There are several different animals that could take over your attic and call it home. There are a couple ways to tell what critter is living in your attic. The best way is obviously seeing them enter or leave your attic however due to the nature of wildlife that probably wont happen. They are typically cunning, smart and elusive creatures that take refuge in attics across the globe. Therefore seeing them is rare. The next best thing would be to go into the attic and examine the feces to determine what kind of animal is up there. Lastly, and probably most likely you will be listening to what time of day you hear the noises and narrowing it down from there. Let’s discuss the most common types of animals to enter attics and when you will hear them. Squirrels are diurnal so if you hear noises during the day especially early morning or dusk you more than likely have squirrels residing in your attic.  Raccoons are nocturnal and most of the noise you will hear will be at night as they exit and enter the attic in the nightly rounds for food.  They are big animals so you will hear loud stomping and scampering. Also, raccoon babies are very vocal so if you hear any chirping, squeeking or the like there are probably babies up there. Rats are also nocturnal you will here them scratching and scampering around during the night.