3 ° 
Brewster on a Collection of 1 Arizona Birds. 
[January 
144. Accipiter cooperi Bonap. Cooper’s Hawk. — This 
Hawk was occasionally seen during Mr. Stephens’s visit to the 
Santa Rita Mountains. On May 18 a nest was found in the 
fork of a green oak at a height of about thirty feet. It had 
apparently been used several seasons. The eggs, which were 
slightly incubated, measure respectively 1.92X1*41 5 1.93X1-42; 
1.91X1.40; 1.92X1.40. The parent birds were exceedingly shy, 
but one of them was finally killed with a rifle-ball. 
406, $ ad., Santa Rita Mountains, May 18. Length, 16.70; extent, 30; 
wing, 9.38; tail. 8.44. “Iris brownish-red; cere, greenish-blue; legs, 
greenish-yellow. Taken with set of four eggs.” 
This specimen is absolutely indistinguishable from some of my Massa- 
chusetts examples. 
145. Buteo abbreviates Caban. Zone-tailed Hawk. — 
This fine Buteo was met with only at Tucson, where three speci- 
mens were taken. Of the first Mr. Stephens writes: “I was 
standing on a dam that crossed the river at the head of an irri- 
gating ditch, when below me a Vulture, as at the time I supposed 
.it to be, attempted to catch some minnows in a shallow place, 
fluttering over the water and trying to snatch up the little fish 
with its feet. Failing in this it alighted on the dam near me when 
I fired and killed it.” This occurred in April. Later in the 
season (June 7) a fine adult pair was obtained near the same 
place but under somewhat different conditions. "I was looking 
for nests among the mesquites when the male of this pair came 
circling over me. Upon shooting him the female appeared, and I 
succeeded in getting her also. Feeling sure that they had a nest, 
I began to search the surrounding trees and soon discovered it,* 
well hidden by bunches of mistletoe.” 
Dr. Coues took a Zone-tailed Hawk on the Gila River, Sept. 
24, 1864, and this, so far as I know, is the only identified Arizona 
specimen which has been previously announced. I cannot help 
thinking, however, that the bird which Capt. Bendire found 
breeding in Arizona in 1872 really belonged to this species, as he 
at first supposed, and not to Urubitinga authi'acina , as afterwards 
surmised by Mr. Henshaw. Nor is it improbable that the black 
Hawks seen by the latter gentleman near Camp Bowie were also 
referable here. 
31 1, £ im., Tucson, April 30. Length, 18.70; extent, 49.50; wing, 15; 
tail, 8.75; culmen (chord from cere), .88. “Iris brown; hill black, green - 
* The notes do not state what this nest contained. 
