Two new owls from Arizona
Subtitle: with description of the juvenal plumage of Strix occidentalis occidentalis (Xantus)
By: by Harry S. Swarth.
Series: University of California publications in zoology,; v. 7, no. 1
Publisher: The University press
Published: 1910
Place of publication: Berkeley
Language: eng
Subjects: Owls -- Arizona.; California spotted owl.; Feathers.
Notes: "Literature cited": p. 8.
Cover title.