Harlequin Trojan horse Herbal Insect Pest Keep watch over
Harlequin bug Harlequin bugs are shield- shaped, have black-and-orange or black-and-red triangles on the back, and are about ¼-inch long. The harlequin bug is a type of stink bug; it releases a foul odor when disturbed. Harlequin bugs–also called shield bugs–suck plant sap from cabbage-family crops and other vegetables. Harlequin bugs overwinter in garden debris