No, not all excavators have wheels! There are different types of excavators, and they can have tracks or wheels.
1. Excavators with Tracks: These are the most common type and are usually used for big jobs, like digging in the dirt or lifting heavy things. The tracks help them move on soft or muddy ground, just like a caterpillar crawls on the ground.
2. Excavators with Wheels: Some excavators do have wheels instead of tracks. These are often used in places with smooth and hard surfaces, like a parking lot or a city road. They can move faster on these surfaces.
So, in short, some excavators have wheels, but a lot of them use tracks. It all depends on where they need to work!