Sometimes, the entry points can be so discreet and hidden out of view. I mean, I wouldn't want to be seen by the homeowner, or predators out there either, so the best thing to do is hide. Considering the attic shields many nuisance wildlife from various weather conditions, it's only appropriate they take comfort in your home.
If find yourself unsure of the noises you have been hearing in the attic, or suspect animals coming and going with similar patterns to certain areas, call an expert wildlife technician to come out and do an inspection. The more proactive you are can mean the difference in the cost it could be down the road if the damage is caused by an unwanted attic guest or guests.
All Around Animal Control
EXPERTS IN WILDLIFE CONTROL & MANAGEMENT