Sentences with word «skua»

The scientists monitored skuas in Adélie Land and the Kerguelen Islands for ten years and showed that, when these seabirds exhibit high mercury levels in their blood, their breeding success decreases.

Unexpectedly, it is in the least contaminated species, the south polar skua, that the effects of mercury are the most obvious.

Birds exotic to Britain, such as species normally expected in the tundra to the north (like skuas, and hawk owls), the Mediterranean to the South (like alpine swifts) or the Eastern steppes (like demoiselle cranes and long - legged buzzards) lived together with birds expected in the region today (such as grey herons and wood pigeons).

To add to Cranford's misery, the freezer was already occupied by a giant skua, a swan - size bird recently captured in the Antarctic.

Iceland is home to 23 species of Atlantic seabirds, including Atlantic puffins (pictured), black murres, kittiwakes, and great skua — but those populations, like those across the North Atlantic, are in serious trouble.

In the Polar Regions, many seabirds such as skuas were known to accumulate this toxic element at high levels in their tissues.

Modelling by the researchers indicates that, if mercury contamination continues to increase, skua populations could decline in the long term.

We are studying the distribution of nests, the breeding success of the different skua pairs, and the communication system of the species.

Most are fascinated to learn that the birds they see on one trip nest in a variety of places... Parasitic Jaegers on Alaska's arctic tundra, Northern Fulmars on Aleutian sea cliffs, Tufted Puffins in burrows on Oregon's offshore islands, Black - footed Albatrosses on Midway Island and other coral atolls, Buller's Shearwaters in New Zealand and Australia, Pink - footed Shearwaters on islands off Chile, South Polar Skuas on Antarctica.»

Some species don't get the chance to seek cooler climate as climate change has also caused the disappearance of many creatures including emperor penguins, which lost 50 percent of their population; rockhopper penguins in Campbell Island dipped by 96 percent; ivy gull lost 70 percent; and Arctic skua breeding numbers in Scotland decreased 74 percent from 1986 to 2011.

The oceanarium was holding the skua in isolation before introducing it to other animals in an exhibit.

A nice final touch is the skua in the bottom right of the frame, seemingly taking a keen interest in the outcome.

The first finding was that mercury levels in brown skuas were three times higher than in south polar skuas.

For the first time, the researchers have carried out a ten - year population study of two seabird species: brown skuas living in the Kerguelen Islands (Subantarctic) and south polar skuas living in Adélie Land (Antarctica).

Skuas are migratory birds that feed essentially on penguin eggs and chicks, as well as fish.

The researchers first captured around a hundred south polar skuas and brown skuas and took blood samples to measure their mercury levels.

Skuas can rear one to two chicks per year.

Photo opportunities at near point blank range abound and the group is treated to scintillating views of several species of albatross, petrels, including Pintado (or Cape Pigeon), both Northern and Southern Giant Petrels, shearwaters, skuas, and gannets along with a chance of an extremely rare sighting of a vagrant species such as Antarctic Fulmar or a «stonking» great Royal Albatross.

The Elephant Seal Research Group is carrying out a research project on the skuas of Sea Lion Island.

Further out to sea where the continental shelf drops off, the region is one of Australia's best pelagic birding sites, with an abundance of albatross across winter months, shearwaters in summer months, with petrels, gannets, skuas, terns and gulls also present.

There are up to 12 species of albatross plus penguins, gannets, skuas, shearwaters, petrels and terns using the waters off Kaikoura as their feeding ground.