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Quiz estimate 11

From SibleyBirds

1. How many Black-bellied Whistling-Ducks?

Dendrocygna autumnalis HarlingenTX IMG 3522 2013-11-07 w.JPG
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→ The actual number is 134.

Image details: Black-bellied Whistling-Duck - Harlingen, Texas. 11/7/2013. . Image by David Sibley. link to image

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