VARIATION IN THE HAIRY WOODPECKER ( DRYO - 
BATES VILLOSUS AND SUBSPECIES). 
BY HUBERT O. JENKINS. 
This study was originally intended to be limited to the western 
forms of the Hairy Woodpecker but later it seemed desirable to 
include data that had accumulated concerning all of the forms. 
The number of adult specimens of each form examined was as 
follows: D. v. harrisi, 43; D. v. hyloscopus, 104; D. v. monticola, 
7; D. v. leucomelas, 9; D. v. villosus, 12, and D. v. auduboni, 3. 
This includes a large number of intermediates and does not include 
some 30 immature birds. 
|gj[ wish to thank Mr. Joseph Grinnell, Mr. W. K. Fisher, Prof. 
pointed tongue, while the Hairy Woodpecker, a stronger, hardier 
bird, occupies the mountainous districts and seems especially to 
love the pine forests. Many specimens indicate this by the telltale 
pitch left on their breasts. In the depth of winter it is found away 
up in the Boreal Zone of the Sierras, making the chips fly in search 
of its favorite food, undisturbed by the rigorous cold. However, 
it is not an abundant bird and is very shy of man. When you ap- 
proach, it sidles around on the other side of the limb and watches 
you with one eye and if it suspects injury in the least, is gone in a 
moment, swinging high over the tree tops uttering its shrill, quick 
peek, peek. 
As mentioned before, the Hairy Woodpecker differs more or less 
in different regions, and has consequently been split up into several 
subspecies or varieties by systematists, who recognized the differ- 
