Great barbet

The great barbet ("Psilopogon virens") is an Asian barbet native to the Indian sub-continent and Southeast Asia, where it inhabits foremost forests up to altitude. It has been listed as Least Concern on the IUCN Red List since 2004 because of its wide distribution.
Taxonomy.
"Bucco virens" was the scientific name proposed by Pieter Boddaert in 1783 for a great barbet that had been described by Georges-Louis Leclerc, Comte de Buffon in 1781 based on a specimen collected in China. It was illustrated in a hand-coloured plate engraved by François-Nicolas Martinet.
It was placed in the genus "Megalaima" proposed by George Robert Gray in 1842 who suggested to use this name instead of "Bucco". In the 19th and 20th centuries, the following great barbet zoological specimens were described:
Molecular phylogenetic research of barbets revealed that the birds in the genus "Megalaima" form a clade, which also includes the fire-tufted barbet, the only species placed in the genus "Psilopogon" at the time. Barbets formerly placed in this genus were therefore reclassified under the genus "Psilopogon".
Four great barbet subspecies are recognised as of 2014:
Results of a phylogenetic study of Asian barbets indicate that the great barbet is most closely related to the red-vented barbet ("P. lagrandieri") occurring in Cambodia, Laos and Vietnam.
Description.
The great barbet has a blue head, large yellow bill, brown and green-streaked body, belly and a red vent. The plumage is green. It is the largest barbet species with a body length of and a weight of .
Distribution and habitat.
The great barbet is a resident breeder in the lower-to-middle altitudes of the Himalayas, ranging across northern India, Nepal and Bhutan, Bangladesh and some parts of Southeast Asia, as far away as Laos.
Behaviour and ecology.
The great barbet's nesting season is from April to July. It typically builds nests in tree holes. Both male and females take care of the young. Its diet consists mainly of fruits and insects.
The male's territorial call is a very loud '. The alarm is a harsh ', and another call is a repetitive "".