134 USEFUL BIRDS. 
May 17.— A male Yellow Warbler came to the brown-tail moth tree 
and began eating the larvee. He had eaten four when a flock of English 
Sparrows fiew into the tree and drove him out, one of them chasing him 
across the boulevard. The remaining five Sparrows pecked a few times 
at the larvee, then they flew to the street below. A Song Sparrow came 
to the tree in the early morning.and perched a while and sang, then he 
went to the ground and foraged for about twenty minutes, searching in 
the grass, then among the leaves. I saw him take two small green 
grasshoppers. He then went to the tree and picked five brown-tail 
larve from the branch, then flew away. A pair of Wood Thrushes 
came to the orchard and stayed thirteen minutes. They were chasing 
each other through the trees most of the time, but I saw one of them 
take several cankerworms from the leaves. Finally they were chased 
out by a Kingbird that is nesting near by. A Yellow-throated Vireo 
came to one of the apple trees that has a tent caterpillars’ web on it, 
took two of the caterpillars, and, after hammering them well on the 
branch, swallowed them whole. He then went to another tree and 
began eating cankerworms. 
The number of gipsy moth caterpillars increased from this 
time on, as the eggs hidden away in cool and shady places 
hatched out; the number of birds seen feeding on them also 
increased. 
May 18.— Malden. In the deer park, just back of Mr. Dutton’s, I 
found the gipsy moth larvee quite plentiful. A Black and White Warbler 
came to the infested trees and hopped along on the trunk of a tree near 
me, picking at the bark, and finally hopped to one of the branches with 
larvee on the leaves, took eight gipsy larvee in a very short time, then 
flew over the ledge out of sight. A pair of Golden-winged Warblers 
were busy for a long time in the thick bushes. They came to the small 
infested trees and picked the larve from the leaves. Saw them take 
twelve gipsy larvee, and they must have taken more. Yellow Warblers 
were constantly passing through the trees. They would alight for a 
moment and pick three or four gipsy larvee, then fly on. Ishould think 
there were as many as twenty-five that passed through. A single Chest- 
nut-sided Warbler came to the trees and stayed fourteen minutes, and 
took twenty-two of the gipsy larve that I saw, and many besides, I 
presume. He also took some kind of green larvee from the leaves. He 
would pick a few, and thensing. A pair of Oven-birds were apparently 
building near. They were chasing each other through the trees every 
few minutes, and would alight on the low bushes and pick the larvee 
from the leaves. They would stay but a moment at atime. A Brown 
Thrasher, after scratching in the leaves in the bushes out of sight for a 
while, came out into the opening, hopped along under the small cherry 
