Frogs are found all over the world, apart from some isolated islands and Antarctica. There are more than 5,000 known species of frogs and many species can be found in tropical rainforests. They are amphibians that begin life as tadpoles in the water and undergo metamorphosis to become an adult frog. They are well known for their ability to jump and the croaking noise they make. If you have ever wondered why they make this noise, keep reading to find out.
Why do frogs croak?
There are many different reasons that frogs croak, but the main reason is for the male frog to attract a mate. Males may make their call individually or in a group, called a chorus. In many species of frog the female also has a call to acknowledge the call of the male frog. Some species of frogs have adapted a territorial call to warn other males to stay away from their area. Another reason that frogs croak is prior to rain. This is called a rain call and they make this when they detect a change in the humidity levels. Some frogs can also make a high pitched noise when they are in danger to distract the predator so they can escape.
Each species of frog has a unique call. They make the croaking sound by passing air through their larynx in their throat. Most frogs amplify this sound with their vocal sacs, but some frogs lack these and have other ways of amplifying the noise.