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Oxbow Lakes Are Often Rich With Birdlife

Head out to a national wildlife refuge this weekend
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White Pelicans
© Blake Boyd

Many birds look for islands when they want to find a great nesting site, because islands are often protected from mammalian predators. Some of the best places to find islands are oxbow lakes, like many of the ones protected by the National Wildlife Refuge System.

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BirdNote®

Oxbow Lakes

Adapted from a script by Gordon Orians

This is BirdNote.

[Calls of Ring-billed Gulls and American White Pelicans]

When Ring-billed Gulls or American White Pelicans are ready to build a nest and raise their young, they look for an island. Islands provide protection from predators, like mammals.

[Continue Ring-billed Gull calls]

Some of the best islands can be found near large rivers, slowly meandering through flat country. When a river winds through a landscape, it sometimes creates wide “U” shapes, or “oxbows.” But when the river changes course, those oxbows can get cut off from the main flow of the river. It creates what’s called an “oxbow lake.” The name comes from the curve of the yoke placed on oxen to draw a plow.

[Calls of Ring-billed Gulls and American White Pelicans]

Birds love oxbow lakes. At Bowdoin [buh-DOYN] National Wildlife Refuge in eastern Montana you’ll find an oxbow lake teeming with bird life. The lake used to be part of the Missouri River. Now, large numbers of Ring-billed, Franklin’s, and California gulls, American White Pelicans, Double-crested Cormorants and White-faced Ibises breed on an island in the middle of the lake.

These birds forage over hundreds of square miles and come home to nest in safety on the islands here.

[Lapping of water of the lake]

We’re fortunate that many important oxbow lakes are protected by our National Wildlife Refuge System. Why not head out and explore some of these special places for yourself?

For BirdNote, I’m Mary McCann.

###

Producer: John Kessler

Managing Producer: Jason Saul

Editor: Ashley Ahearn

Associate Producer: Ellen Blackstone

Assistant Producer: Mark Bramhill

Narrator: Mary McCann

Bird sounds provided by The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology, Ithaca, New York. Ring-billed Gull 3334 recorded by R.S. Little; American White Pelican 1985 by R.S. Little.

© 2019 BirdNote     June 2014 / 2019

ID# oxbowlake-01-2012-06-24          oxbowlake-01b
 

Gordon Orians
Writer
Michael Stein
Narrator
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Tagsshorebird fresh water

Related Resources

Learn more about Bowdoin National Wildlife RefugeAmerican White Pelican - More at All About BirdsMore about Globally Important Bird AreasWestern Hemisphere Shorebird Reserve Network

More About These Birds

American White Pelican (Pelecanus erythrorhynchos)

Pelecanus erythrorhynchos

Sights & Sounds

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