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Gray Camouflage: Dippers and Female Harlequin Ducks

Sometimes it pays to be gray
© Kevin Faccenda CC View Large

For some birds that nest along western streams — including American Dippers and female Harlequin Ducks, like this one — the best way to remain inconspicuous is to hide in plain sight—by looking like just another wet, gray stone. The female Harlequin, resting atop a boulder, is master of camouflage, blending in with the drab background.

This show made possible by the Bobolink Foundation.

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Transcript: 

BirdNote®   

Gray Camouflage: Dippers and Female Harlequin Ducks

Written by Bob Sundstrom

This is BirdNote.

[sound of a rushing stream; continue in background]

A mountain stream tumbles through a canyon in the West, its clear waters coursing among gray stones and boulders.

[American Dipper song, https://macaulaylibrary.org/asset/8989 , 0.22-32]

For some birds that nest along these streams, the best way to remain inconspicuous is to hide in plain sight—by looking like just another wet, gray stone.

[American Dipper song, https://macaulaylibrary.org/asset/8989 , 0.22-32]

Birds like this American Dipper, singing from a flat-topped stone in the middle of the rushing stream. Plump, short-tailed, and a bit smaller than a starling, the slate-gray dipper is such a close match to the wet stones that it takes a keen eye and a lot of patience to spot it.

Nearby, resting atop a boulder in the stream, is another master of camouflage: a female Harlequin Duck. Male Harlequins are pretty flashy, but females are stone-gray and, if anything, even better camouflaged than the dippers.

[Harlequin Duck squeaky call, https://macaulaylibrary.org/asset/38919261 , 0.01-.03]

The female Harlequin has three irregular spots of white on each side of her head. She’s a perfect match for a stone in the stream that has been marked by some…[pause] whitewash left behind by an earlier bird visitor.

Many American Dippers remain year-round on these streams, always among the stones. Sometimes, when you live in the middle of a rocky mountain river, it pays to be gray.  

[dipper sound]

For BirdNote, I’m Michael Stein.

Today’s show brought to you by the Bobolink Foundation.


###
Bird sounds provided by The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology, Ithaca, New York. Recorded by Randolph Little and Phil Green.
BirdNote’s theme composed and played by Nancy Rumbel and John Kessler. Other effects in this episode include Nature Sound Essentials "#20 River".
Producer: John Kessler; Managing Producer: Jason Saul; Editor: Ashley Ahearn; Associate Producer: Ellen Blackstone; Assistant Producer: Mark Bramhill.
© 2019 Tune In to Nature.org   March 2019   Narrator: Michael Stein
 
ID# AMDIHADU-01-2019-03-28    AMDIHADU-01

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