H.J. Ruiz – Avian101

Brown Pelican – Spec. Name: Pelecanus Occidentalis

This is the smallest of the eight species of pelican, although it is a large bird in nearly every other regard. It is 106–137 cm (42–54 in) in length, weighs from 2.75 to 5.5 kg (6.1 to 12 lb) and has a wingspan from 1.83 to 2.5 m (6.0 to 8.2 ft).

Brown Pelican

The Brown Pelican lives on coasts in the Americas from Washington and Virginia south to northern Peru and the mouth of the Amazon River, as well as the island of Saut d’Eau in Trinidad and Tobago. 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. Their young are hatched in broods of about 3, and eat around 150 lbs. of fish in the 8–10 month period they are cared for.

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 eats mainly fish and amphibians as well as crustaceans. Groups of Brown Pelicans often travel in single file, flying low over the water’s surface.

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.

Pesticides like DDT and dieldrin threatened the Brown Pelican’s 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 too thin and incapable of supporting the embryo to maturity. As a result of this research, DDT usage was eliminated in Florida, followed by the rest of the US. Along with the American White Pelican, the Brown Pelican is protected by the Migratory Bird Treaty Act of 1918.

Photographs are © H.J. Ruiz – “My Backyard Visitors” Taken in Bradenton Beach, Florida

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