Monitors (not monitor screens) are lizards that come from the
family Varanidae. you can find many different species of monitors
from ones that are 10cm long that fit in the palm of your hand to
the famous Komodo dragons that grow to lengths of 3m (10 foot).
Most monitors are terrestrial, there are monitors that live
mangroves to the deserts in Africa. If you are trying to say they
are iguanas, monitor lizards ARE NOT IGUANAS (different family of
lizard) !!!!!!!!!!!!!! ;[