Spot-billed ducks: Filtering and foraging.

The spot-billed ducks were scraping algae on the concrete and filtering only the algae in their mouths. As they did so, water was pouring out of both sides of its bill. Birds of the duck family have a clever mechanism. You can see the mechanism in the swan. Visit the next site. ⇒ http://wakatsuk.blog68.fc2.com/blog-entry-94.html

43 thoughts on “Spot-billed ducks: Filtering and foraging.”

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