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Photo: JJ Harrison · CC BY-SA 3.0 (May be cropped or resized)
Botaurus flavicollis
Also known as: Ixobrychus flavicollis
Range
Tropical Asia from Pakistan, India, Bangladesh and Sri Lanka east to China, Indonesia and Australia
Size
54–66cm
The black bittern is a medium-sized bittern, 54–66 cm long, of Old World origin, breeding in tropical Asia from Pakistan, India, Bangladesh and Sri Lanka east to China, Indonesia and Australia. It is mainly resident, but some northern birds migrate short distances. It has dark upperparts, and was formerly placed in the genus Ixobrychus (Wikipedia, general species account).