26 PACIFIC COAST AVIFAUNA No. 10 



96. Buteo swainsoni Bonaparte. 



SWAIN SON HAWK. 



Synonyms Buteo bairdi; Btitco insignatus; Bntco o.vyptcrns. 



Status An abundant summer visitant on the plains in extreme southeastern 

 Arizona (Tucson, Fort Grant, Fort Huachuca, etc.) ; also found breeding near 

 Yuma (Brown, 1903, p. 44). During the migrations it is more widely distribut- 

 ed. Has not been observed in Arizona during the winter months. 



97. Buteo albicaudatus sennetti Allen. 

 SENNETT WHITE-TAILED HAWK. 



Status A nest found by G. F. Breninger between Florence and Red Rock 

 in 1897, and a male bird taken by the same collector at Phoenix in the spring of 

 1899 (1899^ p. 352). Not otherwise observed in Arizona. 



98. Urubitinga anthracina (Lichtenstein). 



MEXICAN BLACK HAWK. 



Status The only breeding record is from the vicinity of Fort Verde, in 

 central Arizona (Mearns, i886a, p. 60). Other points at which the species has 

 been observed are Forts Bowie, Lowell, and Huachuca. Its occurrence at Fort 

 Bowie in February (Fowler, 1903, p. 70) indicates that it remains throughout 

 the year in some parts at least of southern Arizona. 



99. Asturina plagiata Schlegel. 



MEXICAN GOSHAWK. 



Synonyms Asturina nitida; Asturina nitida plagiata. 



Status The center of its abundance in Arizona seems to be the valley of 

 the Santa Cruz River, where it is not uncommon during the summer months. It 

 has also been found breeding on Rillito Creek (a tributary of the Santa Cruz), 

 in the foothills of the Santa Rita Mountains, on the San Pedro River, and, the 

 westernmost record, on the Gila River in the vicinity of Gila Bend (Pember, 

 1892, p. 53). 



100. Archibuteo lagopus sancti-johannis (Gmelin). 



AMERICAN ROUGH-LEGGED HAWK. 



Synonym Archibuteo lagopus. 



Status A specimen taken by Coues ( i866a, p. 48) at Fort Whipple in the 

 winter of 1865. Henshaw (i875a, pp. 163, 164) cites Bendire as having met 

 with the species at Tucson in winter. 



101. Archibuteo fernigineus (Lichtenstein). 

 FERRUGINOUS ROUGH-LEGGED HAWK. 



Status Coues (i866a, p. 46) found this species abundant in winter in the 

 vicinity of Fort Whipple. Fisher (18933, p. 91) records a specimen taken at 

 Fort Verde in December. The few other Arizona records are either of doubtfully 

 identified birds, or else are not explicit statements of the place or manner of oc- 

 currence. It has not been found breeding in Arizona. 



