Quiz estimate 13

From SibleyBirds

1. How many Double-crested Cormorants?

EasthamMA IMG 1520 2014-09-20 w.JPG
Enter your answer here:
→ The actual number is 21.

Image details: Double-crested Cormorant - Eastham, Massachusetts. 9/20/2014. . Image by David Sibley. link to image

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