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The great skua (Stercorarius skua), sometimes known by the name bonxie in Britain, is a large seabird in the skua family Stercorariidae. It is roughly the size of a herring gull . It mainly eats fish caught at the sea surface or taken from other birds.
The eggs and chicks of other seabirds, primarily penguins, are an important food source for most skua species during the nesting season. [6] In the southern oceans and Antarctica region, some skua species (especially the south polar skua) will readily scavenge carcasses at breeding colonies of both penguins and pinnipeds. Skuas will also kill ...
Brown skua eyeing a king penguin carcass. This is the heaviest species of skua and rivals the largest gulls, the great black-backed gull and glaucous gull, as the heaviest species in the shorebird order although not as large in length or wingspan. [2]
Historically, the great black-backed gull was shot as a hunting trophy ("after about 1850 ... smaller gulls were shot remorselessly for little more than target practice but the Great Black-backed Gull was a prize worth displaying" [48]) and harvested for its feathers, which were used in the hat-making trade; as a result the species became ...
Gulls of Europe, Asia and North America by Klaus Malling Olsen and Hans Larsson is a volume in the Helm Identification Guides series of bird identification books.. The book is intended to succeed Peter J. Grant's Gulls: A Guide to Identification as the standard identification work on Northern Hemisphere gulls.
The most likely explanation is extensive hybridization between the great and one species of lesser skuas, which resulted in a hybrid population that eventually evolved into a distinct species, the pomarine jaeger; or alternatively between the pomarine and a species of Southern Hemisphere skua, with the great skua being the hybrid offspring ...
This is the smallest of the skua family at 38–58 cm (15–23 in), depending on season and age. However up to 29 cm (11 in) of its length can be made up by the tail which may include the 15 cm (5.9 in) tail streamers of the summer adult.