Catharacta

American sheathbill (Chionis alba); south polar skua (Catharacta maccormicki); brown skua (Catharacta lonnbergi); southern black-backed gull (Larus dominicanus); and,

Antarctic Peninsula 2009

First, such reductions are likely to happen most rapidly in species that experience some physiological constraint at their southern range margin, for example, the winter thermal constraint postulated for cloudberry [23] or the summer thermal constraints postulated for the great skua (Catharacta skua [24]).

Recent and projected changes in arctic species distributions and potential ranges 2009

Only the marauding subantarctic skua Catharacta antarctica feeds on the island, mostly on spectacled petrels.

Gough Island Wildlife Reserve, United Kingdom 2008

Le Corre suggests that the occurrence of the white-tailed brown morph at Europa may act as a defensive camouflage against kleptoparasitism (a behavior of stealing another bird's catch) by great frigatebirds (Fregata minor) and brown skuas (Catharacta antarctica).

Ile Europa and Bassas da India xeric scrub 2008

Rabbits have been the main threat in the past, causing widespread vegetation changes and providing an abundance of prey for cats and the main native predator, brown skua Catharacta lonnbergi, which is now declining as a result of rabbit control.

MacQuarie Island, Australia 2008

Predation by a small but growing number of skuas Catharacta skua (170 pairs) may be partly responsible.

St Kilda (Hirta) National Nature Reserve, United Kingdom 2008

However, calling is a costly activity in some petrel species since avian predators, such as skuas Catharacta skua lönnbergi, use calls to localize their petrel prey

PLoS ONE Alerts: New Articles 2009

Other residents of the islands are sooty albatross (Phoebetria fusca) (240 pairs), remnant populations of soft-plumaged petrel (Pterodroma mollis) and grey petrel (Procellaria cinera), antarctic tern (Sterna vittata tristanensis), brown skua (Catharacta lonnbergi), and common waxbill (Estrilda astrild) (introduced 1977-1985).

Amsterdam and Saint-Paul Islands temperate grasslands 2007