Larus cachinnans

(last update: February 16, 2013)

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

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cachinnans plumages

Larus cachinnans 2CY-3CY PHKB October 2012, Minden, Germany & January 2013, Sonzay Indre-et-Loire, France.

Yellow PHKB and metal PLG DN-27232; ringed as pullus on May 26 2011 at Kozielno, Paczkow, S-SW Poland, (50°29' N,  16°58' E).

Ringed yellow PHKB and metal DN27232, ringed as pullus on May 26 2011 at Kozielno Paczkow Opolskie Poland (50,48 19,97).

Recoveries:
PHKB 26-5-2011 ZB. Kozielno, Paczkow pull 50°29' N 16°58' E
PHKB 9-4-2012 SPROITZ: SATZFISCHANLAGE (DRESDEN, GERMANY) 2cy    
PHKB 4-10-2012 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E
PHKB 8-10-2012 Deponie Pohlsche Heide 2cy 52°23' N 08°46' E
PHKB 5-1-2013 Sonzay Indre-et-Loire, France 3cy    

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). PHKB is classic cachinnans.

below: cachinnans 2CY PHKB October 04 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

End of complete moult, P10 fully grown, with a small but obvious mirror. Many 2CY cachinanns have a subsequent partial autumn moult in September-October; this bird is no exception. The partial moult included again (for the 2nd time this year) GC1-2, MC1-2, few outermost LLC, TT1-2.
Last replaced scaps are adult-like grey, but still with obvious dark shaft streak.

below: with 1CY cachinnans PKSD.

below: compare 2CY October cachinnans PHKB with 2CY October argentatus H70W.

H70W still in complete moult (P8 fully grown) and overall pattern is very 2nd gen-like with bold chequered lines and vermiculation on all coverts and scaps.

below: cachinnans 3CY PHKB January 05 2013, Sonzay Indre-et-Loire, France. Picture: Patrick Derrien.

Several feathers replaced again in partial autumn moult: upper tertials, inner GC, inner MC. No complete grey saddle.