Scratching, chirping, fluttering, odor, nesting material, or debris in the fireplace can indicate animal entry. Do not light a fire to force an animal out. Smoke and heat can injure wildlife, ignite nesting material, or push combustion products into the home.
Animal and nest removal should identify the animal, legal or seasonal restrictions, and the safest access method. Some birds are protected, and removal timing may matter. After removal, a chimney inspection can check for blockage, damage, and contamination.
Prevention may include suitable chimney cap installation after the flue is clear and the correct termination is identified. A cap must allow proper venting and should not be improvised with household mesh.