Do you like waking up to the sound of birds in the morning?  Though this may be your preferred version of an alarm clock, I recommend screening openings in soffits on the exterior of your home to safeguard against bird and animal activity/intrusion.  If you see bird droppings running out of soffit vents, there’s a chance birds are getting into your attic and the soffit vent likely needs to be re-screened.  Don’t just cover it, as this can lead to elevated moisture in the attic.