Appendix. 



36. Saw-whet Owl; Nyctala acadica (Gmel.). 

 Length seven and a half inches. No ear tufts. 



Brown above spotted with white; below white, 



streaked with pinkish brown. A rather rare 



resident of the northern Sierra Nevada 

 Mountains. 



37. California Screech-Owl ; Megascops asio 

 bendirei (Brewst.). 



Length nine inches. Ear tufts visible. General 

 color gray, browner above, grayer below, mottled 

 and streaked with brownish and blackish lines. 

 A common resident of the valleys and foothills, 

 especially in the oak groves. 



38. Flammulated Screech-Owl; Megascops flam- 

 meolus (Kaup.). 



Length seven inches. General color gray, mottled 

 with blackish streaks; below white, streaked with 

 blackish; rufous edgings and white spots on the 

 wing coverings. This species is technically dis- 

 tinguished from the preceding by the absence of 

 feathers on the toes. A very rare species in the 

 Sierra Nevada Mountains. 



39. Dusky Horned Owl; Bubo vtrginianus satu- 

 ratus Ridgw. 



Nearly as large as the Great Gray Owl (length 

 twenty-four inches) from which it can be im- 

 mediately distinguished by its conspicuous ear 

 tufts. This is the common hooting owl of the 

 wooded regions. It is a dark western variety 

 of the great horned owl. Mottled and barred 

 brown, buffy, black and white. A white collar 

 on the throat. In southern California another 

 local race is recognized — the Pacific horned owl. 



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