The large glue traps work good on rats. I've had luck with snap traps (I use raisens for bait or the unbaited variety with the yellow platform work well too), always place the traps or boards along a wall as these little bastards (rats and mice) follow the walls if given a choice. I've had decent luck with the poison pellets too. I had an infestation in my attic before I got the roof sealed up and probably caught 50+ rats over about 2 years. Rat free for 5 years now in attic but still nail a few outside. Live near wild area so lots of rats and mouses around. Along with coyotes, foxes, possums, bobkittys, skunks, rabbits, squirrells, grizzly bears. Glue boards don't work that good on the last group. j/k on the gb to see if you're paying attn. :smile:
And I just remembered if you use snap traps the best bait in the world is CHUNKY peanut butter. It has to be chunky though, and fresh.