BIRDS OF THE PAPAGO SAGUARO NATIONAL MONUMENT. 39 



has a comparable, though lesser performance, usually given when 

 in pursuit of the female. Both birds flying low over the bushes, 

 the male repeatedly utters a low, chuckling sound, " tuc-tuc-tuc-a- 

 tuc-tuc c-r-rooo," a rolling note, the finale very dove-like in effect. 

 While uttering this call the wings are held stiffly extended downward. 

 Then, in ordinary flight, there is repeatedly given a long drawn, 

 nasal " w-a-ng." 



The Texas nighthawk is a summer visitant in Arizona, retiring to 

 more southern latitudes during the winter months. It has been 

 observed along the Colorado River from April 9 to October 5; in 

 the central part of the State it is probably some weeks later in arriv- 

 ing, and possibly earlier in departure. 



The eggs are two in number, grayish or cream colored, and finely 

 speckled or marbled with darker markings. This coloration is in 

 excellent imitation of the sandy or gravelly ground upon which they 

 rest, for no nest building is attempted. The resemblance of eggs to 

 background is so perfect that the closest scrutiny is required to reveal 

 their presence, even though departure of the brooding female indi- 

 cates their proximity. 



Texas nighthawks are abundant in the Salt River Valley. On the 

 Papago Saguaro Monument they were flushed during the daytime 

 from beneath bushes; in Tempe they were seen of evenings soaring 

 over the town. About Roosevelt Lake several were startled from 

 their resting places beneath the bushes, but the species was not 

 abundant at this point. 



ARIZONA CRESTED FLYCATCHER. 



Myiarchus magister magister Ridgway. 



Recognition marks. About 10 inches in length, of which the tail 

 is nearly half. In color, above dark brownish, below with gray 

 throat and yellowish belly. Wings and tail appear decidedly red- 

 dish when outspread in flight. 



Occurrence. Visitors from the eastern United States comparing 

 the Arizona bird with the eastern crested flycatcher (Myiarchus 

 crinitus) will find the two of about the same size, but the Arizona 

 bird with longer tail and of appreciably paler coloration. California 

 bird students, making comparison with the ash-throated flycatcher 

 (J/. cinerascens), will find the Arizona crested flycatcher very simi- 

 lar in color and proportions, but of greater size. To distinguish be- 

 tween these two latter species is not always an easy matter. The 

 ash-throat inhabits large portions of Arizona where the Arizona 

 crested flycatcher does not occur, but it is also found, apparently, 

 throughout the range of the latter species. The difference in size 

 between the two is readily appreciable when it is possible to make 



