Cassell's book of birds; vol. 4Brehm, Alfred Edmund
Science
Cassell's book of birds; vol. 4
Brehm, Alfred Edmund
Birds
"When sitting, the Gannets allow a person to approach within three feet,
sometimes much nearer, so that one may even touch them. When approached,
they merely open their bill and utter their usual cry, or rise to their
feet and express some degree of resentment, but little apprehension of
danger. They take advantage of the absence of their neighbours to pilfer
the materials of their nests; frequently two join in the same act, and
occasionally two may be seen at the same bunch, endeavouring to wrest it
from each other. They are constantly repairing their nests, which, being
composed in a great measure of seaweeds, shrink up in dry weather and
decompose in wet; and when seated close together have frequent quarrels.
I saw one seize its neighbour by the back of the neck, and hold fast
until the assaulted bird, I may say, roared out; but in general they
are satisfied with menacing each other with their open bills and loud
clamour." Owing to their so often interfering with each other, a constant
noise is kept up amongst them. Their cry is hoarse and harsh, and may be
expressed by the syllables, "Carra, carra," or "Kirra, kirra;" sometimes
it is "Crac, crac," or "Cra, cra," or "Cree, cree." The cry varies
considerably in different individuals, some having a sharper voice than
others, and when unusually irritated they repeat it with great rapidity.
When first hatched they have a smooth, bare, black skin; this soon becomes
covered with white down, which thickens until the nestlings present the
appearance of a powder-puff; through this down the true feathers, which
are black, appear, and are followed by the adult white plumage.
"The old bird," says Macgillivray, "at first feeds its young with a
kind of fish-soup, prepared in its own gullet and stomach, and which
it introduces, drop by drop as it were, into its throat; but when its
nursling is pretty well grown, it places its bill within its mouth and
disgorges the fish, either whole or in fragments. It never carries fish to
the rock in its bill. Upon the Cornish coast these birds are most abundant
in autumn and winter."
"The fishermen," says Mr. Couch, "learn by their actions when shoals of
pilchards are present, and what course they are pursuing. The Gannet takes
its prey in a different manner from any other of our aquatic birds; for,
traversing the air in all directions, as soon as it discovers the fish, it
rises to such a height as experience shows best calculated to carry it by
a downward motion to the required depth, and then, partially closing its
wings, it falls perpendicularly on the prey, and rarely without success,
the time between the plunge and immersion being about fifteen seconds."
THE FRIGATE BIRD.
Public-domain text, read in full here on John Shaqi.
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