Carol Inskipp has carried out extensive bird survey work across the Indian subcontinent since her first visit in 1977, collaborating closely with Nepali ornithologists and contributing to publications including the National Nepal Bird Red List. Together with Richard Grimmett and Tim Inskipp, she is among the foremost authorities on the birds of the region. Birds of Bhutan and the Eastern Himalayas is the definitive field guide to 809 species across Bhutan, Sikkim, and Arunachal Pradesh.