Great Frigatebird
Great Frigatebird Overview
Known as 'iwa in the Hawaiian language, the great frigatebird is common in the Northwestern Hawaiian Islands, where it nests (it is not believed to nest in the main Hawaiian islands, but some birds roost on Moku Manu off the island of Oahu). Great frigate birds are large with a wingspan of 90 inches (229 cm). Wings are pointed and angular and they have a deeply forked tail.
Adult males are mostly black and have an inflatable red throat pouch that they use in courtship. Adult females are also mostly black, but with a white breast and throat. Breeding season is from March to May. One egg is typically laid in a nest composed of sticks and built in shrubs or low trees.
Frequently Asked Questions
Where can Great Frigatebirds be found in Hawaii?
They are common in the Northwestern Hawaiian Islands. While they don't typically nest on the main Hawaiian Islands, some individuals roost on Moku Manu off the coast of Oahu.
What does a Great Frigatebird look like?
They have a large wingspan (up to 90 inches), angular pointed wings, a deeply forked tail, and long hooked bill. Males are black with an inflatable red throat pouch; females have a white breast and throat.
What is the red pouch on the male used for?
The red throat pouch, or gular sac, is inflated by males during courtship displays to attract females during breeding season.
Where do Great Frigatebirds nest?
Nests are built in shrubs or low trees using sticks. Only one egg is laid per breeding season, which typically runs from March to May.
Why are frigatebirds also called 'iwa in Hawaiian?
'Iwa means “thief” in Hawaiian, referring to the bird's behavior of harassing other seabirds to steal their food mid-air, a practice known as kleptoparasitism.