Magnificent Frigatebird
Magnificent Frigatebird
Fregata magnificens
At a Glance
In North America, Magnificent Frigatebirds are seen most commonly in Florida. However, they also appear regularly along the Gulf Coast, and strays have turned up in many parts of the continent.
All bird guide text and rangemaps adapted from by Kenn Kaufman© 1996, used by permission of Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Category
Frigatebird, Gull-like Birds
IUCN Status
Least Concern
Habitat
Coasts and Shorelines, Open Ocean
Region
California, Florida, Southeast, Southwest, Texas
Behavior
Direct Flight, Rapid Wingbeats, Soaring
Population
130.000
Range & Identification
Migration & Range Maps
Apparently not truly migratory. Present year-round in southern Florida; in northern Florida and along Gulf Coast, more common in summer. Nesting colonies are widely dispersed among islands and coasts of tropical America (and very locally off west Africa), but nonbreeders and immatures are seen far from colonies at all seasons. Small numbers (mostly immatures) regularly wander inland in southwest in summer. Rarely wanders north along coasts or far inland.
Description
38-40" (97-102 cm). W. 7'6 (2.3 m). Very large, with long, narrow, angular wings; long tail; long hooked bill. Adult male all black with red throat pouch, sometimes inflated in display; female has white chest, juvenile has white head. Nothing else is really similar (Swallow-tailed Kite is much smaller, has blue-gray back).
Size
About the size of a Heron
Color
Black, Brown, Red, White
Wing Shape
Long, Pointed, Tapered
Tail Shape
Forked, Long, Pointed
Songs and Calls
Usually silent at sea; harsh guttural calls during courtship.
Call Pattern
Falling, Undulating
Call Type
Chatter, Odd, Rattle
Habitat
Oceanic coasts, islands. Occurs over warm waters, usually along coast but also far offshore at times. Also soars inland in coastal areas (for example, crosses isthmus of Panama from one ocean to the other). Strays are rarely seen far inland around fresh water. Nests on islands, usually small islands with dense growth of mangroves or other trees or shrubs.
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Behavior
Eggs
One. White. Incubation is by both sexes, probably 40-50 days.
Young
Both parents feed young. Nest is never left unguarded until young are half-grown, as other members of colony will eat eggs or young at unattended nest. Male departs after about 12 weeks, female continues to feed young. Age at first flight 20-24 weeks; female will feed young for additional 16 weeks or more. Total breeding cycle for female thus lasts about a year; most females probably do not breed every year.
Feeding Behavior
Forages in the air, swooping close to water to take items from on or near surface, making very little contact with water. Never swims. Forages in the same way over land, taking prey from beaches without landing. Also feeds by piracy, chasing other birds, forcing them to drop or disgorge their food.
Diet
Mostly fish. Feeds mainly on small fish, also squid, jellyfish, crustaceans. Takes hatchling turtles, young terns and other birds, sometimes eggs. Also scavenges for scraps around fishing boats, docks.
Nesting
Breeds in colonies, with nests often very close together. Perched males display (often in groups) by inflating throat pouch to huge red balloon, raising bill high, vibrating partially spread wings, swiveling back and forth, and calling. Females flying overhead are attracted to group, choose one male as mate. Nest: Site usually in mangroves, trees, or bushes 2-20' above ground or water, sometimes on ground. Nest (built mostly by female, with materials brought by male) a flimsy platform of sticks.
Climate Vulnerability
Conservation Status
Total population difficult to monitor; probably has declined at some tropical colonies. Although known as a common visitor to Florida since the 1800s, not confirmed breeding there until late 1960s (on Marquesas Keys). At the well-watched Dry Tortugas, did not begin nesting until 1988.
Climate Threats Facing the Magnificent Frigatebird
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