Brown Pelicans
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The Brown Pelican (Pelecanus occidentalis) is the smallest member of the seven species of the pelican family.
The Brown Pelican is the state bird of Louisiana.
Distribution / Habitat:
It lives strictly on coasts from Washington and Virginia to the mouth of the Amazon River. Some immature birds may stray to inland freshwater lakes. After nesting, North American birds move in flocks further north along the coasts, returning to warmer waters for winter.
Description:
This bird is distinguished from the American White Pelican by its brown body and its habit of diving for fish from the air, as opposed to co-operative fishing from the surface. It is typically 106-137 cm (42"-54") in length.
Diet / Feedng:
It eats mainly herring-like fish. Groups of Brown Pelicans often travel in single file, flying low over the water's surface.
Nesting / Breeding:
The nest location varies from a simple scrape on the ground on an island to a bulky stick nest in a low tree. These birds nest in colonies, usually on islands.
Status:
Pesticides like DDT and dieldrin threatened its future in the southeast United States and California in the early 1970s. Pesticides also threatened the pelican population in Florida in this period.
A research group from the University of Tampa headed by Dr. Ralph Schreiber conducted research in the Tampa Bay/St Petersburg area and found that DDT caused the pelican eggshells to be overly-thin and incapable of supporting the embryo to maturity. As a result of this research, DDT usage was eliminated in Florida and the rest of the country.
Along with the American White Pelican, the Brown Pelican is protected by the Migratory Bird Treaty Act of 1918.
There are four subspecies:
- P. o. californicus (California Brown Pelican)
- P. o. carolinensis (Eastern Brown Pelican)
- P. o. occidentalis (Caribbean Brown Pelican)
- P. o. thagus (Galapagos Brown Pelican)
The Peruvian Pelican, Pelecanus thagus, used to be considered a subspecies of the Brown Pelican (P. o. thagus). However, due to its well-defined allopatry and because it is much larger and heavier than its relatives, it was reclassified as a separate species.
Copyright: Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from Wikipedia.org
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