Explore "The Descent of Man and Selection in Relation to Sex" by Charles Darwin on Textopian. Read with annotations and highlights.
FISHES: Courtship and battles of the males-Larger size of the females-Males, bright colours and ornamental appendages; other strange characters-Colours and appendages acquired by the males during the breeding-season alone-Fishes with both sexes brilliantly coloured-Protective colours-The less conspicuous colours of the female cannot be accounted for on the principle of protection-Male fishes building nests, and taking charge of the ova and young.
AMPHIBIANS: Differences in structure and colour between the sexes-Vocal organs.