Joseph Grinnell

“ Within this general area the Mountain Chickadee is by no means uniformly distributed. [506] Especially towards the south is its range very "spotty," the representations on detached mountain tops being wholly isolated. Two main areas of relatively continuous distribution are, however, perceivable--the Rocky Mountain area, and the Sierra Nevada area. ”

“ Neither depth of bill nor culmen is a practical index to degree of slenderness of bill. No ordinary method of measurement will suffice to indicate the facts as they are perceived by the eye.
As will be seen by the dates in the tables, as a rule only unworn specimens have been selected for measurement. ”

“ Fresh-plumaged fall specimens from this locality would make determination more certain.
A specimen (♂, no. 547, Mus. Vert. Zool.) from Anthony, Baker County, Oregon, taken October 16, 1907, might be referred to P. g. abbreviatus; but the tone of color of back and sides is much darker than usual in that form. It is certainly much darker than in P. g. inyoensis. Its tail is but 65.3 mm. long. A skin (♀, no. 18, Morcom coll.) from Camp Harney, Harney County, Oregon, February 17, 1875, has a tail length of 67.7 mm., and in depth of color is about intermediate between abbreviatus and P. g. gambeli. ”

“ Type locality.--Horse Creek, Siskiyou Mountains (near Seiad Valley P. O.) , Siskiyou County, California. Type, male, no. 119 (orig. no., in coll. J. Grinnell) ; December 12, 1901; collected by Malcolm P. Anderson.
Diagnosis.--Tone of color on sides, flanks and back the same as in inyoensis, though not quite so pale, namely, in fresh plumage, cartridge buff. Tail (see figs. 2, 3) much shorter than in either gambeli or inyoensis; and bill averaging smaller than in any of the other three races. ”

“ Mono County: Warren Fork of Leevining Creek, 9200 ft., 1; Williams Butte, 7500 ft., 1. Fresno County: Bullfrog Lake, 10,600 ft., 6. Inyo County (not typical) : near Kearsarge Pass at 8500 ft., 1; Little Onion Valley, 7500 ft., near Kearsarge Pass, 1; Cottonwood Lakes, 11,000 ft., 7. Tulare County (not typical) : Whitney Creek, 11,000 ft., 3; Whitney Meadows, 9800 ft., 14; Olancha Peak, 10,000 ft., 1.
Nevada: Pine Forest Mts., Humboldt County, 13.
Penthestes gambeli baileyae (Grinnell)
Bailey Mountain Chickadee
Parus montanus, of authors, part. ”

“ Wing, 69.7 mm.; tail, 65.0; exposed culmen, 7.9; depth of bill at base, 3.8. For extremes, see accompanying table.
Range.--The higher mountains of central and northern California, southern Oregon (probably this subspecies) , and northwestern Nevada. Occurs west in northern California through the Siskiyou and Salmon mountains and to South Yolla Bolly Mountain and Mount Sanhedrin; and south in the Sierra Nevada to the vicinity of Mount Whitney. Specimens examined, 182, from the following localities:
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California: Modoc County: Sugar Hill, 4; Warner Mts., 27. Siskiyou County: Mt. Shasta, 3 ”