Rats!

A continued menace in Metro Boston. Since the time the first ships with settlers arrived. No fun to deal with in your home, either alive, or dead.
Integrated or Green Pest Management Keys for rat control:
1) Sanitation: Remove and deal with trash effectively, metal cans or strong plastic, in a room with tight fitting doors and concrete floors. Rats love to burrow, concrete will slow them down.
2) Exclusion: Exclude the rats from the structure by employing concrete instead of dirt or wood basement and crawl floors. Fill holes in the foundation walls with cement or metal. Use gravel in dirt areas inside and outside the foundation walls.
3) Harborage Reduction: Remove clutter inside and out to reduce areas for rats to move about undetected. Keep grass mowed and shrubs trimmed 18″ off the structure. Remove debris around the structure. Inside stored items should allow access to all perimeter walls, so keeps stored items 18 to 24 inches away from the walls.