Do lions roar while hunting (like in the movies)?

Lions roar as an act of territoriality, and defense - "this is mine, I am lion, hear me" - "stay the heck away" is what they are saying. They maintain control of their territory in that way. They also use it to communicate with each other. read more

Consider the lion roar a bit similar to how a dog barks, they bark when anyone walks by or if another dog is encroaching on their 'territory' of the back yard - it is as a threat/warning. The females of the pride, the lionesses, are major hunters, and they hunt a bit differently than the males. read more