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Euchaetes
tussock moths, milkweed tussock moths, milkweed tiger moths
Euchaetes is a genus of arctiine tussock moths in the family Erebidae, described by Thaddeus William Harris in 1841. The genus includes species commonly known as milkweed tussock moths or milkweed tiger moths, many of which are specialized feeders on milkweed plants (Asclepiadaceae). Caterpillars of well-known species such as E. egle sequester cardiac glycosides from their host plants, making them unpalatable to predators. Adults of some species have evolved ultrasonic acoustic defenses against bat predation, representing a notable example of acoustic aposematism.