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The
Imperial Heron(Ardea insignis) is a heron that resides in parts of Bhutan, Bangladesh, India, Myanmar, and has even been seen in parts of Nepal. It is Critically Endangered and its population is decreasing mainly to its loss of wetland habitat.
Also known as the White-bellied Heron, this species is mostly dark gray, with white underparts. Its bill is black and greenish near its base. When disturbed, it usually giver out a croak.
Imperial is from Latin word
Imperium, meaning supreme power.