Some kingfishers nest in arboreal termite nests. Nests are arranged in colonies consisting of about three to 15 nests each. Intraspecific brood parasites are common in common starling nests. Juveniles have also been observed climbing into nests and capturing birds. Most termites construct underground colonies rather than multifunctional nests and mounds. They are predators of sea turtle nests. Often, maned wolves defecate on the nests of leafcutter ants. The red-winged blackbird nests in loose colonies. Fox squirrels have two types of shelters&colon; leaf nests (dreys) and tree dens. Hornets have stings used to kill prey and defend nests. The peregrine falcon nests in a scrape, normally on cliff edges. Fungi such as "Penicillium" infect loggerhead sea turtle nests and cloacae. They have been observed dropping stones on potential predators that venture close to their nests. They make very small, exposed nests in trees and shrubs. Pairs with parasitized nests have less reproductive success.