68 
THE CONDOR 
VOL. VI 
TABI.K OF MEASl'RHMRNTS IN MII.I.IMETERS OF NORMAL AND SMAEE.SIZED EGGS OF THE 
CAI.IFORNIA MURRE. 
TYPICAL EGGS 
SMALL 
EGGS 
TYPICAL EGGS 
SMALL EGGS 
T 
50 X 81 
43 X 
69 
6 
32 
X 86 
42 X 
79 
2 
51 
‘ 84 
43 “ 
69 
7 
32 
“ 86 
41 “ 
71 
3 
51 
‘ 82 
43 “ 
67 
8 
33 
“ 83 
43 “ 
69 
4 
3-2 ‘ 
‘ 81 
43 “ 
70 
9 
32 
“ 86 
39 “ 
60 
3 
32 ‘ 
‘ 90 
43 “ 
63 
10 
32 
“ 86 
37 “ 
63 
EGGS OF CALIFORNIA MURRE 
Twelve Rock Wren Nests in New Mexico 
HV FLORENCE MFIRRIAM liAILFIV 
ILH’S TKA TED WITH I'HOTCO UA PHS FROM THE BIOLOGICAL St'RN EV COLLECTION 
R ock wrens abound among the eroded sandstone cliffs and gulches of the 
plains region of New Mexico, and while we were working in the country last 
summer we found twelve of their nests and innumerable families of young 
birds. 
Our twelve nests were distributed over a period of three months with margins 
On either side, the first of those containing young being found on May 23, and the 
last on August 25. Of the four nests of young that we discovered, three were 
found between May 23 and June i. A nest containing six eggs on June 27 was 
our only record of eggs. 
As the wrens themselves identified eight of our twelve nests — the one con- 
taining eggs, the four with nestlings, and also three of the unoccupied nests, the 
old birds being in evidence about them — we became sufficiently familiar with the 
Salpinctian style of architecture to leave no doubt as to the identity of the remain- 
ing four. 
While the nests varied in bulk and the relative proportion of sticks, weeds, 
and grass stems used, and one builder so far departed from the general custom as 
to line with hair and feathers, one peculiarity characterized all twelve of the 
