polygamy in the guinea-fowl and canary-bird; on the proportion of the
sexes in cattle; on the pugnacity of the peacock; on a nuptial assembly
of magpies; on the finding of new mates by crows; on partridges living
in triplets; on the pairing of a goose with a Chinese gander.
Foxes, wariness of young, in hunting districts; black.
Fraser, C., on the different colours of the sexes in a species of
Squilla.
Fraser, G., colours of Thecla.
Frere, Hookham, quoting Theognis on selection in mankind.
Fringilla cannabina.
Fringilla ciris, age of mature plumage in.
Fringilla cyanea, age of mature plumage in.
Fringilla leucophrys, young of.
Fringilla spinus.
Fringilla tristis, change of colour in, in spring; young of.
Fringillidae, resemblance of the females of distinct species of.
Frog, bright coloured and distasteful to birds.
Frogs, male; temporary receptacles for ova possessed by; ready to breed
before the females; fighting of; vocal organs of.
Frontal bone, persistence of the suture in.
Fruits, poisonous, avoided by animals.
Fuegians, difference of stature among the; power of sight in the; skill
of, in stone-throwing; resistance of the, to their severe climate;
mental capacity of the; quasi-religious sentiments of the; resemblance
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