The Bird Study BookPearson, T. Gilbert (Thomas Gilbert)
Science
The Bird Study Book
Pearson, T. Gilbert (Thomas Gilbert)
Birds; Birds -- Conservation
With the altricial birds the young are hatched in an absolutely
helpless condition, being both blind and naked, and it is necessary
that they be fed by the parents, not only while occupying the nest, but
also for several weeks afterward. To this group belong most of the
small birds we are accustomed to see about the house. When newly born
the food they receive is first digested in the crop or the stomach of
the parent from which it is regurgitated into the mouth of the young.
Flickers, Hummingbirds, Doves, and some others continue to feed their
young in this manner, but usually the method soon gives way to that,
more commonly observed, of simply supplying soft-bodied insects which
have been captured and killed but not eaten.
In the case of Pelicans, Cormorants, and Ibises, {45} the young thrust
their bills far down the throats of the parents to procure the
regurgitated food. From this custom the ancients may have got the idea
that Pelicans feed their young with their own life blood. The
suggestion still persists, and on the seal of one of our large life
insurance companies of America a Pelican and her young are represented
accompanied with the motto: "I live and die for those I love." The
great seal of the State of Louisiana uses a similar picture without the
motto.
Hawks and Owls tear their prey to pieces and on this the young feed at
infrequent intervals. Sometimes several hours pass between the visits
of the food-laden parents, but the supply is usually adequate when at
length it arrives.
_Sharing the Labours._--Most young birds, however, are fed with great
frequency. For more than an hour one day the writer watched a pair of
Georgia Mockingbirds feeding their young. The one that appeared to be
the female visited the nest with food on an average once every two
minutes, and the male {46} made a similar trip about once in twelve
minutes. He could have done better had he not spent so much time
flying aimlessly about and scolding imaginary enemies.
Some birds have what seem to be very curious habits at the nesting
time. The jealous-hearted Hornbill of the Old World never trusts his
spouse to wander away from the nest after her duties there once begin.
In order that he may always know just where she is he quite willingly
undertakes to supply her with all her food during the days while the
incubation of the eggs is going forward. With mud he daubs up the
entrance to the hollow in the tree where she is sitting, leaving only a
small opening through which food may be passed. When the mud has dried
it becomes very hard and the patient mate is an absolute prisoner until
the day comes when she passes the word to her lord that the eggs have
hatched, and he sets her free.
In our own western country there dwells a bird known as the Phalarope,
the females of which enjoy {47} an immunity from domestic duties that
might cause the lady Hornbill many an envious sigh did she know of the
freedom of her American sister.
Public-domain text, read in full here on John Shaqi.
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