Each year, male Western fence lizards bob, charge, and battle rivals for a chance to win mates. For many of them, tick infestations threaten to hinder their best efforts by harming the lizards’ health. But just how harmful is tick parasitism for these unfortunate lizard hosts? In their recent research, Dylan Lanser, Dr Larisa Vredevoe, and Dr Gita Kolluru at California Polytechnic State University aimed to answer this question by staging contests between tick-free and tick-infested lizards.