Larus cachinnans

(last update: February 16, 2013)

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

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cachinnans plumages

Larus cachinnans 1CY-2CY 2L1C October 2009 - October 2010, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

2L1C yellow and metal Kaunas EN03512 (LIK), ringed as pullus on June 09 2009 at Novaraistis, Lithuania (54°56'56" N, 23°25'07" E). Bird from mixed colony "argentatus".

Recoveries:
17-10-2009 Deponie Pohlsche Heide 52°23' N 08°46' E
22-10-2009 Deponie Pohlsche Heide 52°23' N 08°46' E
9-6-2010 Windheim, Sandpit 52°24'50"  09°01'49"
26-7-2010 Deponie Pohlsche Heide 52°23' N 08°46' E
29-7-2010 Deponie Pohlsche Heide 52°23' N 08°46' E
30-7-2010 Deponie Pohlsche Heide 52°23' N 08°46' E
11-9-2010 Deponie Pohlsche Heide 52°23' N 08°46' E
11-9-2010 Hävern, Grube Nord 52°26' N 09°00' E
18-9-2010 Deponie Pohlsche Heide 52°23' N 08°46' E
25-9-2010 Deponie Pohlsche Heide 52°23' N 08°46' E
2-10-2010 Deponie Pohlsche Heide 52°23' N 08°46' E

below: cachinnans 1CY 2L1C October 17 2009, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Almost all scapulars replaced, except lower row. Both in left wing and in right wing single LLC replaced as well.

below: cachinnans 1CY 2L1C October 22 2009, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Scap moult almost completed.

below: cachinnans 2CY 2L1C June 09 2010, Windheim, Germany. Picture: Armin Deutsch.

Bird in complete moult. MC replaced, central GC missing, now exposing the bases of the secondaries lying underneath. Outer primaries old juvenile.

below: cachinnans 2CY 2L1C July 26 2010, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Near end of the complete moult, only P10 is old juvenile. P1-P7 new 2nd gen, P8 halfway. Large moult gap in central secondaries and several new tail-feathers visible.

below: cachinnans 2CY 2L1C July 29 2010, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Only three days later. Together with Larus michahellis (right bird).

below: cachinnans 2CY 2L1C September 18 2010, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

P9 fully grown, P10 at 3/4 of the length. A subsequent moult takes place, so-called "partial autumn moult", which includes again the MC, inner GC and upper TT. These new feathers will look more adult-like, grey, but still with dark shaft streak.

below: cachinnans 2CY 2L1C September 25 2010, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

below: cachinnans 2CY 2L1C October 02 2010, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Near end of the partial autumn moult. Also, now P10 fully grown.