Frogs primarily croak to advertise their fitness to perspective mates. The males are responsible for the vast majority of the croaks heard in a typical chorus, but the females of some species can also create vocalizations. When a female hears a frog with an attractive call, she approaches him and allows him to mount her and achieve amplexus.Know More
Every species of frog has a distinctive call. This allows males and females of the same species to find each other, breed and produce viable offspring. In fact, some frog species are visually identical, and they were thought to be a single species until their calls were analyzed, indicating that two species were masquerading as one.
Sometimes, an over-anxious male grabs another male and attempts to breed with him. When this happens, the male mistaken for a female then produces something called a release call. Release calls instruct the mounting frog that he has mistakenly grabbed an inappropriate mate.
Some frogs also make vocalizations when they are grabbed by a predator. This is called a predator call, and both sexes are capable of producing these sounds. Such sounds are thought to startle the predator, or in the case of snakes and other animals that cannot hear, attract secondary predators. These secondary predators may attack the primary predator, allowing the frog to escape.Learn more about Frogs
Different frogs have different adaptations, but generally frogs have eyes on the top of their head for seeing out of the water, a long, sticky tongue for capturing prey such as insects and sensitive skin for absorbing water and oxygen. According to BioWeb ULAW, many frogs such as the Northern Leopard Frog have powerful legs that help them adapt to their environment both by jumping in a zigzag pattern to avoid being eaten on land, and also for swimming skilfully enough to catch their own prey in water.Full Answer >
In frogs and all vertebrates, the function of the pancreas is to produce endocrine hormones and digestive enzymes. The pancreas produces insulin, somatostatin and pancreatic polypeptides for the endocrine system, as well as pancreatic juices that break down lipids, proteins and carbohydrates in the stomach.Full Answer >
Even when they sleep, frogs do not close their eyes. Frogs do, however, have eyelids that blink to protect their eyes from dirty residue and preserve moisture. Frogs also have a third eyelid, called the nictitating eyelid, that facilitates a clear view when swimming underwater or on land.Full Answer >
The poison-dart frog, the common name assigned to over 175 known species of the Dendrobatidae family of frogs, is endemic to the humid, equatorial zones within South and Central America. Habitats range from freshwater lakes and swamps to tropical high-altitude shrublands and lowland forests.Full Answer >