Procellariiformes [Compatibility Mode]

Procellariiformes [Compatibility Mode] - Albatrosses...

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3/16/2010 1 Tubenoses, Order Procellariiformes Unique characters: Tubular nostrils Albatrosses, Mutton-birds, & other petrels In general group is highly pelagic individuals spend most of their lives wandering over a trackless sea. Young are fed a clear yellow stomach oil They can also discharge the oil when disturbed 75% of the species breed and spend most of their time south of the equator Fossil record dates to Eocene, 58-60 mybp Most petrels visit land only for breeding purposes They arrive at dusk and depart near dawn Most nest underground Only one egg is laid It is generally large for the size of the bird and white in color. Storm-petrel’s eggs may have fine spots. The incubation and nesting periods are prolonged, and rearing young is difficult. Both sexes share in incubation and care of the young. Except in the Wandering Albatross, both sexes have similar plumages, and are generally similar in size, but in some species males tend to be larger, especially in the bills. Some species such as the Northern Fulmar have albinistic and melanistic forms (i.e., light and dark color phases). Members of this order are instantly distinguishable from other orders because of the external nostrils the external nostrils form tubes at the top of the beak. (Old name tubenares) . The nasal sense organ is highly developed and the beak is divided into distinct plates Bill plates 1. Nostrils 2. Culminicorn 3. Max. unguis 4 Latericorn 4. Latericorn 5. Mandibular unguis 6. Ramicorn 7. Sulcus 8. Naricorn
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3/16/2010 2 Most members of this order are characterized by a peculiar musky odor which persists for many years in study skins. Swennen (1974) did experiments with a Northern Fulmar that indicate that they can eject a stomach oil that kills competitors (~fuel oil). Family Diomdeidae 13 species of Albatrosses 3 species occur in the North Pacific: the Laysan, Blackfooted, and Short-tailed albatrosses (all now genus Phoebastria albatrosses (all now genus ) None occur regularly in the North Atlantic Well known as ship followers with a world wide distribution except in the North Atlantic and frozen Arctic Sailors know them as "gooney" or "mollymawks" (=Stupid, apparently because of their lack of fear of man at sea) Wing spans reach up to 11.5 feet Champion Gliders can be "grounded" in flat calm distribution is limited to windy and rough seas Albatross Distribution Nine of 13 species are found between the 'roaring 40's' and the 'furious 50's' where winds blow from west to east Windless doldrums around equator are barriers Fossils from North Atlantic before Ice Age Now too few stragglers cross equator to establish any species in the North Atlantic Less than 12 individuals have been reported in North Atlantic during the 20th century Albatross breeding Courtship antics function in mate
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Procellariiformes [Compatibility Mode] - Albatrosses...

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