What is "bar-headed goose"

The bar-headed goose (Anser indicus) is a goose that breeds in Central Asia in colonies of thousands near mountain lakes and winters in South Asia, as far south as peninsular India. It lays three to eight eggs at a time in a ground nest.

Vogel suggests that Bar-headed goose is likely to be Hamsa of Indian mythology. Dave suggests that Bar-headed goose is likely to be Kadamb in ancient and medieval Sanskrit literature, whereas Hamsa generally refers to swan.