Frogs are well known for their coiled, sticky tongue which they project out of their mouths to catch insects. Frogs are also well known for being able to breathe through their skin as well as their lungs.
Frogs are found all over the world with the exceptions of the polar regions. Although this is the case, many of the 5,000 frog species are found in the tropical rainforests of the southern hemisphere in places like South America and Indonesia.
Frog populations of certain frog species are severely declining mainly due to deforestation and climate change. Frogs are very susceptible to atmospheric changes and many frog species, therefore cannot exist outside of their native habitat.
Many species of frog, particularly those species of frog living in the tropics, are known to contain chemicals that are poisonous to make the frog inedible for potential predators. The levels of poisons within different frog species differs from mild amounts of poison to large amounts of poison, which can end up being deadly for those animals that eat it.