Distribution of avifauna on twenty-one islands of the Gulf of Mannar Biosphere Reserve, India.

Every research endeavour must start with closing the information gap about species distribution and biodiversity systematically. Even though enough avifaunal research has been done on the Gulf of Mannar, southeastern India, there have been limited studies about the avifauna from all 21 islands except two. Increasing species occurrence data on distribution from all the islands is highlighted for the future conservation plans for this Important Bird Area. We provide an updated and detailed checklist and distribution of bird groups for all islands individually from a sampling period of 2015-2022. A total of 96 bird species belonging to 34 families from 13 orders were recorded from all the islands; of which 58 species were waterbirds and other terrestrial ones. Of the 29 shorebird species recorded, one is Endangered and seven are Near Threatened by IUCN Red List. Some of the earlier recorded species, not seen in our survey, are not annotated as no record exists for the last decade. [ABSTRACT FROM AUTHOR]