Secondary sex characteristic facts for kids
A pair of ducks. The left one (with the brown head) is the female. It is slightly smaller, and camouflaged. The male on the right is easily noticed; his colouring and size are secondary sexual characteristics.
Secondary sex characteristics are features which make it possible to tell the sexes of a species apart. They are not directly linked to reproduction.
Male birds usually have much more colourful feathers (plumage), the females are usually better able to hide, because their plumage is camouflaged.
Well-known secondary sex characteristics in humans are the deeper voice, facial hair (mustache and beard) and more muscular build in men. In women, those characteristics usually cited are more prominent breasts, lips, eyes, long/fast growing hair, no facial hair, wider hips, more fat, and generally a higher voice. Faces, generally, make a big impact. It is the part other people interact with.
Related pages
See also
In Spanish: Caracteres sexuales secundarios para niños
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Secondary sex characteristic Facts for Kids. Kiddle Encyclopedia.