dults and later
the young suffered infestation of the northern fowl mite,
_Ornithonyseus sylviarum_. Nolan (1960:241) reports a heavy
infestation of this mite at four nests. Unidentified mites were noted
at four nests in my study area in 1959. Incubating adults were
observed to peck at their breasts and scapulars from the eleventh
through the fourteenth day of incubation. Serious infestations were
not noted at the nests until the ninth day of nestling life. At this
time the young were observed to scratch their heads and peck at their
breasts, scapulars, and the base of their tails. On the day of
fledging the nests were a seething mass of crawling mites; the mites
also extended well up the branches to which the nests were attached.
Nest 1-a (1959), which was discovered on June 18, 1959, presumably on
the day after fledging, was densely covered with mites. Some mites
were still crawling on this nest on June 20, 1959.

FLEDGLING LIFE

On June 20, 1959 I located one young 80 feet northeast of nest 2-a
(1959), about five hours after it had left the nest. One parent was
observed to feed it once. No young were seen thereafter from this or
any other nest. Extreme agitation on the part of one or both parents
on several occasions shortly thereafter, however, suggested the
proximity of the young. Search in the immediate vicinity on each of
these occasions proved fruitless. Three days after fledging their
young, pair 2 (1959) was primarily occupied with courtship activities.
Pair 1 (1959) was involved in courtship and nestbuilding one and
one-half days after the apparent fledging of their young. Nolan
(1960:238) indicates that the young remain within the territory and
perhaps are fed by the parents up until an age of about 40 days.
Sutton (1949:25) and Lawrence (1953:68) present contradictory reports
on fledgling-parent relationships in the Red-eyed Vireo. Sutton
concluded that the young quickly took leave of their parents whereas
Lawrence reported a young bird being fed 35 days after fledging.

_Second Broods_

The curve based on 66 nesting records of the Bell Vireo representing
the breeding activity in northeastern Kansas demonstrates a tendency
toward double-broodedness (fig. 6). The peak of the breeding season is
from May 20 to June 20. The large number (20) of replacement nests
built in late May of 1960 tends to distort the curve of the breeding
data; a second peak about 35 days after the first is evident.

I