I don't get why it is Russell with the paper bag in his head. Help

I get almost all the other "what do you call…? jokes, but I just don’t seem to get this one.

Rustle.

Correct. And I believe his head is in the paper bag, not vice versa.

Although that way could work, too.

I thought Russel was the guy with no arms and no legs in a pile of leaves.

Me too!

THAT one I got and made more sense.
Danke schön für alles

The way I heard it was, “What do you call a guy with no arms and no legs who steals cattle?”

“Russell.”

In that case, what do you call a guy who does have arms and legs who steals cattle?