Gizmo is a critter chaser, regardless of the size.
An ant, a mosquito, a spider, a beetle....Even frogs and toads don't stand a chance (granted if I see he's after a frog or toad that's when I step in).
But I know if I see his head moving up and down with a crazed look in his eye and randomly biting at the air that there must be some "threatening" object that's coming into his domain!
