Which Birds Are Expert Climbers?
Woodpeckers and nuthatches prove that there's more than one way to climb a tree.
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No bird is better adapted for climbing up a tree trunk than a woodpecker. Its foot design is ideal for clinging, with two toes pointing forward and two back. Relatively short legs mean it can anchor itself securely. And the spiky central feathers in its long, stiff tail dig into the bark, bracing the bird against the tree while climbing. So when traveling upward, the woodpecker’s a master. Hitching down? Not so much—usually they’ll fly.
Nuthatches are also expert climbers, but they can easily go up and down. A nuthatch’s tail is shorter than a woodpecker’s, but its legs are longer and very strong. It walks over the bark by grasping it with one leg while using the other for a prop. And it has a rear-facing toe equipped with a long, sharp claw that’s ideal for hanging on while heading downward.
One way these different climbing adaptations play out: Primarily, nuthatches search for insects in the crevices of bark while climbing down, while woodpeckers forage as they climb up. So one sees prey that the other doesn’t.
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Bird sounds provided by The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology, Ithaca, New York.
Sources include: The Sibley Guide to Bird Life & Behavior; http://www.hiltonpond.org/ThisWeek071115.html.
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© 2015 Tune In to Nature.org September 2015 Narrator: Mary McCann