The Descent of Man, and Selection in Relation to Sex

by Charles Darwin

Beaks, of birds, bright colours of.

Beard, development of, in man; analogy of the, in man and the quadrumana; variation of the development of the, in different races of men; estimation of, among bearded nations; probable origin of the.

Beard, in monkeys; of mammals.

Beautiful, taste for the, in birds; in the quadrumana.

Beauty, sense of, in animals; appreciation of, by birds; influence of; variability of the standard of.

Beauty, sense of, sufficiently permanent for action of sexual selection.

Beaven, Lieut., on the development of the horns in Cervus Eldi.

Beaver, instinct and intelligence of the; voice of the; castoreum of the.

Beavers, battles of male.

Bechstein, on female birds choosing the best singers among the males; on rivalry in song-birds; on the singing of female birds; on birds acquiring the songs of other birds; on pairing the canary and siskin; on a sub-variety of the monk pigeon; on spurred hens.