Closely related species breed in the Antarctic and sub-Antarctic, and show strong adaptations to cold conditions and a predatory life-style. The Northern Ireland Seabird Report 2013. One study found that 112 males weighed an average of 1.27 kg (2.8 lb) and that 125 females weighed an average of 1.41 kg (3.1 lb). In 2011, a single pair nested, laying two eggs, one of which hatched and the chick subsequently fledged. A single pair bred there successfully in 2011, 2014, 2015 and 201621,22. The English name and species name "skua" is believed to originate from the Faroese skúvur or skúgvur [ˈskɪkvʊər] and is the only known bird name to originate from the Faroesthat has come into regular use elsewhere. The great skua breeds in Iceland, Norway, the Faroe Islands, and on Scottish islands, with some individuals breeding on mainland Scotland and in the northwest of Ireland. Data on the productivity of great skuas in Ireland are scarce, although the recent colonists in Northern Ireland have been closely monitored, where productivity measures an average of 1.67 chicks fledged per pair per year. British Trust for Ornithology, Thetford. 2002. Annual monitoring data from six Arctic skua colonies in Shetland (Fair Isle, Fetlar, Foula, Hermaness, Mousa and Noss) between 2003 and 2018 recorded 43 cases of complete colony failure out of a possible 85 colony-years, not one instance of complete failure for the great skua occurred over the same period. This currently limits their southerly extent and it is likely that climate change will further reduce available breeding habitat and their distribution in the UK. In adults they can be streaked with greyish brown, with a black cap. 60% of the global population breed in Scottish colonies. Juveniles show a darker head and russet underparts, and the white wing flashes may not be as well developed as on adults. Predation by great skuas at a large Shetland seabird colony. Based on SMP data; view the methods of analysis. Poyser, London. The great skua, or bonxie, is famous for its aggressive defence of territory against human intruders. In the west of Scotland, four colonies (Priest Island, Canna, Fladda and Lunga and Sgeir a' Chaisteil) held 19 AOT in 2013 and 21 AOT in 2018. 3 Votier, S.C., Bearhop, S., MacCormick, A., Ratcliffe, N and Furness, R.W. PLoS ONE, 10(7). However, on some occasions, too few data are available from which to provide a meaningful average. In Scotland, great skuas nest on coastal moorland, often in loose groups of scattered nests, but with some colonies numbering thousands of pairs. Partners to the SMP are: BirdWatch Ireland; The British Trust for Ornithology; UK Centre for Ecology and Hydrology; Natural Resources Wales; Department of Environment, Food and Agriculture (Isle of Man); Department of Environment, Heritage and Local Government (Republic of Ireland); States of Guernsey Government; JNCC; Manx Birdlife; Manx National Heritage; The National Trust; National Trust for Scotland; Natural England; Northern Ireland Department of Agriculture, Environment and Rural Affairs; The Royal Society for the Protection of Birds; Scottish Natural Heritage; Seabird Group; Shetland Oil Terminal Environmental Advisory Group; Scottish Wildlife Trust. Registered office as above, Javascript must be enabled for the correct page display, UK population estimates and change 1969–2002 (census data), Annual abundance and productivity by geographical area, Birds of Conservation Concern in Ireland 2014-2019, Seabird Monitoring Programme online database, European storm-petrel (Hydrobates pelagicus), Leach's storm-petrel (Oceanodroma leucorhoa), European shag (Phalacrocorax aristotelis), Black-legged kittiwake (Rissa tridactyla), Black-headed gull (Chroicocephalus ridibundus), Mediterranean gull (Larus melanocephalus). Periods of low productivity occurred during the late 1980s, the early 2000s and from 2011 to 2014. The Great Skua is the largest Skua in the Northern Hemisphere, 60% of the world population breeding in Scotland, The Western Isles, Shetland & Orkney, This great skuas was near the Shiants - after the fish we were catching, it kept swooping down so close that often was only an inch above our heads.

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