Some are filter feeders that eat algae, and others have teeth and can eat anything from rotting vegetation to other tadpoles. While adult frogs are carnivores, tadpoles can be vegetarians or omnivores. In a few species, fully formed froglets hatch from the eggs, but most of the time the frog starts its life as a tadpole. Depending on the frog's species and the climate in which it typically lives, the eggs can hatch in a few days to a few weeks. Others lay eggs in dry areas and keep the eggs moist with water or urine. A few species carry their eggs in their vocal sacs or their abdomens. But not all eggs incubate underwater or without parental care. During mating season, researchers can use release calls to tell which frogs are male and which are female.Īll frogs' eggs require moisture to develop, and most frogs abandon their eggs once they're fertilized. In such species, male frogs often produce a release call when clasped by another male. But in some species, males and females are hard to tell apart. Many species are sexually dimorphic, meaning that there are differences between the bodies and colors of males and females. Sometimes, it's easy to tell male frogs from female frogs. Frogs can stay in amplexus for hours or even days as the female releases as few as one or as many as several hundred eggs. The male climbs onto the female's back and clasps his forelegs around her middle. In order to make sure that the sperm reach the eggs, the male and female get into a mating posture called amplexus. The female releases her eggs and the male releases his sperm at the same time. In almost all frogs, egg fertilization happens outside the female's body instead of inside. All frogs reproduce sexually, and all hatch from eggs. Only about half of all frogs follow these exact steps, but there are a few rules of thumb about frog reproduction. Frogs lay eggs in water, and the eggs hatch into tadpoles that grow into frogs. Most people learn about the basics of frog reproduction in elementary school.
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