BIRD LIFE IN WASHINGTON 
33 
CASSIN VIREO 
Cassin Vireo loves to suspend his nest 
from a fir limb, but lie is sometimes satis¬ 
fied with an alder. 
By the last of April his sharp and 
clear whistle rings over the open fir bor¬ 
dered lowlands. “Spirit, come 1101116 ," he 
says in almost thrusli-like tones. 
His white wing bars, the broken circle 
of white which nearly surrounds his eye, 
and a white stripe from his bill to his eye, 
help to distinguish Cassin Vireo from his 
cousins. 
Photo by the Author 
NEST OF CASSIN VIREO 
WESTERN WARBLING VIREO 
This bird is generally a little more 
common than Cassin Vireo. Its song is 
also more monotonous: “Ptwether, pwetli- 
