The Earless Monitor lizard like most lizards doesn’t have ears but these lizards also don't have a visible hole in their head. All lizard species can hear including these lizards even though it is not as keen as a human’s hearing. Their hearing is similar to a snake’s, the sound has to be loud for it to notice. They also have a forked tongue that flick out like snakes do. Citation and more information at https://en.wikipedia.org/wiki/Earless_monitor_lizard
