“Females in many groups seem to prefer higher-energy courtship signals,” says Lewis. In fireflies, females are wowed by faster or longer flashes; in some frogs, crickets and katydids, females like longer, louder or faster calls. In other words, a female wants a mate who works hard to get her attention.
Your branch or mine? By Jessica Gorman, Smithsonian Magazine, June 2005Amazing how those traits transend the various species. And apply to humans too.