Mar., 1914 
SOME DISCOVERIES IN THE FOREST AT FVFFE 
69 
transparent shells showed traces of incubation, slight in four and well-marked in 
two. No other new nests were found during the day except those of the ever 
abundant Western Robin, Black-headed Grosbeak and Western Chipping Spar- 
row. 
Photography took up most of the following day (May 20). While engaged 
in this work along the ditch, I located a nest of the Sierra Junco close to where 
a fallen log crosses the stream (see fig. 25). The nest held four well-incubated 
eggs; well hidden in mountain misery just above the flowing water, it was only 
found by watching the birds from the opposite bank. The nest is rather unusual, 
being made almost entirely of cedar bark, in addition to which are some few 
weed stems and a lining of fine grasses and animal hair. While using the cam- 
era later in Webber Canyon, I spied a Western Yellow Warbler {Dciidroica 
F'ig. 32. Nest of the Thick-billed F'ox Sparrow. It was located 
IN AN ALMOST IMPENETRABLE THICKET AND HELD FOUR EGGS. NESTS 
OF THIS BIRD HAVE PROVEN EXTREMELY DIFFICULT TO FIND AL- 
THOUGH THE BIRDS THEMSELVES ARE COMMON IN APPROPRIATE LO- 
CALITIES. 
aestiva brczvsteri) weaving its light-colored, hempen, cup-like nest in a small 
sapling. 
On May 21 I ran across a very puzzling set of eggs. The nest, three feet 
up in deer brush, was in every respect a typical one of the Western Chipping 
Sparrow, being composed of rootlets and grasses and lined with horsehair. The 
four eggs it held, however, were short ovate in shape and unspotted, pale bluish- 
green in color. I hastily concealed myself some distance off to watch, if need be. 
the whole afternoon for the owner of these most remarkable looking specimens. 
The parent was fashionably late in appearing, and when she did so I learned the 
eggs were simply a unique set of that ever-present species, the Western Chipping 
Sparrow. On close examination I could just discern on one of the eggs some dim 
