Mar., 1921 NOTES ON BIRDS OBSERVED NEAR WILLIAMS, ARIZONA 63 
usually slipped away when I tried to get directly under them. An immature bird in 
juvenal plumage recently from the nest was taken on July 14. 
25. Piranga hepatica oreophasma Oberholser. Hepatic Tanager. This fine tan- 
ager was fairly common among the low yellow pines remaining among the broken hills 
south of Williams around the eastern base of Bill Williams Mountain. The birds were 
breeding here, aS was shown by the condition of females taken, and were found usually 
in pairs. In feeding they worked methodically, flying from tree to tree, the male show- 
ing a flash of red in passing. Usually they alighted among the lower limbs and then 
worked out on the tips of the branches, fluttering up from limb to limb toward the top. 
Once a male dropped to the ground after an escaping insect. On one occasion I saw a 
male feeding a female and shot her under the impression that she was a young bird. 
The male of this pair was still in immature plumage but was molting and had developed 
a few red feathers. The call note of this species was a soft chewp chewp that curiously 
enough was very similar to the call of the Porto Rican Tanager (Nesospingus speculi- 
HORUS) 
26. Progne subis subis (Linnaeus). Purple Martin. A pair of these martins was 
observed about Williams on July 6 and 7, and on July 9 two pairs were circling over the 
canyon south of town. 
27. Tachycineta thalassina lepida (Mearns). Northern Violet-green Swallow. 
This species was fairly common and several pairs nested in the canyon south of town. 
They were seen in the evening hawking for insects or resting on telephone wires. 
28. Vireosylva gilva swainsoni (Baird). Western Warbling Vireo. These birds 
were seen among quaking aspens on July 8 and 14. 
29. Lanivireo solitarius plumbeus (Coues). Plumbeous Vireo. Plumbeous Vireos 
were fairly common among oaks and aspens near Williams. 
30. Vermivora virginiae (Baird). Virginia Warbler. This species was fairly 
common in occurrence. On July 7 a female was flushed from a nest among scrub oaks 
on the lower slopes of Bill Williams, but the nest could not be found. A male was heard 
singing on July 9. On July 14 I found a brood of fully grown young still in company 
with their parents. They were very active in working through the limbs of oaks and 
pines, and constantly twitched the tail up and down, a very characteristic motion. All 
were silent. 
31. Dendroica aestiva (Gmelin). Yellow Warbler. A male was seen in the can- 
yon south of Williams on July 8 and another on July 14. Neither of these birds was 
secured. It was believed that they were migrants. 
32. Dendroica auduboni auduboni (J. K. Townsend). Audubon Warbler. Com- 
mon. Males were in song as late ag July 14. 
33. Dendroica graciae Baird. Grace Warbler. These birds were found in small 
numbers among the yellow pines and oaks in the canyon south of Williams. At this 
season males were not singing, so that it was difficult to locate them, as the birds, 
though quick and active, are very small. On July 8 several were seen and breeding 
males were collected in an area of yellow pine forest with an undergrowth of scrub oak. 
Several came down and scolded at me sharply. 
34. Dendroica nigrescens (J. K. Townsend). Black-throated Gray Warbler. A 
male was singing among oaks on the slopes of Bill Williams Mountain at an aititude of 
7300 feet on July 7. 
35. Salpinctes obsoletus obsoletus Say. Rock Wren. Common. Broods of grown 
young were seen on July 6 and July 11. These immature birds had a number of odd, 
bizarre call notes that several times deceived me into following them in hope of discov- 
ering some other species. They were tame and came fearlessly within a few feet of 
me, peering about under the rocks, examining the smallest cracks and squeezing in and 
around small crevices. 
36. Catherpes mexicanus conspersus Ridgway. Canyon Wren. Fairly common 
around Bill Williams Mountain. On July 8 a female was found feeding young in the 
canyon south of town. The young, three in number, though not fully fledged, had left 
the nest and reposed at the bottom of a cleft in the rock in a space two inches wide. Here 
they dozed in semi-darkness while awaiting the coming of food. The labor of caring 
for them seemed to be left entirely to the female, though the male was in the vicinity. 
The female came and went fearlessly carrying food, in the form of brown crickets witli 
elongated antennae, paying little attention to me as I peered in the crevice with my face 
