This invasive tick can clone itself and suck livestock dry

In its native East Asian range, the longhorn tick spreads potentially fatal human diseases

longhorned tick adult and nymph next to a dime

BLOOD SUCKER Scientists have discovered the longhorned tick, an East Asian species of cloning tick (like this adult and nymph pictured next to the rim of a dime), in four continental U.S. states this year.

J. Occi/Rutgers Center for Vector Biology

Tadhgh Rainey has seen his share of bloodsuckers.