. The birds of California : a complete, scientific and popular account of the 580 species and subspecies of birds found in the state. Birds; Birds. The Cassin Kingbird Distribution in California.âSummer resident of very local distribution in southern California, and west of the Sierran divide north to about Latitude 37 (Dos Palos, Merced Co., June 5, 1916, breeding). Winters sparingly in southern California and casually west to .Santa Barbara; formerly to Santa Cruz (Auct. J. G. Cooper). Authorities.âBaird, Rep. Pac. R. R. Surv., vol. ix., 1858, p. 174 (Sacramento Valley; Ft. Tejon; Colorado R
. The birds of California : a complete, scientific and popular account of the 580 species and subspecies of birds found in the state. Birds; Birds. The Cassin Kingbird Distribution in California.âSummer resident of very local distribution in southern California, and west of the Sierran divide north to about Latitude 37 (Dos Palos, Merced Co., June 5, 1916, breeding). Winters sparingly in southern California and casually west to .Santa Barbara; formerly to Santa Cruz (Auct. J. G. Cooper). Authorities.âBaird, Rep. Pac. R. R. Surv., vol. ix., 1858, p. 174 (Sacramento Valley; Ft. Tejon; Colorado R.); Bendire, Life Hist. N. Am. Birds, vol. ii., 1895, p. 249, pi. 1, figs. 18, 19 (eggs); Swarth, Pac. Coast Avifauna, no. 4, 1904, p. 20 (s. Ariz.; habits); Beal, U. S. Dept. Agric, Biol. Surv. Bull., no. 44, 1912, p. 22 (food); Dawson, Condor, vol. xviii., 1916, p. 27 (range in Calif.). SOME FOLKS are twins. Such being the case, birds, we suppose, have no right to expect exemption from the common lot. The penalty of being a twin consists, of course, in being forever confused, mis- identified, and misunderstood. The similarity be- tween Tyr annus vociferans and T. vertical is is exceedingly close,âso close, in fact, that it is doubtful if a hundred people in California, apart from self- conscious and fully alert bird students, ever stopped to consider that they might be different. Yet the two species are perfectly distinct in plumage â "-" and in voice, and somewhat so in habit and disposition. These likenesses and differences, in two related species which are closely associated throughout much of the year, form one of the most fascinating problems of intimate bird study which California offers. The voice is the key to the difference: Cassin's Kingbird says, Che bew', in a heavy, grumpy tone, whose last flick nevertheless cuts like a whip-lashâ chebeeu'. This is generically similar, but specifically very different from the evenly accented, and more nearly placid
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