A colony of oleander aphids, Aphis nerii, feeds on milkweed in Iowa. Like monarch butterflies, these insects extract heart-stoppingly toxic chemicals called cardiac glycosides from milkweed and store them as a defense mechanism.
Mating Twice-stabbed Stink Bugs, Cosmopepla lintneriana, in Wisconsin.
Plant bug nymph (Miridae) from Iowa.
