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Males appear all black from below with small white underwing "armpits" (spurs). Females have white belly patch, but less extensive than in Christmas Frigatebird females. In flight, it has a deeply forked tail and long pointed wings.

Abundance
Rare

Chinese Name
白斑军舰鸟

Habitat
Wetland

Malay Name
Burung Simbang Kecil

Tamil name
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