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Seabird mortality caused by long-line fisheries can be greatly reduced by techniques such as setting long-line bait at night, dying the bait blue, setting the bait underwater, increasing the amount of weight on lines and by using bird scarers, [104] and their deployment is increasingly required by many national fishing fleets.
Spending the autumn and winter in the open ocean of the cold northern seas, the Atlantic puffin returns to coastal areas at the start of the breeding season in late spring. It nests in clifftop colonies, digging a burrow in which a single white egg is laid. Chicks mostly feed on whole fish and grow rapidly.
Both parents take turns incubating the egg over about 41 days, and spend another forty days raising the chick. The fledgling leaves the nest alone and at night, making its way towards open water, then quickly dives and swims away to begin independent life. [18] [19] Rises in ocean temperature have increased the reproductive rate of the horned ...
Late autumn storms may carry them south of their normal wintering areas, or into the North Sea, and can cause wrecks of these birds, along with other seabirds, at sea and occasionally on land. [ 18 ] [ 23 ] The British record count was made at the Farne Islands in Northumberland following strong northerly gales on 9–11 November 2007, with ...
They nest in burrows and often give eerie contact calls on their night-time visits. They lay a single white egg. They lay a single white egg. The chicks of some species, notably short-tailed and sooty shearwaters, are subject to harvesting from their nest burrows for food, a practice known as muttonbirding , in Australia and New Zealand.
It is the largest seabird in the northern Atlantic. [2] [3] The sexes are similar in appearance. The adult northern gannet has a mainly white streamlined body with a long neck, and long and slender wings. It is 87–100 cm (34 + 1 ⁄ 2 – 39 + 1 ⁄ 2 in) long with a 170–180 cm (67–71 in) wingspan. The head and nape have a buff tinge that ...
Adult near Burrow on Bruny Island. The photograph was taken at night. Fledgling, Austins Ferry, Tasmania, Australia. The short-tailed shearwater or slender-billed shearwater (Ardenna tenuirostris; formerly Puffinus tenuirostris), also called yolla or moonbird, and commonly known as the muttonbird in Australia, is the most abundant seabird species in Australian waters, and is one of the few ...
The black noddy has a length of 35–37 cm (14–15 in), a wingspan of 66–72 cm (26–28 in) and a weight of 98–144 g (3.5–5.1 oz). It has dark plumage and a pale crown. [8] There is a small white crescent under each eye and a white spot above. It has long tapering wings and a truncated tail. The sharply pointed bill is black.