These include cicadas, leafhoppers, treehoppers, planthoppers, froghoppers, aphids, whiteflies, scale insects, and some other groups. The Homoptera include the aphids, scale insects, cicadas, and leafhoppers, which all have sucking mouthparts. Bats in Indiana were found to prefer beetles, moths, mosquitoes, midges, leafhoppers, and wasps. They are endoparasites in other insects, such as bees, wasps, leafhoppers, silverfish, and cockroaches. Butterflies, leafhoppers, spiders and soldier flies are particularly well represented. Aster yellows are a disease-causing bacteria carried by leafhoppers, which causes deformed leaves. Plant viruses need to be transmitted by a vector, most often insects such as leafhoppers. They sometimes visit open crop fields and take honeydew exuded by leafhoppers. The virus is transmitted via a vector (insect mechanical inoculation in plant by leafhoppers). They have also been shown to be capable of overwintering in prune leafhoppers ("Edwardsiana prunicola"). Some leafhoppers (Auchenorrhyncha) are similarly "milked" by ants. These traps are commonly used for flies or leafhoppers. In any case, these toxins have a significant on the longevity of infected beet leafhoppers. These leafhoppers were attacked, suggesting no symbiotic relationship between the two. In the Western United States, no migration of the vector leafhoppers occurs.