According to New Scientist, there are several varieties of venomous lizards, but the presence or absence of a blue tail isn't enough to determine which lizards are poisonous and which ones are not. In fact, as recently as 2005, there were thought to only be two types of venomous lizard.
New Scientist states that up until 2005, only Gila monsters and Mexican bearded lizards, both of which can have bluish tails, were believed to be venomous. However, based on research that was published at that time, it's believed that most monitor lizards and iguanas also produce venom. Before 2005, scientists erroneously blamed inflamed or deadly bites from iguanas and monitor lizards, including Komodo dragons, on the lizard's mouth bacteria instead.
Though not an issue for humans, American five-lined Skinks are toxic to pets and other animals. They are one of the most common lizards on the east coat of the United States, and young five-lined skinks do have a noticeable blue tail. When ingested, these lizards can case Peripheral Vestibular Disease in animals. Though debilitating to the animal, it is usually not a lasting condition, but a vet consultation may be merited if a pet has come into contact with one.Learn More
According to Reptiles Magazine, the green iguana can reach lengths of over 6 feet and weigh approximately 11 pounds. The green iguana lives in rain forests covering northern Mexico, Central America and southern Brazil. It is also found on the islands of the Caribbean.Full Answer >
According to the National Wildlife Federation, chameleons protect themselves by changing colors to blend in with their environment. Chameleons move extremely slowly, so their best defense is their ability to camouflage themselves.Full Answer >
Green Iguanas may grow to be 6 feet long and require habitats large enough to move around in. They are comfortable at temperatures in the range of 85 degrees. Green Iguanas are herbivores and subsist on plants, fruits and vegetables. They require a great deal of UVB light, that must be supplied to them for at least 12 hours each day. Do not house two or more iguanas together.Full Answer >
Yellow spotted lizards do exist and are typically found in warmer climates like Texas and parts of Central America. The official name for this species of lizard is the Lepidophyma flavimaculatum, or yellow-spotted night lizard. These lizards reach up to 5 inches in length, making them the largest of the night lizard species.Full Answer >