The Superbly Adapted Osprey

BirdNote^® 
The Superbly Adapted Osprey 
Written by Bob Sundstrom

This is BirdNote.

         [Osprey call]

To the untrained eye, the Osprey looks just like a bird of prey should. Talons, hooked beak, vivid yellow eyes. But it also has some characteristics that make it truly unique among raptors. Especially when catching fish.

         [Osprey call]

In common with most raptors, it has four long toes — three in front and one in back. As the bird reaches for a fish, its outer front toe swivels to the rear, giving it two grasping talons front and back. And those toes are lined with short, stiff spikes for extra grip. The Osprey’s nostrils shut tight as it hits the water. Then as it ascends, it shakes itself off, shedding water easily thanks to its oily feathers. In fact, it’s the only raptor that has this oily plumage. Its long, slender, arched wings help the Osprey get clear of the water too, as it takes flight with the fish’s head facing the front — the most aerodynamically efficient position.

This Osprey we see today — just one species worldwide — has changed little since tens of millions of years ago, when its ancestors diverged onto a unique evolutionary track, distinct from eagles and hawks. Suggesting that over this period, it has remained particularly well suited to its environment. Thanks to these adaptations. 

For BirdNote, I'm Michael Stein.

Support for BirdNote is provided by Jerry Tone and Martha Wyckoff from Seattle, Washington — and generous listeners around the world. 

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Senior Producer: Mark Bramhill
Producer: Sam Johnson
Managing Producer: Jazzi Johnson
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Bird sounds provided by The Macaulay Library at the Cornell Lab of Ornithology, Ithaca, New York. Osprey [106651] recorded by R. Little.
BirdNote’s theme music was composed and played by Nancy Rumbel and John Kessler.
© 2016 BirdNote   March 2016/2021 & July 2026
Narrator: Michael Stein

ID#  OSPR-04-2016-03-04     OSPR-04