From popular tourist spots to lagoons and beaches, Carlsbad, CA, offers habitats that draw many kinds of pests. The area's coastal cliffs and caves are home to bats, European st arlings, house finches, and swallows. These flying pests also come into neighborhoods to nest in attics, eaves, vents, and ducts. Their droppings smell strongly and draw insects. Animal feces is known to spread diseases like histoplasmosis to humans, as well. Nutria are burrowing rodents that live near bodies of water and marshes in Carlsbad. Their digging can cause problems by wearing away the banks of flood ditches and weakening home foundations.