When something is moving above your ceiling, the time of day and the sound are your best clues. Here is how to read them before you call.

Listen to the time of day

Animals that move at sunrise and sunset are usually squirrels, which are active in the daytime. Noises that start after dark point to raccoons, flying squirrels, rats, mice or bats.

Listen to the sound

Light scampering is usually mice or squirrels. Heavy thumping and dragging is a raccoon. Squeaking and fluttering around dusk is often bats. Scratching in the walls at night is usually rats.

Look for signs

Check the soffits, vents and roof edges for chewed holes and stains. Droppings, torn insulation and a smell like ammonia are common signs of a longer stay. Stay out of the attic if you cannot do it safely.