14 
Nice, Margaret Morse, and Leonard, Blaine 
1924. “The Birds of Oklahoma;” Univ. of Okla. Bull., New Series, No. 20. 
Borealis resident in northeastern and calurus in western Oklahoma. 
Peabody, P. B. 
1908. “ Krideri the Fearless;” Warbler, vol. IV, pp. 1-8 (1908). 
Description of nest and young in Wyoming. 
Preble, Edward A. 
1902. “A Biological Investigation of the Hudson Bay Region;” N. A. Fauna No. 22, 
Division of Biol. Surv., Washington. 
All birds referred to borealis. 
1908. “A Biological Investigation of the Athabaska-Mackenzie Region;” N. A. 
Fauna No. 27, Bureau of Biol. Surv., Washington. 
Refers all birds to calurus. 
Ridgway, 
1880. 
1880. 
1884. 
1885. 
1887. 
1890. 
1923. 
Robert 
“On Six Species of Birds New to the Fauna of Illinois, with Notes on Other 
Rare Illinois Birds;” Bull. Nutt. Ornith. Club, vol. V, pp. 30-32. 
Reports B. harlani from Illinois, Mar., 1879. 
“Description of an Unusual (?) Plumage of Buteo harlani Bull. Nutt. Ornith. 
Club, vol. V, pp. 58-59. 
Description of specimen from Gainsville, Texas, March 3, 1879, with 
much white on breast, throat, and head. 
“On the Possible Specific Identity of Buteo cooperi Cass, with B. harlani 
(Aud.);” Auk, vol. I, pp. 253-254. 
“On Buteo harlani (Aud.) and B. cooperi Cass.;” Auk, vol. II, pp. 165-166. 
Decides that Buteo harlani has a light phase, but that it is probably not 
conspecific with B. cooperi. 
“A Manual of North American Birds;” J. B. Lippincott Co., Philadelphia. 
“Harlan’s Hawk a Race of the Red-tail, and Not a Distinct Species;” Auk, 
vol. VII j p. 205. 
Describing a bird with a borealis body and a harlani tail. Reduces harlani 
to a subspecies of B. borealis. 
“What is Buteo rufescentior Salvin and Godman;” Auk, vol. XL, p. 325. 
In answer to question (Griscom, 1922) decides bird in question is richly 
coloured calurus. 
Rockwell, R. B., and Wetmore, Alex. 
1914. “A List of Birds from the Vicinity of Golden, Colorado;” Auk, vol. XXXI, 
pp. 309-333. 
Calurus occasional spring and autumn. 
Saunders, Aretas A. 
1921. “A Distributional List of the Birds of Montana;” Pacific Coast Avifauna, 
Number 14, Cooper Ornithological Club, Berkeley. 
Calurus given as common breeder with occasional occurrence of Krideri 
and one nesting record. 
Sharpe, R. Bowdler 
1874. “Catalogue of the Accipiters or Diurnal Birds of Prey in the Collection of the 
British Museum,” p. 191. 
Detailed description of supposed original type specimen. 
SlLLOWAY, P. M. 
1901 . “Summer Birds of Flathead Lake;” Bull, of Univ. of Montana, No. 1. 
Calurus only race recorded. 
1903. “Birds of Fergus County, Montana;” Argus Press, Lewiston, Mont. 
Calurus only race recorded. 
Simmons, Geo. Finlay 
1925. “Birds of the Austin Region;” Univ. of Texas. 
Borealis given as the normal form and a single record for calurus cited. 
Swann, H. Kirke 
1926. Monograph of the Birds of Prey, part VI, pp, 389-95. 
Description and discussion of all recognized subspecies of Buteo borealis. 
Accepts without question a breeding record for harlani in Texas. 
