They concluded that reversed size dimorphism in skuas and jaegers was not attributable to breeding role specialization. |
They include tundra swans, arctic terns, northern fulmars, black guillemot, and various loons, ducks, geese, gulls, jaegers, and alcids. |
Some species such as skuas, jaegers, and sheathbills are considered obligate kleptoparasites, particularly during the breeding season or on migration. |
The primary predators of eggs and goslings at the study site are herring gulls, parasitic jaegers, ravens and Arctic foxes. |
During our study, pomarine jaegers and snowy owls nested only in the same years as Steller's eiders. |
Watchers at Monomoy this past week discovered hundreds of Wilson's petrels, a few sooty shearwaters, eiders and parasitic jaegers. |