Frogs inhabit almost every part of the world and breed in a wide variety of areas. Since eggs can only develop in moist conditions, many frogs flock to temporary pools during their brief breeding seasons, but others reproduce in streams and water bodies that they always inhabit. Male frogs use mating calls to attract females, which can differentiate between their species and others based on the sound and location of the call. When a female reaches a calling mate, the male clasps her in a tight embrace, known as amplexus, in order to fertilize the eggs. The female then selects the site for egg deposition.