A 12-year-old Icelandic sheep living on a property in Hunterdon County, New Jersey, was found in 2017 to be infested with numerous ticks of the species Haemaphysalis longicornis (shown above in a closeup of the sheep’s ear). Further investigation found a large infestation of H. longicornis, in multiple life stages, on the property. The tick species is native to Asia, and the appearance in New Jersey marks the first potentially established population of the species ever documented in the United States. (Image originally published in Rainey et al 2018, Journal of Medical Entomology)