ngineer rat in a work helmet on a construction site. construction of a large house

mammal animal whiskers pet rodent squirrel chipmunk wildlife cat rabbit nose gerbil mouse kitten rat work helmet construction site large house cement building materials project manager blueprint excavation foundation concrete bricks mortar steel beams walls roofing plumbing electrical windows doors insulation drywall paint finish heavy machinery crane bulldozer excavator dump truck loader safety regulations hardhat visibility caution warning first aid workers contractors foreman progress completion ngineer from site