378 KANSAS UNIVERSITY SCIENCE BULLETIN. 



The weather, taken as a whole, was very good during my 

 stay. It snowed at least once every week and sometimes twice, 

 but six inches of snow lasted only a day or two and did not 

 seriously interrupt my field-work. The days were usually as 

 clear as possible, however, with scarcely a cloud in the sky. 

 There was great variation of temperature between night and 

 day, from -f-30 deg. Fahr. at four A. M. to +70 deg. at noon 

 being about an average. By the end of the first week in March 

 signs of migrational activity were noticed, and by April 1, 

 the time of my departure, nearly all of the earlier species of 

 birds had come. 



The following notes are based on a collection of 170 speci- 

 mens, representing 39 species. As there are so few of them I 

 have given in its proper place the date when each was taken. 



I wish to thank Mr. Oberholser for correcting my identifi- 

 cation of the horned lark taken. 



1. Buteo horealis calurus (Cass.) — Western Red-tailed 

 Hawk. A Buteo, presumably this species, was heard scream- 

 ing on the side of the mountain February 26. On March 11 

 I found a pair of these red-tails about three miles west of town, 

 near Supai. They were racher wild, but must have picked on 

 a location for a nest, as they always returned to one locality. 



2. Falco sparverius deserticola Mearns. — Desert Sparrow 

 Hawk. Five adult males, taken on the following dates: 

 March 13; March 21, two; March 29, two. First seen March 

 13, and became more and more common toward the end of my 

 stay. One bird had a mouse of the genus Microtus in its talons 

 when shot. These little hawks were very tame and heedless. 

 One that I saw flew into a pine tree and perched out of sight 

 on the opposite side of the bole, screaming shrilly. I circled 

 round looking for it, but it was several minutes before I dis- 

 covered the bird, as it sat crouched down on a big limb with 

 its head towards me, looking like a twisted branch and evi- 

 dently relying on its protective coloration to escape attention. 



3. Dryobates villosus hyloscopus (Cab.) — Cabanis Wood- 

 pecker. One male, taken March 19. Two females, taken 

 March 2 and 8. Not very common. Were so wild that it was 

 hard to get near them. They were found among the pines, 

 and sometimes I would follow one nearly a mile, only to have 

 it start out at last and fly until it was out of sight in the dis- 

 tance. 



