22 FIELD KEY TO THE LAND BIRDS. 
rivers, and ponds. He leaves his perch to catch pass- 
ing insects, and returns to the same spot. He isa 
determined foe to crows and hawks, which, though 
double his size, he drives from his quarters. His nest 
is usually on some branch overhanging the water. A 
common summer bird. 
OLIVE-SIDED FLYCATCHER. Contopus bo- 
realis. — Length, T4inches. Resembles the Kingbird 
in shape, and is dark gray all over, except the throat. 
belly, and behind the wing, where he is white. Rare, 
41. CRESTED FLYCATCHER. Myiarchus 
crinitus.— Length, 9 inches. Gray-brown above ; tail 
red-brown ; throat and breast gray; belly yellow. His 
habits are similar to those of the Kingbird, except that 
he prefers the tops of trees. He has a peculiar fashion 
of lining his nest with cast-off snakeskins. 
42. PHOEBE, PEWEE. Saynornis phoebe. — 
Length, 7 inches. Blackish gray above; underparts 
soiled white, gray, and yellow; no wing bars. Always 
untidy looking. One of the earliest birds to arrive 
in the spring. He builds his nest in the barn or 
woodshed, raising two or three broods a year in the 
