Birds can live in many areas in or around your home. Nesting in vents, eaves, and attics. Sometimes behind a porch light, lawn furniture, and bushes near doorways. Usually breeding in late spring, birds can become threatened if a person gets too close to the nest. They may chirp loudly, swoop, and even dive at a near by person. If residing in a vent, a homeowner may notice a horrible odor. They may also notice flies, nesting, or fleas in that area. Bird feces carry many disease, the most commonly known is Histoplasmosis.