Southern Myanmar (Tenasserim) and adjacent western Thailand.
 
Population
Estimated population is unknown (2011) and decreasing.
Status NT
Habitat loss through logging and agricultural conversion is the main threat. Hunting and trapping may also be a problem.
For more information see BirdLife International Species Factsheet.
Tickell's Brown Hornbill (Anorrhinus tickelli) [XC348919]
by Jelle Scharringa from Thi Nuey Station, Thung Yai Naresuan Wildlife Sanctuary, Thailand (call)
Tickell's Brown Hornbill (Anorrhinus tickelli) [XC165417]
by Gareth K. from Kaengkrachan, 2nd stream, Petchaburi, Thailand (call)
Subspecies
Anorrhinus tickelli (Sibley and Monroe 1990, 1993) has been split into Tickell's Brown Hornbill (Anorrhinus tickelli) and Austen's Brown Hornbill (Anorrhinus austeni) following Rasmussen and Anderton (2005).
Forms superspecies with Austen's Brown Hornbill (Anorrhinus austeni) and are often considered conspecific, but differ in some features of plumage and in presence or absence of sexual dimorphism in bill colour.