This species is listed as Vulnerable in the IUCN Red List of Threatened Species (https://www.iucnredlist.org/).

 

This is also known as the Common Grey Hornbill.
 

This is also known as the Godwin Austen's Brown Hornbill and White-throated Brown Hornbill.
 

This species is listed as Near Threatened in the IUCN Red List of Threatened Species (https://www.iucnredlist.org/)

 

This is also known as the Great Pied Hornbill and Great Indian Hornbill.
 

This species is listed as Near Threatened in the IUCN Red List of Threatened Species (https://www.iucnredlist.org/)