~ I used to catch flies in my hand as a kid, wrap a strand of hair around their neck and let them fly around in circles, for fun. When you’re done, just tighten the noose and their head pops off.
~ Ants follow their leader. They have little choice of selection. They are led by chemicals. You need to manipulate their leader, for the ants to do as you intend. If there is a large colony of ants walking up your wall… all you need to do is give them a sense of danger. If you blow on them at certain points and give them time, they all go away, and no death needs be done. Then block their entry and exit points, and ants stay out.
~ If you want ants to follow a certain path… just draw a dark line as a path to redirect them… Start the line parallel with their natural path then curve it around to across their path and create a new one… it works. They will follow the line until one smart ant attempts crossing it at a break point, and the others follow eventually. I did this on a tree with a medium point sharpie. A few months later, the ink was gone, but there was an embossed relief of my new ant path remaining on the tree.