prowl

To rove over, through, or about in a stealthy manner; especially, to search in, as for prey or booty.

Watch the lioness prowling in the shrubbery for zebras.

It's easy to sneak vandalism into Wiktionary as there are few other users prowling the Recent Changes page.

To idle; to go about aimlessly.

That dandy has nothing better to do than prowl around town all day in his pinstripe suit.

To collect by plunder.

to prowl money

The act of prowling.

I'm going on a midnight prowl.