Ant

Ants can be found swarming garbage.
Ants are easy to catch. To get an ant take some garbage drop it on the ground and go into a building. Then leave the building and go to where you dropped the garbage and chances are there will be ants on it. Then all you have to do is swing your net and catch it. If by any chance that ants arn't on the garbage go inside another building and leave again. Repeat that process until there is some ants on the gabage.