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Photo: JJ Harrison · CC BY 3.0 (May be cropped or resized)
Botaurus sinensis
Also known as: Ixobrychus sinensis
Range
Northern Indian subcontinent, east to the Russian Far East, Japan and Indonesia
Size
36–38cm
The yellow bittern is a small bittern of Old World origins, 36–38 cm long with a short neck, that breeds in the northern Indian subcontinent east to the Russian Far East, Japan and Indonesia. It is mainly a resident bird, but some northern birds migrate short distances, and it has been recorded as a vagrant in Alaska (Wikipedia, general species account).