We can expect zombies to adapt to different hunting strategies when they are seeking out brains to eat. There are four or five possible techniques they may use depending on how much cognitive function a particular zombie has.
Simply waiting for some tasty human to walk pass it the most basic technique. The ambush does not require much skill but needs patience, something zombies have stacks of. The smarter ones will learn to hang around shops and apartment blocks where humans are more like to scavenge in.
Bite off more than you can chew