The Courtship of AnimalsPycraft, W. P. (William Plane)
Science
The Courtship of Animals
Pycraft, W. P. (William Plane)
Animal behavior; Natural selection
The display of the beautiful Peacock Pheasant differs conspicuously
from that of the Peacock, and recalls that of the Argus Pheasant. In
the Peacock Pheasant, as will be seen from the adjoining photograph,
the wings, and tail, are alike bedecked with ocelli. The display is
made by the bird as it crouches close to the ground, with the wings and
tail raised to form a continuous, patterned surface, the head being
swiftly moved during the performance; hence its blurred outline in the
photograph.
[Illustration: Plate 15.
_Photo by D. Seth-Smith._
PEACOCK PHEASANT.
The display of this bird differs conspicuously from that of the Peacock
and recalls that of the Pigeon in some respects. The “ocelli” on the
wings afforded Darwin the interpretation he sought for as to the
meaning of the notch in the “eye” of the Peacock’s tail-feather.]
[Illustration: Plate 16.
_Photos by the Author._
“THE PEACOCK IN HIS PRIDE.”
In the upper figure it will be noticed the “train,” when erected,
encircles the base of the neck; the lower figure shows the train
supported by the tail and dropping on each side in front of the wings.
[Face page 96.]
The Argus Pheasant is an even more wonderful performer than the two
preceding species. In this bird, it should be remarked, the tail and
the secondary wing-feathers are enormously lengthened, the latter to
an extent met with in no other bird, showing that the struggle for
existence cannot be very severe with this species. For if long
journeys had to be undertaken in search of food, or to avoid extremes
of climate, or enemies had to be swiftly escaped, such cumbersome
wings would lead to speedy extermination. But an even more remarkable
feature of these wings is their wonderful coloration. The primaries
have blue shafts, and a most delicately mottled pattern formed by spots
of reddish chocolate on cream-coloured ground, while the secondaries
have their broad webs ornamented with large ocelli, to be described in
greater detail presently. When under the influence of sexual excitement
Darwin tells us, the wings are so spread as to form a deep concavity,
an effect which is gained by pressing the primaries close to the
ground, and turning the elbows upwards. Within this concavity lie the
ocelli, in radiating vertical rows. But to produce this effect the bird
has to turn its head under its wing, so that it lies behind the screen.
Hence it cannot see the female which is the object of these captivating
antics. As a consequence, to discover whether he has an audience for
she will often walk disdainfully away—he has constantly to thrust his
head through the curtain, and hence many of the feathers in this region
get much worn.
Public-domain text, read in full here on John Shaqi.
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