Wildlife removal starts with a species ID, because the law, the urgency, and the technique differ completely between a protected bird, a rodent with a chewing habit, and a forty-pound omnivore with opinions. Meet the big three of Dallas flues.
Chimney swifts: the protected majority
ID: cigar-shaped little birds entering at dusk; a chattering chorus at feeding time; a bracket-shaped twig nest glued to the flue wall. The situation: they literally evolved onto chimneys as forests fell, and they’re protected by federal law while nesting, no removal with eggs or young present, period. The plan: confirm, wait out the few weeks to fledging, then remove the nest, clean, and cap before next spring, they return to the same flue otherwise. Swift-friendly bonus: they eat mosquitoes by the thousands; the cap just moves them to a proper roost.
Fox squirrels: the destructive ones
ID: rapid scratching and scrambling in daylight, leaf-and-twig nests, sometimes gnaw marks on the damper or cap screen. The situation: squirrels chew, wood, mortar edges, aluminum, occasionally wiring in the chase, and a squirrel that fell in can’t climb slick liners back out. The plan: prompt humane eviction (one-way doors work well), damage check afterwards, since entry usually means a cap or screen already failed, and reinforcement so the next squirrel bounces.
Raccoons: the mothers
ID: heavy deliberate movement, mostly at night; trilling chitters if kits are present; a musky odor. A raccoon in a chimney in spring is almost always a mother with a litter on your smoke shelf. The situation: she chose well, defensible, warm, dry, and she’ll defend it. Raccoons also carry the parasite and rabies risks you’d expect. The plan: professional removal that keeps mother and kits together (eviction lighting/sound plus retrieval), never poison, never a fire, then deep-clean and sanitize, raccoon droppings are a genuine biohazard, and a heavy-duty cap.