Life histories of North American woodpeckersBent, Arthur Cleveland
Science
Life histories of North American woodpeckers
Bent, Arthur Cleveland
Birds -- North America; Woodpeckers -- North America
I have seen perhaps a thousand holes in which this
woodpecker had bred or was breeding, and _every one_ was
excavated in a _living_ pine tree, ranging from eighteen
to one hundred feet above the ground. This bird never lays
its eggs until the pine gum pours freely from beneath and
around the hole, and in order to accelerate the flow the
birds puncture the bark to the “skin” of the tree thereby
causing the gum to exude freely. This species, unlike the
Pileated Woodpecker, returns to the same hole year after
year until it can no longer make the gum exude. But like
the Pileated Woodpecker, it is much attached to the tree
in which it has first made its nest, and as long as it can
find a suitable spot it will continue to excavate new holes
until the tree is _killed_ by this process of boring. I
have frequently counted as many as four holes in one tree,
and in two instances I have seen as many as eight. These
birds seem to know by instinct that the center of the tree
is rotten, or what lumber men call “black-heart,” and they
never make a mistake when selecting a tree! The hole is
bored through the solid wood, generally a little upward,
and to the center of the tree (which is always rotten).
The overwhelming majority of observers who have studied the
red-cockaded woodpecker in its normal habitat concur in the opinion
that the site of selection for the nest hole is in a living pine that,
however, has begun to rot at the core, and this condition of the
heart of the tree the birds seem to be able to discern with unfailing
accuracy. All the nests I have seen and studied were in living pines,
and other ornithologists have made similar observations. T. Gilbert
Pearson (1909) says: “So far as I have observed, always excavated
in the trunk of a living pine tree. The site chosen varies from
twenty-five to fifty feet from the earth.” H. L. Harllee (MS.), of
Florence, S. C, writes: “It nests in the same hole each year in close
proximity to several pairs, usually from two to four.” The observations
of Gilbert R. Rossignol (MS.), writing from Savannah, Ga., agree with
the foregoing. He states: “Before the lumberman invaded our great pine
forests, the red-cockaded was fairly common, for I have found 10 or 12
pairs nesting in a 50-acre tract, provided, of course, that the pine
trees were not too close to one another. These little woodpeckers did
not like dark heavily timbered forests. The bird drills a hole in a
living pine ranging from 25 to 80 or more feet high, and it is almost
impossible to get the eggs without full equipment. It takes a brace
and bit to bore holes a little above where you think the bottom of the
nest is located, and then sometimes you strike below it, or again right
into it on an incomplete set or no eggs at all. The eggs I have found
were always more or less sticky with pine gum. This bird will nest in
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