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Bonaparte's Gull Chorus-line

A smorgasbord of shrimp!
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Bonaparte's Gulls feeding
© Rick Fridell

Small, tern-like Bonaparte's Gulls often form a chorus-line at the water's edge. Side by side, in half an inch of water, they stomp their feet as fast as they can. Under this pummeling, a smorgasbord of shrimp is stirred up for the gulls to harvest. Is this a learned behavior, or were these gulls born knowing how to forage cooperatively? Who knows? But it's hard to imagine a more nutritional dance routine!

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BirdNote®

The Bonaparte’s Gull Chorus-line

Written by Chris Peterson

This is BirdNote!

[Excerpt from Can-Can]

The tide is part way out. Bonaparte’s Gulls, one of North America’s smallest, have formed a chorus-line at the water’s edge. Side by side, in half an inch of water, they’re stomping their feet as fast as they can. This stirs up an abundance of tiny marine invertebrates, including a smorgasbord of shrimp. [Calls of several Bonaparte’s Gulls]

Is this a learned behavior, or are the gulls born knowing how to forage cooperatively? Most likely, it’s innate, but no one knows for certain.

The Bonaparte’s Gulls have returned from the boreal forest of the north where they nest in trees. Trees? Yes, they’re the only gull that regularly does that. Now, as they migrate south through the Mississippi flyway and along both coasts, they’re amassing in large flocks. [Calls of several Bonaparte’s Gulls]

The head of the adult is still black – like a vanilla cone that’s been dipped in very dark chocolate. But soon, it will begin a gradual transition back to the white head of winter. [Call of a single Bonaparte’s Gull]

This one gull you’re never going to see in a garbage dump. Bonapartes find food in several ways, but not by picking through trash. Why should they, when they have such a nutritional dance routine! [Repeat chorus-line music]

To share today’s show with a friend, begin at our website, birdnote.org. [Go out with the Can-Can]

###
Bird sounds provided by The Macaulay Library at the Cornell Lab of Ornithology, Ithaca, New York. Calls of the flock [59221] recorded by W.W.H. Gunn, single adult [105798] by G.A. Keller.
Musical selection from “Can-Can” Gaite Parisienne, Jacques Offenbach composer.
BirdNote’s theme music was composed and played by Nancy Rumbel and John Kessler.
Producer: John Kessler
Executive Producer: Chris Peterson
© 2015 Tune In to Nature.org   August 2015   Narrator: Michael Stein
ID#082408BOGUKPLU  BOGU-01b

Chris Peterson
Writer
Michael Stein
Narrator
Rick Fridell
Photographer
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Related Resources

Bonaparte's Gull – More at the Audubon Guide to North American BirdsLearn more about the Bonaparte's Gull

More About These Birds

Bonaparte's Gull (Chroicocephalus philadelphia)

Chroicocephalus philadelphia

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