No. In most cases, female spiders are bigger than male spiders.
No, but they sing a more varied repertoire of notes than females.
That way the females would be attracted to males.
Not as far as I know.
It is very difficult to distinguish males from females. For a thorough summary, accompanied by photographs, visit < http://www.migrationresearch.org/mbo/id/blja.html >. For much of the year, it is all but impossible to distinguish males from females. But Blue Jays know!
Male cheetahs are generally larger than females.
Male dolphins are slightly bigger than females
Yes Female Godwits are bigger than male Godwits.
Normally, yes male koalas are larger than female koalas.
Male salmon typically have a more pronounced hooked jaw, known as a kype, during spawning season. They also develop brighter colors and may be slightly larger than females. Females have a more streamlined body shape and tend to carry a larger egg load during spawning.
Males always have bigger antlers than females.
It depends on the breed. Male horses are not always bigger than females.
Females, which are abnormally larger than the male.
Male gorillas are larger. They grow 350-600 pounds. Females weigh 220 to 260 pounds.
Males are physically bigger and stronger than females and as such all the organs and bones of males are always bigger in comparison to females
Male guppies are considerably smaller than females of the same species.
Females are usually larger than males.