"I hear something in my attic." It's one of the most common calls we get, and it's also one of the trickiest to diagnose over the phone. After years of crawling through attics across the Triangle, here's how we actually narrow it down — and why the sound alone can fool you.
Why You Can't Trust How Loud It Sounds
The first thing to understand is that how loud an animal sounds has very little to do with how big it is. Two things are working against you.
First, people's perception of sound varies a lot. What one person swears is a huge animal, another barely notices.
Second, and more importantly, the construction of your home changes everything. The thickness of your drywall, the size of your ceiling trusses, and especially where your insulation sits all affect how much a sound reverberates. A home with insulation at the roofline and an open ceiling below will carry sound dramatically louder than a home insulated the traditional way, down between the ceiling joist bays. The exact same animal can sound like a mouse in one house and a monster in another.
That's why I give homeowners this rule of thumb:
If it sounds like a squirrel, it may be a mouse.
If it sounds bigger than a squirrel — like a raccoon — it's probably a squirrel.
If it sounds like an elephant, then it's a raccoon.
It gets a laugh, but it's genuinely how the acoustics tend to shake out.
Time of Day: Your Most Reliable Clue
Because loudness is so unreliable, the single most useful piece of information is when you hear the noise. Each animal keeps its own schedule.
Gray squirrels are daytime animals. You'll hear intermittent activity, especially in the early morning and mid-morning, then again in the mid-to-late afternoon. Daytime scurrying and rolling or thumping sounds are almost certainly gray squirrels.
Flying squirrels run on the opposite clock. You'll hear them at dusk and at dawn, with a little activity through the night. If the noise kicks up right as the sun goes down, flying squirrels move to the top of the list.
Bats can be heard at various times, but when people hear them in the attic it's usually during the day, when they're on the drywall shifting around. The sound is a light, faint scratching — much subtler than a squirrel.
Mice are typically a nighttime sound, though you can hear them during the day too. Mice are the trickiest, because they can produce a wide range of sounds, which is exactly why a "squirrel" so often turns out to be a mouse.
When It Sounds Like a Bird
Birds are often easy to identify, because you'll hear distinct chirping. But not always. Sometimes a bird is walking on the drywall, pecking at it, fluffing its wings, or flying around the attic, and that can make for an odd sound that doesn't register as "bird" at all.
Here's one that surprises people every spring: raccoon kits. Baby raccoons make a strange, high-pitched sound that doesn't sound like what you'd expect from a raccoon at all. People very often mistake it for birds. So during heavy raccoon maternity season in the spring, we'll get calls about weird bird-like sounds in the attic, and it turns out to be a litter of raccoon kits a few weeks old, calling for their mother. If you're hearing odd chirps up there in spring, don't rule out raccoons.
The Bottom Line
The sounds in your attic are real clues, but they're easy to misread on your own, because your house is changing the volume and your ears are filling in the rest. Pay attention to the time of day more than the loudness, and note whether it's scratching, scurrying, thumping, or chirping.
Better yet, let us take a look. A proper inspection tells us for certain what's up there and, just as importantly, how it's getting in. If you've got a mystery noise overhead, give Piedmont Wildlife Control a call.
