The answer to carpenter ant swarms is that they are a common pest problem caused by a colony of carpenter ants establishing a nest in or around your home. Carpenter ants are attracted to damp, decaying wood and can cause significant structural damage over time. Symptoms of a carpenter ant infestation include seeing large black ants, sawdust-like wood shavings, and finding nests in walls, floors, or woodpiles.
To address a carpenter ant swarm, you can try DIY methods like using baits and sprays to target the colony. However, for a major infestation or if the ants are causing structural damage, it's best to call in a professional pest control technician. They can properly identify the species, locate the nest, and use targeted treatments to eliminate the colony.