Birdwatchers make significant findings Updated: Updated: Great knot, Indian skimmer among the species recorded during Asian Waterbird Census Share Article Great knot, Indian skimmer among the species recorded during Asian Waterbird Census The wetland experts from the Bombay Natural History Society (BNHS) and different parts of Andhra Pradesh on Wednesday recorded the avian diversity of the Godavari estuary, where they sighted three major species in a significant number -- endangered great knot (Calidris tenuirostris), endangered Indian skimmer (Rynchops albicollis) and Eurasian oystercatcher. Great knot and Indian skimmer species have been listed in the India's national action plan for conservation of migratory birds and their habitats (2018-23) in the Central Asian Flyway.