Pelecaniformes [Compatibility Mode]

Pelecaniformes [Compatibility Mode] - 3/16/2010 1 Order...

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Unformatted text preview: 3/16/2010 1 Order Pelecaniformes About 56 species in seven families: six primary and secondary marine birds and one family of freshwater birds (Anhingidae, 4 spp) Unique features Totipalmate condition: webbing of all four toes. A comb (pectin) on the inner margin of the third claw, used for preening. Families Fregatidae--Frigate birds, 5 spp Phaethontidae--Tropic birds, 3 spp Phalacrococoracidae--Shags & Phalacrococoracidae Shags & cormorants, 30 spp Anhingidae--Anhingas & snakebirds, 4 spp Sulidae--Gannets & boobies, 7 spp Pelecanidae--Pelicans, 7 spp Frigate Birds Frigate birds are pan tropical in distribution. They are parasitic on boobies and tropic birds and are very adept flyers. Take flying fish in the air. They are characterized by long pointed wings, a long and deeply forked tail, short legs, and a long hooked beak composed of separate plates similar in pattern to the Procellariiformes. Frigate Birds The webbing on the toes is not complete--it only extends half-way out. Females are larger than males and have a different plumage different plumage. Males have a large distensible gular pouch. Like cormorants and anhingas, their feathers are not water proof, but frigate birds seldom get wet. Frigate birds sun themselves to restore feather shape. Frigate Birds Their light weight (3+ lbs.) and seven foot wing span makes them indefatigable soaring birds. In the tropics it is hard to time a reunion In the tropics, it is hard to time a reunion and maintain a pair bond. Frigate birds are monogamous for about one year (i.e., one reproductive cycle, it takes more than a year to rear young in the aseasonal tropics). 3/16/2010 2 Magnificent Frigate Magnificent Frigate Tropic (or Bosun's) Birds Tropic birds have a pan tropical distribution. They are characterized by many tern-like features including bill shape and foraging technique technique. Their legs are very short and the middle two tail feathers are elongated into streamers. The sexes are alike and share nesting duties. Tropic (or Bosun's) Birds Like gannets, boobies, and pelicans, tropic birds have a system of subcutaneous air cells which line the front of the body and cushion the impact of aerial dives the impact of aerial dives. They are crepuscular and take fish and cephalopods which migrate to depth during the day. They are called bosun birds because of their long shrill whistle which resembles a bosun's pipe. Redtailed Tropic Bird Redtailed Tropic Bird 3/16/2010 3 Tropic (or Bosun's) Birds The white tailed tropic bird, Phaethon lepturus , nests in Bermuda & Hawaii and elsewhere (pan tropical)....
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Pelecaniformes [Compatibility Mode] - 3/16/2010 1 Order...

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