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hen. 1859 1860 1861
hen, are at first excessively wild. 1866 1869 1872

1 blocks not present in 1859 1860 1861; present in 1866 1869 1872
So it is with young pheasants reared in England under a hen.

probably, habit and selection have 1859 1860 1861 1866
habit and selection have probably 1869
habit and selection have 1872

←Subtitle not present 1859 1860 1861 Special Instincts. 1866 1869 1872
three, out of the several which I shall have to discuss in my future work,— 1859 1860 1861 1866
three, out of those which I shall have to discuss in my future work,— 1869
three,— 1872

←Subtitle not present 1859 1860 1861 Instincts of the Cuckoo .— 1866 1869 1872
now commonly admitted 1859 1860 1861 1866
supposed by some naturalists 1869 1872

cuckoos instinct 1860
cuckoo's instinct 1859 1861
most remarkable of the instincts of the cuckoo 1866
instinct of the cuckoo 1869 1872

under a hen. It is not that chickens have lost all fear, but fear only of dogs and cats,
for,
for
if the hen gives the danger-chuckle, they will run (more especially young turkeys) from under her, and conceal themselves in the surrounding grass or thickets; and this is evidently done for the instinctive purpose of allowing, as we see in wild ground-birds, their mother to fly away. But this instinct retained by our chickens has become useless under
do- mestication,
domestication,
for the mother-hen has almost lost by disuse the power of flight.
Hence, we may conclude, that
under domestication
domestic
instincts have been
acquired,
acquired
and natural instincts have been
lost,
lost
partly by habit, and partly by man selecting and
accumulating,
accumulating
during successive generations, peculiar mental habits and actions, which at first appeared from what we must in our ignorance call an accident. In some cases compulsory habit alone has sufficed to produce
such
such
inhe- rited
inherited
mental changes; in other cases compulsory habit has done nothing, and all has been the result of selection, pursued both methodically and
unconsciously:
unconsciously;
but in most
cases
cases,
probably, habit and selection have
probably concurred.
acted together.
We shall, perhaps, best understand how instincts in a state of nature have become modified by selection, by considering a few cases. I will select only three, out of the several which I shall have to discuss in my future work,— namely, the instinct which leads the cuckoo to lay her eggs in other
birds'
birds
nests; the slave-making instinct of certain ants; and the
cell-making
comb-making
power of the
hive-bee:
hive-bee.
hive-bee;
These
these
two latter instincts have
generally
generally,
and
most
most
justly
justly,
been ranked by naturalists as the most wonderful of all known instincts.
It is now commonly admitted that the more immediate
and final
and final
cause of the cuckoos instinct is, that