Its long narrow wings are slightly swept-back. In the Atlantic, it is the only such bird, whereas in the Pacific part of its range, other all-dark large shearwaters are found. ... Sooty Shearwater - Ardenna grisea. The under wing coverts are pale. They are monogamous with shared incubation and chick care. Accordingly, this paper will deal solely with the young shearwater … The bill is long and dark, and the legs and feet are black. Sooty Shearwaters breeds (November to February) in large colonies on sub-Antarctic islands. We may expect recovery of the site to be rapid if either (1) birds nesting at the site prior to destruction are not unduly disturbed and/or (2) a population of floaters exists that can quickly fill any nesting positions abandoned by resident birds. Sooty Shearwater: Makes inhaled and exhaled "koo-wah, koo-wah, koo-wah" notes on breeding grounds; usually silent at sea. Fig. Similar Species. Shearwater migrations originating from breeding colonies in New Zealand. It alternates strong direct flapping with long glides. Particularly the Short-tailed Shearwater is almost impossible to tell … Breeding sooty shearwaters Puffinus griseus cycle between long (11 to 14 d) and short (1 to 2 d) foraging bouts at sea, but no information exists on bird behavior during these trips. Sooty Shearwater: This large bird has a dark gray-brown body, darkest on the tail and primaries. (a) Interpolated geolocation tracks of 19 sooty shearwaters during breeding (light blue) and subsequent migration pathways (yellow, start of migration and northward transit; orange, wintering grounds and southward transit).The 30° parallels, equator, and international dateline are indicted by dashed lines. Chris Jones, Sooty shearwater ( Puffinus griseus ) breeding colonies on mainland South Island, New Zealand: Evidence of decline and predictors of persistence , New Zealand Journal of Zoology, 10.1080/03014223.2000.9518242, 27, 4, (327-334), (2000). In calm weather the Sooty Shearwater flies low over the ocean with quick, stiff beats of its narrow wings; in windy conditions, it glides and scales effortlessly over the waves. Burrows are dug for breeding under tussock grass, low scrub and on the Snares Islands under Olearia forest. Breeding. On the open ocean off … THE NESTLING OF THE SOOTY SHEARWATER By L. E. RICHDALE In an earlier paper on the breeding habits of the Sooty Shearwater (Pufinus griseus) in New Zealand (Richdale, 1944b: 102), it was necessary to withhold the story of the nestling. Recovery will be considerably longer Breeding. Usually loud, Sooty Shearwaters coo and croak while on the breeding grounds. Sooty shearwaters breed in large, dense colonies. New Zealand has by far the largest breeding population, with 5 million pairs in 80 colonies – approximately half the world population. The sexes are similar. It disperses northwards into the Atlantic following breeding and spends the summer off the eastern American seaboard and Greenland. Portugal - Açores (PT) 2009-06-09 Gerard Visser Mobile apps. Shearwaters can also "swim" with their wings to pursue prey underwater to a depth of 200 feet (61 m). The nest is lined with leaf litter and is in a … While migrating, sooty shearwaters can travel up to 620 miles (1,000 km) in a single day. Sociable at sea, it is often seen in gatherings of hundreds or even thousands, flying in long lines or resting in dense rafts on the water. Sooty Shearwater: Cory's Shearwater has white underparts, a yellow bill, and lighter upperparts. Sooty shearwater only breed in temperate and subantarctic regions of the Southern Hemisphere, in New Zealand, Australia, Chile and the Falkland Islands. on the breeding biology of sooty shearwaters (Puffinus griseus). 1. The name "shearwater" refers to the bird's habit of gliding with stiff, still wings between waves just above the water's surface. Birds typically do not return to their natal colonies until the age of four. Wintering. It eats fish, squid and crustaceans. Sooty shearwaters migrate to the North Pacific Ocean, where they may be at greater risk from pollutants and gill net fisheries.
2020 sooty shearwater breeding habits