Sept. , 1912 
NOTES FROM TODOS SANTOS ISLANDS 
191 
Hirundo erythrogastra. Barn Swallow. Quite a colony seemed to be 
contemplating settling down for the season in one of the caves along the 
shore. 
Vermivora celata sordida. Dusky Warbler. This was the commonest 
bird on the island but was remarkably wild ; so much so that the only way I 
could get one was on the wing. Owing to the lack of suitable bushes and small 
trees, they seemed to confine their nesting operations to a vine resembling a 
clematis, that grows over vegetation a couple of feet high. From a nest in this 
growth I flushed a bird by almost stepping on it. The four fresh eggs were in 
a dainty cup built of a silvery lichen that grows on almost everything in sight. 
The structure was lined with finer pieces of the same sort of lichens, making one 
of the most beautiful nests I have ever seen. Although T spent many hours 
tramping all over the island, the birds failed to reveal even the approximate 
location of another nest. 
Salpinctes obsoletus. Rock Wren. Two pairs of these birds had selected 
nesting sites, and were not only anxious to let the whole world know it, but 
were willing to show the exact spot to anyone interested. 
Sialia mexicana occidentalis. Western Bluebird. A pair appeared near 
camp on the nineteenth but were not present afterwards. 
SOME BIRDS OF THE SAW-TOOTH MOUNTAINS, IDAHO 
By STANLEY G. JEWETT 
D F’RING the fall of 1910 I was sent into the Saw-tooth Mountains of Idaho 
to do some zoological collecting. I arrived at Ketchum on October 24 and 
left the mountains on December 20, after working at Ketchum in the 
Wood River Valley, and at the Boston Mine near the source of Rook’s Creek. 
Side trips were made to the sources of Warm Spring and Baker Creeks, up to 
9000 feet elevation. Wood River Valley at Ketchum is bordered with groves of 
aspens and cottonwoods alternating with extended thickets of williow. A few miles 
above the town the valley closes up to a narrow canyon with steep slopes on either 
side clothed with a heavy forest of Douglas spruce and Murray pine. In the vicin- 
ity of the Boston Mine on Rook’s Creek most of the southern slopes are bare of 
forest trees, but clothed with a thick carpet of grass and sage-brush {Art emisia 
tridentata) , while the northern slopes and canyons are well covered by such forest 
trees as Douglas spruce, Murray pine and lodge pole pine. This entire region is 
in the Saw-tooth National Forest Reserve, and is used for sheep grazing from 
July until September. The summer climate is delightful but frosts occur irregu- 
larly throughout the year, so no attempt at farming is made. Wood River and 
all its tributaries are well stocked with trout, and deer, bear and goat are fairly 
plentiful a few miles back from Ketchum. At the time of my arrival, October 24, 
most of the summer migrants, both birds and sportsmen, had left for warmer 
climates so the following list includes only what I believe to be winter residents, 
with the exception of one We.stern Robin (P. iit. propinquus) seen October 27 
at Ketchum. 
Anas platyrhynchos. First seen on November 30; then common during De- 
cember. Along Wood River several warm springs keep the ice thawed out in small 
