Livestock-toxicity
Guides
Epicauta
Burning Blister Beetles
Epicauta is a large genus of blister beetles (family Meloidae) comprising approximately 360 described species. The genus exhibits a nearly cosmopolitan distribution, with native species on all continents except Australia and Antarctica. Adult Epicauta feed on plant foliage and flowers, while larvae are predatory specialists on grasshopper eggs. The genus is notable for producing cantharidin, a toxic terpenoid compound that serves as a chemical defense and can be lethal to vertebrates if ingested in sufficient quantities. Many species are significant agricultural pests, particularly of alfalfa and other forage crops, with documented cases of crop failure and livestock mortality from contaminated hay.
Tegrodera
iron cross blister beetles, iron cross soldier beetles, soldier blister beetles
Tegrodera is a North American genus of large, colorful blister beetles in the family Meloidae, comprising three allopatric species. The genus is confined to arid and semi-arid regions of southwestern North America, with each species occupying distinct geographic ranges separated by major desert barriers. Adults are conspicuous and often form immense feeding and mating aggregations. All species contain cantharidin, a defensive compound toxic to mammals. The genus is notable for unique male courtship behavior involving antennal grasping and stimulation.