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The skuas are strong, acrobatic fliers. They are generally aggressive in disposition. Potential predators approaching their nests will be quickly attacked by the parent birds, which usually target the heads of intruders – a practice known as 'divebombing'. [8] Great skua leaving the nest Skua nestling, with egg tooth still present on its beak
The parasitic jaeger (North America) or Arctic skua (Europe) (Stercorarius parasiticus), is a seabird in the skua family Stercorariidae. It is a migratory species that breeds in Northern Scandinavia , Scotland , Iceland , Greenland , Northern Canada , Alaska , and Siberia and winters across the southern hemisphere.
Chilean skuas tend to be dark on their back, flanks, and cheeks, and uniformly light underneath. The dark colour usually extends from their back across the upper chest to form a pectoral collar. The underside of their wings is characteristically cinnamon-coloured, but this colour can be rather dull in some individuals.
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]
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.
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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 ...
More than 38 million Americans have diabetes, and between 90% and 95% of them have type 2 diabetes. While most are adults over the age of 45, an increasing number of children and teens are also ...