How is a mallard different from a blue winged teel?

Answer 1

They are different because the blue winged teel male and female look almost identical execpt that the male have a white stripe in front of its eye. Mallard male and females look different from each other and the males have green heads. The female mallard has a orange brown bill where as the blue winged teel female has a black bill.

Answer 2

Mallards have a distinctive green head, white neck ring, and chestnut-brown breast, while blue-winged teals have a blue and white patch on their wing and a distinctive white crescent near their eyes. Additionally, mallards are larger in size compared to blue-winged teals.