THE BIRD BOOK 
CREEPERS. Family CERTHIIDyE 
726. Brown Creeper. Certhia familiaris 
americana. 
Range. — Eastern North America, breeding 
from the northern tier of states northward; 
winters in the United States. 
These peculiar, weak-voiced Creepers are 
common in northern United States during the 
winter, when they may be seen slowly toiling 
up the tree trunks, searching the 
crannies of the bark for larvae. 
They make their nests behind 
loose hanking bark on old tree 
stubs, usually at low elevations, 
building them of twigs, bark, 
moss, etc., held together with 
cobwebs. The eggs, which are laid in May 
or June, are pure white, specked and spotted 
with reddish brown; they average in size .58 
x .48. The nests are most often found under 
the loosened bark on coniferous trees. 
726a. Mexican Creeper. Certhia familiaris albescens. 
Range. — Western Mexico north to southern Arizona. 
The nesting habits of this brighter colored form are the same as those of 
the others. 
White 
Brown Creeper 
726b. Rocky Mountain Creeper. Certhia familiaris montana. 
Range. — Rocky Mountains, breeding from New Mexico to Alaska. 
The eggs of this grayer variety cannot be distinguished from those of the 
eastern birds and the nests are in similar situations. 
726c. California Creeper. Certhia familiaris occidentalis. 
Range. — Pacific coast from southern California north to Alaska. 
An abundant species, especially on mountatin ranges, breeding behind the 
Lark chiefly on pine trees. The eggs are not different from those of the others. 
726d. Sierra Creeper. Certhia familiaris zelotes. 
Range.- — Sierra Nevada Mountains in California and the Cascade Range in 
Oregon. 
Very similar to the last and with the same habits; eggs indistinguishable. 
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