THE BIRD BOOK 
713a. Bryant’s Cactus When. Heleodytes 
brunneicapillus bryanti. 
Range. — Northern Lower California and 
coast of southern California. 
The nesting habits of this variety differ in 
no respect from those of the last. 
713b. San Lucas Cactus Wren. Ueleo- 
dytes brunneicapillus affinis. 
Range. — Southern Lower California. 
Eggs indistinguishable from those of the last. 
Salpinctes obsoletus 
715. Rock Wren. 
obsoletus. 
A ) Range. — United States, west of the plains, 
/ breeding north to British Columbia, and south. 
to Mexico; winters in south- 
western United States and south- 
ward. 
This species appears to be 
quite abundant on rocky hill- 
sides throughout its range; like 
most of the Wrens they draw 
attention to themselves by their loud and va- 
ried song. They nest in crevices or beneath overhanging rocks, making the 
nest out of any trash that may be handy, such as weeds, grass, wool, bark, root- 
lets, etc.; their eggs range from four to eight in number and are pure white, 
hnely specked with reddish brown. Size .72 x .50. 
Rock Wren 
White 
7l6. Guadalupe Rock Wren. Salpinctes guadeloupensis. 
Range. — Guadalupe Island, Lower California. 
A similar but darker and browner species than the Rock Wren. It breeds in 
abundance throughout the island from which it takes its name, placing its 
nests in crevices among the boulders or cavities of fallen tree trunks and, as is 
often done by the last species, lining the pathway to the nest with small 
pebbles. The eggs, which are laid from January to April, resemble, in all 
respects, those of the common Rock Wren. 
717. White-throated Wren. Catherpes mexicanus albifrons. 
Range. — Northeastern Mexico and the Lower Rio Grande Valley in Texas. 
The habits of the White-throated Wren are the same as those of the Canon 
Wren, which variety is more common and better known; the eggs of this 
species are not distinguishable from those of the next. 
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