Frank Welker is some kind of voice acting/foley artist genius. If you hear a non-human voice or animal noise in a movie, it's probably Frank Welker.
He was the Gremlins in *Gremlins*. The Basilisk in *Harry Potter*. The whale in *Finding Nemo*. He's everywhere and he's so good at what he does. There's no one like him.
Fun fact: Frank Welker is also the voice of Megatron. Dude has range.
edit: am dumb, other cybernetic being.
frank welker was also Abu in Aladdin. this dude is one of the many voices of childhood.
Frank Welker is a voice acting God. Generally, when people talk about the best voice actor, they tend to say it's Mel Blanc. While Blanc is amazingly amazing and Looney Tunes/Merrie Melodies couldn't have existed without him, I think Welker wins just on variety and longevity.
I think it was on the Futurama commentaries, but they mention working with Frank Welker. In one scene they told him they needed him to make the sound of some ducks quacking for background and he asked, "How many?"
As a person who lives in a country with quite a few lions, it's pretty clear that very few people (even here!) know what their roar sounds like. It's pretty weird. Super eerie. I think we probably have a species memory. But it's not a roar the way people imagine. And I'm guessing the film producers don't like that much.
It's a sort of bassy "HEEEE-YEUGH" with a decending pitch on the second part. And it's used to communicate. Not in anger. Lions snarl and growl when angry.
Everyone talks about the characters he voices but that's not really his specialty. it's the random noises... like lions roaring that he does better than anyone else.
[Here's the opening to the original scooby doo in 1969](https://www.youtube.com/watch?v=776rvGHfzuM
). Those bats that flyby before the song start's? that's him. In the age before synthesizers and you needed the sound of a flock of bats what does that sound like? and how do make that sound? You call Frank Welker.
I thought I remembered reading that they used tiger sound clips...