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If You See a Bird with Leg Bands
Leg bands help biologists keep track of birds.
© USFWS - Pacific Southwest
If you see a wild bird with a small metal band around its leg, that means researchers have given the bird a unique ID to keep track of it over the course of its life. You can report the sighting to the Bird Banding Laboratory, a part of the U.S. Geological Survey that studies banded birds across the continent. Analyzing where and when banded birds are seen helps biologists figure out bird lifespans, migratory routes, and how their populations are changing.
BirdNote®
If You See a Bird with Leg Bands
Written by Conor Gearin
This is BirdNote.
[Trumpeter Swan calls]
If you see a wild bird with a small metal band around its leg, that means researchers have given the bird a unique ID to keep track of it over the course of its life.
Only bird banders with a permit are allowed to catch and band birds. Each species gets a band that’s just the right size for its legs — from tiny hummingbirds to massive swans.
If you see a banded bird, you can try and read off the serial code on the band with binoculars or a zoom lens. Then you can report the sighting to the Bird Banding Laboratory, a part of the U.S. Geological Survey that studies banded birds across the continent.
The lab has amassed tens of millions of banding records over the years. Analyzing where and when banded birds are seen helps biologists figure out bird lifespans, migratory routes, and how their populations are changing.
And that, in turn, can improve conservation efforts. Banding records helped raise the alarm about declines in Bald Eagle populations due to the pesticide DDT.
[Bald Eagle calls]
To learn more about bird banding, visit BirdNote dot org. I’m Michael Stein.
Support for BirdNote is provided by Jim and Birte Falconer from Seattle, Washington, and generous listeners around the world.
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Senior Producer: Mark Bramhill
Producer: Sam Johnson
Managing Editor: Jazzi Johnson
Managing Producer: Ariana Remmel
Content Director: Jonese Franklin
Bird sounds provided by The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology, Ithaca, New York. Trumpeter Swan ML133094 recorded by Geoffrey A. Keller, and Bald Eagle ML200943 recorded by Gerrit Vyn. BirdNote’s theme was composed and played by Nancy Rumbel and John Kessler.
© 2023 BirdNote January 2023 / June 2025
Narrator: Michael Stein
ID# banding-06-2023-01-27 banding-06
Conor Gearin
Writer
