Heuglin's Gull Larus heuglini heuglini and 'Taimyr Gull' Larus heuglini 'taimyrensis'

'Taimyr Gull' Larus heuglini 'taimyrensis' that is generally regarded as a hybrid population between Vega Gull L. vegae and Heuglin's Gull  L. heuglini is rather easily found among Vega Gulls in Japan. On the other hand Heuglin's Gull L. heuglini heuglini is much scarcer. And identifications often can be problematic when a individual appears like both dark 'Taimyr Gull' and pale Heuglin's Gull. In both forms, molt is later than in Vega Gulls about a month or more, generally finishes in Feb-Mar. We are trying to separate heuglini and 'taimyrensis' in recent pages below. But note that some of those judgments are often tentative.

Heuglin's Gull Larus heuglini heuglini

1st winter, Jan. 17th 2012, Choshi
2nd winter, Jan. 17th 2012, Choshi

Adult, Dec. 27th 2011, Choshi
1st winter, Feb. 15th 2008, Choshi, 
Adult, 2002 Sakawagawa-river

'Taimyr Gull' Larus heuglini 'taimyrensis'

2 1st winters, Jan.17th 2012, Choshi
2 adults, Mar.25th 2011 Tokyo
Adults in Miura, Kanagawa pref.  






A dark adult found in 1986 at Tamagawa-river
Adult
?ャfケ
Adult ?ャfケ
1st winter taimyrensis e・#130;P・#147;~H
1st winter taimyrensis e・#130;P・#147;~H
1st winter taimyrensis  e・#130;P・#147;~H
1st winter taimyrensis flying e・#130;P・#147;~H
2nd winter taimyrensis  e・#130;Q・#147;~H
adult taimyrensis ?ャfケg~H
adult winter taimyrensis ?ャfケg~H
adult winter taimyrensis ?ャfケg~H
2nd winter taimyrensis e・#130;Q・#147;~H
Juvenile taimyrensis ?cH
1st summer to 2nd winter e・#130;P・#137;トH?`e・#130;Q・#147;~H
adult winter taimyrensis ?ャfケ
adult winter taimyrensis ?ャfケg~H
adult winter taimyrensis ?ャfケg~H
juvenile/1st winter taimyrensis ?cH?`e・#130;P・#147;~H
juvenile/1st winter taimyrensis ?cH?`e・#130;P・#147;~H
juvenile/1st winter taimyrensis ?cH?`e・#130;P・#147;~H
juvenile/1st winter taimyrensis ?cH?`e・#130;P・#147;~H
adult winter taimyrensis ?ャfケ
juvenile/1st winter taimyrensis ?cH?`e・#130;P・#147;~H
adult winter taimyrensis flying ?ャfケg~H,hト
adult winter taimyrensis ?ャfケg~H
adult winter taimyrensis  ?ャfケg~H
adult winter taimyrensis  ?ャfケg~H
adult winter taimyrensis ?ャfケg~H
4th winter taimyrensis e・・#147;~H
adult winter taimyrensis ?ャfケg~H
adult winter taimyrensis ?ャfケg~H
adult winter taimyrensis ?ャfケg~H
1st winter taimyrensis e・#130;P・#147;~H
probable intergrade with birulai ?ャfケ
adult summer/winter taimyrensis ?ャfケ
adult summer/winter taimyrensis ?ャfケ
3adult winter taimyrensis ?ャfケ
5adult winter taimyrensis ?ャfケ
adult winter taimyrensis ?ャfケ
1st winter taimyrensis e・#130;P・#147;~H
adult Heuglin's Gulls ?ャfケ
Adult summer taimyrensis ?ャfケ
Juvenile taimyrensis ?cH
Adult summer taimyrensis ?ャfケ
2 adult taimyrensis   
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