Life histories of North American woodpeckers

by Arthur Cleveland Bent

1930. The breeding birds of central Lower California. Condor, vol. 32, pp. 20-49.

Bangs, Outram.

1898. Some new races of birds from eastern North America. Auk, vol. 15, pp. 173-183.

1900. A review of the three-toed woodpeckers of North America. Auk, vol. 17, pp. 126-142.

1910. A new race of the pileated woodpecker. Proc. New England Zool. Club, vol. 4, pp. 79-80.

Barrows, Walter Bradford.

1912. Michigan bird life.

Batchelder, Charles Foster.

1889. An undescribed subspecies of Dryobates pubescens. Auk, vol. 6, pp. 253-255.

1908. The Newfoundland hairy woodpecker. Proc. New England Zool. Club, vol. 4, pp. 37-38.