Owls are many and most of them are breeding in this sanctuary. Swifts & Swallows are come thousands during certain days and roost on telegraph & electric wires in and around the sanctuary. The sanctuary has a small breeding area of the crested tree swift.

The long distance migrants, warblers and fly catchers arrive first in the sanctuary , a large number of fly catchers use thattekkad as a transit point. A large population of Warbles stay back for a long duration.Wagtails like Forest wagtails , Grey wagtails, etc are some of the migratory species which stay for a long time.