Ok... so apparently, I do not have a rodent problem.
The wires running to my house are pulling on the fascia board because branches are being blown onto the wires.
He said the sound wouldn't be constant if it was a rodent. It would also be more of a scratching sound.
He made me listen and it did sound like flexing wood.
So not an emergency, but something we can take care of this weekend.
He also said if I hear scratching or get an odor near the wall he will deduct the cost of his visit for the removal of the animal.