Quiz estimate 143

From SibleyBirds

1. How many black birds?

ConcordMA IMG 7153 2015-10-21 w.JPG
Enter your answer here:
→ The actual number is 31.

Image details: Common Grackle, European Starling stonei, versicolor - Concord, Massachusetts. 10/21/2015. . Image by David Sibley. link to image

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