The presence of Ruddy Shelduck (Tadorna ferruginea) from Arunachal
Pradesh is known so far but there was no information on the breeding ecology of this species from the high altitude wetlands of western Arunachal
Pradesh. So, far in India eastern Ladakh and Sikkim is the only two
known high altitude breeding site of this species in conjunction with
selected sites in Nepal and Bhutan (BirdLife International, 2011).
Arunachal Pradesh, WWF-India team has done the first photographic and
videographic documentation of a breeding pair of Ruddy shell duck along
with 7 ducklings on 29th June 2011 from Tsomgo Ama wetland situated at
an altitude of 4535 m altitude covering an area of 0.27 sq. km. within
Thembang Bapu Community Conserved Area Wetland Complex, West Kameng district.