Heck yeah, I know that's the trick. But time is always an issue for me. I know I would do a lot better to just sit in my bamboo groves and wait for the tree rats, but it's extremely difficult for me to do when I am thinking the whole time about the 100 other things I really need to be doing.
That's why I like a semi auto shotgun. Fire one shot up into the tree where I think the squirrel is hiding, then fire the next shot when he spooks and jumps out from behind the tree limb.
This winter I am going to set up a bait field of corn cob at sight in distance from my shooting bench. In the winter I have more time to spend, so I will sit there and just wait for the tree rats to come for breakfast. I'll probably use my Winchester Heavy Varmint in .220 Swift for that job since I'll be shooting from a rest.