Boomie learned from our old dog, Maggie, that there are lizards to be found around the bushes. He never learned how to catch them, though. He smells them, and probably sees them and hears them as they scuttle and slither through the branches trying to evade him.
He was trying so hard to find this one, and he came pretty close, but in the end, I don't think he actually saw it.
But I did.