Chestnut Teal female - Anas castanea

The Chestnut Teal is a small dabbling duck with a high forehead and rounded head. Males are distinctive, having a glossy green head, chestnut brown neck, breast and flanks, dark brown upper body and wings, and a black undertail with contrasting white patch. Females are mottled dark brown and grey, with a pale throat streaked brown and a dark eye stripe. In both sexes the eye is a deep red, the bill is blue-grey and the legs and feet are green-grey. The wings have a dark glossy green to purple speculum (panel) edged white and the underwing is brown, with white wing pits.

https://australian.museum/learn/animals/birds/chestnut-teal/