Repellent-resistant
Guides
Lipoptena cervi
Deer Ked, Deer Fly, European Deer Ked
Lipoptena cervi is a blood-feeding ectoparasitic fly in the family Hippoboscidae, commonly known as the deer ked or European deer ked. Native to Eurasia, it has been introduced to North America and is now invasive in the northeastern United States. Adults are initially winged but shed their wings after locating a host, becoming permanently attached to cervid mammals. The species is a significant nuisance to hunters, hikers, and deer processors due to its persistent biting behavior and apparent resistance to common insect repellents.