How to catch a critter Part 1

Trying to catch a critter that has been living under my house. We think it's a possum. Cats and other animals have been finding their way under the house through the same openings made by this critter. But, we must get rid of all critters before we can seal up the vent screens that they got through. So, trying to catch it with a trap, and using some bate to draw it out and into the trap.