Gerrit Vyn / Aerial view of large flock of molting Brant. These geese have found refuge on a shallow lake. During their summer moult the geese are flightless. The Teshekpuk Lake area is the most important goose m...

Gerrit Vyn / Molting Brant (Branta bernicla) being held in an enclosure during a banding operation in the Teshekpuk Lake Special Area. During their moult they are unable to fly. Arctic Coastal Plain, Alaska, USA

Gerrit Vyn / Molting Brant (Branta bernicla) being held in an enclosure during a banding operation in the Teshekpuk Lake Special Area. During their moult they are unable to fly. Arctic Coastal Plain, Alaska, USA

Gerrit Vyn / Sabine gull (Larus / Xema sabini) Teshekpuk Lake Special Area, Alaska, USA July

Gerrit Vyn / Flock of White Fronted Geese (Anser albifrons) in molt, on water, Teshekpuk Lake, Alaska, USA, July.

Gerrit Vyn / Aerial view of a large flock of Brant geese (Branta bernicla) molting on a shallow lake in the Teshekpuk Lake Special Area, July. Up to 1/3 of the Brant that moult in the Pacific flyway are threatened...

Gerrit Vyn / Flock of molting Brant's geese (Branta bernicla) in July. During this vulnerable period in their life-cycle, they are unable to fly. Teshekpuk Lake Special Area, Alaska, USA