Image: The Ultimate Bird Drawing Throwdown Showdown Graphic featuring images of David Sibley and H. Jon Benjamin

Join BirdNote tomorrow, November 30th!

Illustrator David Sibley and actor H. Jon Benjamin will face off in the bird illustration battle of the century during BirdNote's Year-end Celebration and Auction!

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American Robin Feeding Nestlings

© MaineNatureDiary

Watch as a parent American Robin feeds its nestling, then consume fecal sacs - a membrane that surrounds the feces - from several nestlings.  This is an adaptation in many passerine species that prevents fouling of the nests.