The genus Tichodroma contains only the well-known Wall-Creeper, which is found as a winter visitor to the Himalayas and more rarely to the neighbouring plains.
The Wall-Creeper, in addition to a complete autumn moult, has a partial one in the spring by which the colour of the chin and throat is changed. The sexes are said to differ slightly from each other in summer, but I have not been able to examine summer-plumaged females. The young birds resemble the adults in winter plumage very closely, but they have more spots on the wings, and these of a rufous colour instead of white, and they have less crimson on the wing.
Tichodroma has a very long, slender, and almost straight bill, longer than the head, and the nostrils are long narrow slits. The wing is extremely large, but rounded, not pointed, the first primary being about half the Length of the second, and the second and third falling short of the tip of the wing. The tail, composed of twelve soft feathers, is about half the Length of the wing, and rounded very slightly. The tarsus is smooth, and the hind claw longer than its toe.