Larus cachinnans

(last update: February 16, 2013)

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

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cachinnans plumages

Larus cachinnans 2CY-4CY UKK L-010265 March 2011 - February 2013, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Metal ring from Kiev, Ukraine, L-010265, cachinnans ringed as pullus on June 05 2010 in Kreminchuk Reservoir, Cherkassy O. Ukraine (49°24'00"N, 32°09'00"E).

Recoveries for UKK L-010265:
L 010265 5-6-2010 Kreminchuk Reservoir, Cherkassy O. pull 49°24'00"  32°09'00"
L 010265 r 3-3-2011 Deponie Pohlsche Heide 2cy 52°23'04"  08°46'53"
L 010265 r 29-12-2011 Deponie Pohlsche Heide 2cy 52°23'04"  08°46'53"
L 010265 r 3-3-2012 Deponie Pohlsche Heide 3cy 52°23'04"  08°46'53"
L 010265 r 8-3-2012 Deponie Pohlsche Heide 3cy 52°23'04"  08°46'53"
L 010265 r 13-2-2013 Deponie Pohlsche Heide 4cy 52°23'04"  08°46'53"

This bird remained very immature in plumage!

below: cachinnans 2CY UKK L-010265 March 03 2011, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

One tail feather replaced. Venetian blind effect not very conspicious on inner primaries due to gradual transition of dark outerwebs into paler innerwebs. Dark outer GC. Very bold smudgy pattern on 2nd gen scapulars.

below: only limited moult in coverts and tertials.

below: cachinnans 2CY UKK L-010265 December 29 2011, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Second winter, but plumage much like 1st winter birds, lacking extensive grey areas in upperparts. Note pale iris and 2nd gen remiges. No mirror on P10.

below: cachinnans 3CY UKK L-010265 March 03 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

With Herring Gulls argentatus.

below: adopts albatros posture when giving laughing long call.

two images below: showing left and right side wing-covert panel. Note that a few coverts have been replaced again in partiala autumn moult, but still look very much 2nd gen like in pattern (bold club pattern).

below: cachinnans 3CY UKK L-010265 March 08 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

This bird is one the very few cachinnans lacking any adult grey feather by 3CY March.

below: cachinnans 4CY UKK L-010265 February 13 2013, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Resting bird could be misidentified as 3CY bird (2nd cycle). Hardly any mirror on 3rd gen P10! Extensive dark in secondaries and many coverts and lower tertials showing immature patterns. Pale eyed individual. If without ring, such birds only aged safely on pattern on P5 and inner primaries.

L-010275 was also photographed by Armin (great work!) and is a bird from the same colony, same breeding season, same ringing date. Compare these two birds here.