Concord, Mass.
1910.
June 19
[June 19, 1910]  Clear & warm with light westerly wind.

Red-eyed Vireo hatches 2 of her young besides a Cow-bird.

  A nest of the Red-eyed Vireo containing three
eggs of the rightful owner and one of the Cow-bird
was found (by Gilbert) in an apple tree in our orchard
on June 8. When I next looked into it on June 17th
it held a young Cow-bird, newly hatched, and the 
three Vireo eggs. Today (at 2 P.M.) there were two
young Vireos, an unhatched Vireo's eggs, and the young
Cow-bird. A few years ago a Red-eyed vireo not
only hatched but reared two or three of her own young
besides a young cow-bird, in a nest in this same
orchard. I wonder if this will be repeated. The
instance just referred to is the only one that has
ever come under my notice when any young of
the rightful parent were reared with a young Cow-bird.