Life histories of North American woodpeckersBent, Arthur Cleveland
Science
Life histories of North American woodpeckers
Bent, Arthur Cleveland
Birds -- North America; Woodpeckers -- North America
The feeding of the young is by regurgitation; and, while the young are
still small and remain at the bottom of the nesting cavity, the parents
may be seen to follow an interesting routine. The incoming bird hops
to the hole, perches on the ridge of the entrance passageway, and then
swings inward and downward, at the same time elevating the posterior
part of its body until the tail presses upon the outer upper rim of the
hole. In this position, evidently, the parent’s bill meets those of the
nestlings. This attitude is maintained often for as much as a minute,
and while it is maintained the body of the bird may be seen to shake
convulsively--plainly indicating that regurgitation is in progress.
When the young are small, the parent, after feeding, does not
immediately leave the nest but awaits the incoming of its mate. It
then glides away on wide-spread wings; and, while I suspected that the
excrement of the young is carried in the bill and dropped, I was unable
to detect this. Quite possibly, in this early stage at least, the
excrement is swallowed by the parent.
Charles W. Townsend (1925) gave account of a family observed in
Worcester County, Mass., when the young were well developed and nearly
ready to leave the nest:
On June 11, 1924, I spent five hours within twenty-five
feet of the base of the stub, unconcealed, and on June 14,
six hours, but after the first hour I took up a position
about fifty yards away, partially concealed by bushes.
My observations may be summarized as follows: the young
were fed eleven times at the first visit, four times at the
second when the adults acted in a very shy manner. As a
rule the female fed the young, but on three occasions the
male was identified at the hole. * * *
As a rule the adult appeared suddenly at the hole, flying
noiselessly through the forest. Occasionally it alighted
below the hole and rapidly ascended by hops, or it alighted
on some neighboring tree, and often calling like a Flicker,
glided on motionless outstretched wings in a graceful curve
to its young. The flight away from the hole was always
direct after a preliminary downward glide and lacked the
usual woodpecker undulations. * * *
The three young crowded to the hole as soon as a parent
appeared anywhere in the neighborhood and eagerly stretched
forth their heads and necks. * * * They were always hungry
and screamed with rasping voices for food, once or twice
they uttered low whinnies. The adult inserted its bill
to its full length into the throats of the young and
vigorously regurgitated and pumped in the nourishment. * * *
After feeding the young, the female on several occasions,
the male on one, entered the nest, to emerge after a minute
or two and glide away. Once I detected a white piece in the
bill, once, something dark, but the other times nothing at
all.
Public-domain text, read in full here on John Shaqi.
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