Brown Creeper,Certhia americana. (Fig. 11.32) Male length 4 1/2 in (11.75 cm), female length 4 3/4 in (12 cm); male weight 3/10 oz (8 g), female weight 3/10 oz (7.9 g). Uncommon permanent resident in the White-Inyo Range; recorded from 7,700 to 10,000 ft (2,350 to 3,200 m).
Brown Creepers inhabit Subalpine Forest of Limber Pine, Bristlecone Pine, and Lodgepole Pine and woodlands of large Singleleaf Pinyon. They prefer mature timber in fairly dense stands for both foraging and nesting. These birds are excellent climbers, spiraling up tree trunks while probing into bark fissures for insects with their long, decurved bills. Their pale white throats may aid in reflecting light into these dark cracks. After attaining a certain height in the tree, creepers drop to the base of the same or another tree and continue their foraging. Brown Creepers nest in crevices or spaces underneath slabs of loosened tree bark. Although the back is camouflaged and resembles bark, the species can be detected by its constant movement. Reference: C. Davis (1979).