The yellow bittern (Ixobrychus sinensis) is a small bittern. It is of Old World origins, breeding in the northern Indian Subcontinent, east to the Russian Far East, Japan and Indonesia. It is mainly resident, but some northern birds migrate short distances. It has been recorded as a vagrant in Alaska and there is a single sighting in Great Britain, from Radipole Lake, Dorset on November 23, 1962 – however, the British Ornithologists’ Union has always considered this occurrence to be of uncertain provenance and currently it is not accepted onto the official British List.

This is a small species at 36 to 38 cm (14 to 15 in) in length, with a short neck and longish bill. The male is uniformly dull yellow above and buff below. The head and neck are chestnut, with a black crown. The female’s crown, neck and breast are streaked brown, and the juvenile is like the female but heavily streaked brown below, and mottled with buff above. Yellow bitterns feed on insects, fish and amphibians.

Source: Wikipedia