In insects in particular, females are often larger than the males. It is thought that the reason lies in the huge number of eggs that insects lay; a larger body size enables a female insect to lay more eggs.
Why are male insects smaller than females?
He proposes a theory to explain the advantages of small size: While females are bulking up, males are devoting their energy and resources to growing mature reproductive organs, which are much larger and more elaborate than in females—and relative to overall body size, are also significantly bigger than those of mammals …
Why are female stick bugs bigger than males?
Walking stick bugs reach maturity after 3 months to a year. Female stick bugs are generally larger than males. This is due to their large abdomens for production of eggs and larger mouths to consume more food. Most male stick species have wings that enable them to fly in search of mates.
Are males always smaller than females?
There are large variations of size among humans but in all populations, men are larger on average than women. For most biologists this fact can be easily explained by the same processes that explain the size dimorphism in large mammals in general and in apes in particular.