You, intent on your task, and I, on the law
Of your wonderful head and gymnastic claw!
The Woodpecker well may despair of this feat—
Only the fly with you can compete.
So much is clear; but I fain would know
How you can so reckless and fearless go,
Head upward, head downward, all one to you,
Zenith and nadir the same to your view.
—Edith M. Thomas, in Bird-Lore.
Even the woodpeckers, supplied, as they are, with a reversed toe and a stiff, supporting tail, cannot compete with the Nuthatches in descending head first. The Woodpecker, in going down the trunk, finds itself in the same predicament as the bear,—its climbing tools work only one way. It is dependent on its stiff tail for support, and so must needs hop down backwards. The Creeper is still more hidebound in its habits, and its motto seems to be “Excelsior.” It begins at the foot of its ladder, and climbs ever upwards. But the climbing ability of the Nuthatch is unlimited. It circles round the branches, or moves up, down, and around the trunks, apparently oblivious to the law of gravitation. Its readiness in descending topsyturvy is due, in part, to the fact that, as the quills of its tail are not stiff enough to afford support, it is obliged to depend upon its legs and feet. As it has on each foot three toes in front and only one behind, it reverses the position of one foot in going head downward, throwing it out sidewise and backward, so that the three long claws on the three front toes grip the bark and keep the bird from falling forward. The other foot is thrown forward, and thus, with feet far apart, the “little gymnast has a wide base beneath him.” The Nuthatch not only straddles in going down the tree, but spreads its legs widely in going around the trunk, but bird artists generally seem to have overlooked this habit. The slightly upturned bill of the Nuthatch, and its habit of hanging upside down, give it an advantage when in the act of prying off scales of bark, under which many noxious insects are secreted.