The answer to 'pest swarms' is that pest swarms are typically caused by an infestation of insects or other pests. Symptoms may include seeing large numbers of the pests swarming in a specific area, or noticing damage to plants, food sources, or structures. Solutions can vary depending on the type of pest, but may include using insecticides, removing food sources, or sealing entry points.
If the swarm is large or difficult to control, it's best to call in a professional pest control technician. They have the expertise and equipment to safely and effectively eliminate the infestation. DIY methods may work for smaller swarms, but can be risky and less effective if not done properly.