Larus cachinnans

(last update: February 16, 2013)

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cachinnans in Poland

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cachinnans plumages

1cy August
1cy September
1cy October
1cy November
1cy December

2cy January
2cy February
2cy March
2cy April
2cy May
2cy June
2cy July
2cy August
2cy September
2cy October
2cy November
2cy December

3cy January
3cy February
3cy March
3cy April
3cy May
3cy June
3cy July
3cy August
3cy September
3cy October
3cy November
3cy December

sub-adult January
sub-adult February
sub-adult March
sub-adult April
sub-adult May
sub-adult June
sub-adult July
sub-adult August
sub-adult September
sub-adult October
sub-adult November
sub-adult December

adult January
adult February
adult March
adult April
adult May
adult June
adult July
adult August
adult September
adult October
adult November
adult December

Larus cachinnans 1CY-2CY PLG DN-28100 August 2012 - April 2013, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Metal ring from Poland, PLG DN-28100, cachinnans ringed as pullus on May 10 2012 by Marcin Sidelnik, in Wyspa na Wisle, Kepa Nadbrzeska (= Island in the Vistula River, Kepa Nadbrzeska), near Warschau, Poland (52°01' N, 21°13' E). This colony holds a mixed population, with cachinnans dominating and argentatus, michahellis and even single fuscus breeding as well. Details on the composition of these breeding colonies, see LOCATIONS and RESULTS and ORIGIN & MIGRATION.

Recoveries:

DN 28100	10-5-2012	Wyspa na Wisle, Kepa Nadbrzeska	cach colony	pull	52°01'00"	21°13'00"
DN 28100	21-8-2012	Deponie Pohlsche Heide	Steppenmöwe	1cy	52°23'04"	08°46'53"
DN 28100	28-8-2012	Deponie Pohlsche Heide	Steppenmöwe	1cy	52°23'04"	08°46'53"
DN 28100	25-4-2013	Deponie Pohlsche Heide		2cy	52°23'04"	08°46'53"

below: cachinnans 1CY PLG DN-28100 August 21 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Several scaps replaced; no coverts and no tertials replaced.

below: cachinnans 1CY PLG DN-28100 August 28 2012, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

Bird recalls Herring Gull argentatus, by head shape, bill shape and by notched pattern on lower scaps, inner GC and tertial fringes.

below: with green ringed German 1CY argentatus. Now starting to drop innermost GC and MC in post-juvenile moult.

below: cachinnans 2CY PLG DN-28100 April 25 2013, Deponie Pohlsche Heide - Minden, Germany (52°23'05N, 08°46'45E). Picture: Armin Deutsch.

By spring, hard to be certain about the exact post-juvenile moult as all feathers look very worn and bleached. One central tail feather replaced. Note short, stocky legs and lack of ventral bulge.