In the field, tiger beetles basked and maintained body temperature (Tb) between 33-38.degree. C while searching for prey and mates. Time spent searching and searching speed were positively correlated with Tb and, to a lesser extent, with surface temperature. In the laboratory, running speed was positively correlated with Tb. The minimum Tb for flight ranged from 22-26.degree. C. At high ambient temperatures Tb was modulated by stilting and short flights which promoted convective cooling. High body temperature increases the distance that a tiger beetle can search and may enhance encounter rates with prey and mates.