Question: I was wondering about daddy long legged spiders.  We have a lot of them outside of our house and it seems that where they hang out there are now tiny brown spots on our siding.  Do they leave marks or feces behind??  Or is it from digestion?  It just seems to be wherever the daddy long legs are or hang out.

 ANSWER  The spots from daddy long legs are fecal deposits.

Daddy longlegs are not actually spiders. They are predators like spiders, and feed primarily on insects and some may eat plant material.  They are usually found outdoors and near outdoor lights  because the lights attract insects and the daddy longlegs can find plenty of food there.

Control of daddy longlegs can begin by reducing the outdoor lights at night, then using a broom to move them away form the door.  They don”t bite people or pets and are rather harmless.