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White-bellied heron
The white-bellied heron (''Ardea insignis''), also known as the imperial heron or great white-bellied heron, is a species of large heron found in the foothills of the eastern Himalayas in India, northeastern Bangladesh, Burma and Bhutan. Additionally, there are records from Nepal. It is mostly dark grey with a white throat and underparts. This heron is mostly solitary and is found on undisturbed riverside or wetland habitats. The global population has declined and the species is threatened by disturbance and habitat degradation. The species is currently listed as Critically Endangered by the IUCN.
==Taxonomy and systematics==
This heron was first noted as the "great Indian heron" in JE Gray's ''Zoological Miscellany'' of 1844 based on Brian Houghton Hodgson from Nepal. Allan Octavian Hume noted its distinctiveness and pointed out the differences between it and ''Ardea sumatrana''. The alternate name of ''Ardea imperialis'' was suggested by Stuart Baker, since Hodgson's name was a ''nomen nudum'' and this was used in ''Peters' check-list''. This was used until 1963, when Biswamoy Biswas commented on Sidney Dillon Ripley's synoptic list and noted that ''Ardea insignis'' Hume should be used, since its citation as a synonym of ''Ardea nobilis'' Blyth and ''Ardea sumatrana'' Raffles was based on misidentification.
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