62 
THE CONDOR 
Vol. XIV 
Crossing' the river we spent some time trying to locate the nest of a Yellow- 
throat (Gcothlypis trichas occidciitalis) but without success. This bird was 
present all along the irrigating ditches, but the nests were so well hidden I could 
not locate a single one. WYstern Tine Grosbeaks ( Guiraca cacnilca la::ula) were 
seen in several places among the willows which lined the irrigating ditches, but 
it was too early for their nests. Sets of Desert Song Sparrow {Melos pisa 
uiclodia f alias ) with four fresh egg's, in a low bush, and Bullock Oriole, five eggs, 
incubation begun, from a nest hung at the tip of a drooping willow branch, were 
our next finds. 
As I crowded my way through a dense thicket of small willows there was a 
flutter of wings, and right under my hand was a nest of ]\Iexican Ground Dove 
with its two pretty eggs, nearly fresh. 1 had just finished packing them and 
Fig. 16. nests of SWAINSON hawk in MESQUITE. THE UPPERMO.ST 
IS THE OCCUPIED NEST 
Started on, when a single "quak” overhead made me look up just in time to sec 
an Anthony Green Heron (Bitforides viresceiis aiithoiiyi) leave its nest twenty 
feet up. in a willow .so slender it would scarcely hold my weight as I climbed and 
collected the set of five fresh eggs. While packing the eggs, I heard a hummer, 
and there, close by, was a female Costa feeding two young nearly grown. 
It was getting late, .so we started back toward our machine. On the way, 
George was delighted to find a nest of Costa Hummer with two fresh eggs in it. 
The nest was placed five feet up on a drooping branch of a willow. I located a 
nest of Western Blue Grosbeak almost completed. \Yrmilion Flycatchers were 
numerous liut nearly all of them had young. Long-tailed Chats and Sonora Red- 
wings (Agclaiiis plwcniccus sonoricusis) were common, but only partial sets of 
either were found. Abert Towhee was just beginning to ne.st also. As we 
