Fig wasps lay fertilized eggs within figs, and no females disperse. In some species, males are wingless upon hatching and cannot leave the fig to seek mates elsewhere. Instead, males compete with their brothers in order to fertilize their sisters in the figs; after fertilization, the males die.
Female fig wasps give rise to offspring within figs, and no females roam. In certain species, newborn males are wingless and cannot depart from the fig to seek mates elsewhere. Instead, males engage in a struggle with their brothers to fertilize their sisters within the figs; after fertilization, the males meet an untimely demise.