLC replaced, gap in GC nearly closed as well. Last juvenile feathers to be found in carpal edge.