What are the four species of skua
that call the UK home?
A RATHER large and impressive seabird known as a pomarine skua
has attracted birdwatchers from far and wide to South Gare.
Some seabirds (e.g., skuas
, Stercorarius spp., and frigatebirds, Fregata spp.) specialize in kleptoparasitism and rely on piracy for most of their energy acquisition.
The researchers' scenarios show that the change in the lemming population is likely to reduce skuas
' breeding at both of the two Greenland areas the researchers modeled for (two completely uninhabited areas of one million square kilometers).
Eighty-six dead birds were found: 5 kelp gulls (Larus dominicanus), 36 skuas
(Stercorarius sp), and 45 Adelie penguins (Pygoscelis adeliae).
have also suffered unprecedented breeding failure.
The 120-foot lighthouse, with its 170 worn wooden steps, is a great vantage point for birders who come to see grebes, gannets, skuas
and the occasional shearwater or storm petrel on their migratory route through Scandinavia.
Discard dilemma When fishing fleets threw smaller amounts of discarded fish overboard, great skuas
made up for lost meals by increasing attacks on other seabirds (165:115).
If S Macdonald wants to kill the sparrowhawks, because they kill small birds, then why not kill all cuckoos, woodpeckers, herons, harriers, kestrels, falcons, water rails, skuas
, gulls, corvids, owls and shrikes, all of which feed on birds, and while you are at it, why not kill all stoats, weasels and pine martens, which also kill birds and red squirrels.
Great black-backed gulls, great skuas
, and northern gannets out compete other birds for discard from boats.
The research carried out by the University of Glasgow and published in Nature magazine found great skuas
, one of the North Sea's top predators, are preying on small birds such as guillemots and puffins.