The tiger salamander (Ambystoma tigrinum) is a species of mole salamander and one of the largest terrestrial salamanders in North America.These salamanders usually grow to a length of 6–8 in (15–20 cm) with a lifespan of around 12–15 years. They are characterized by having markings varying in color on the back of their head, body, and tail. The coloring of these spots range from brownish yellow to greenish yellow, while the rest of their back is black or dark brown. They have short snouts, thick necks, strong legs, and lengthy tails. Their diet consists largely of small insects, frogs, and worms, although it is not rare for an adult to turn cannibalistic and consume its own kind. Cannibalism in these salamanders can almost always be traced back to a large volume of competing predators and lack of prey in the area.
Illinois citizens voted for the eastern tiger salamander as state amphibian in 2004, and the legislature enacted it in 2005.