Larus cachinnans

(last update: February 16, 2013)

Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)


cachinnans plumages

Larus cachinnans 1CY PLAH August 21 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Yellow PLAH and metal PLG DN-28801; ringed as pullus on May 25 2012 at Kozielno, Paczkow, S-SW Poland, (50°28' N,  16°58' E).

PLAH 25-5-2012 ZB. Kozielno, Paczkow 50°28'35" N 16°58'54" E
PLAH 21-8-2012 Deponie Pohlsche Heide 52°23' N 08°46' E
PLAH 21-8-2012 Minden, Osthafen 52°18' N 08°56' 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).

PLAH is cachinnans. Some upper scapulars replaced, lowest row of scapulars still juvenile with post-stamp fringe, delicate notching which is repeated on wing-coverts (MC, LLC and LC). Single wing-coverts replaced in post-juvenile moult as well, notably in central MC. Tertials juvenile. Some patterning on underwing, but mostly pale. Note a single central GC in left wing replaced, also missing a secondary in this location (so maybe small injury after fight).