Lethal male–male interactions in Eurasian lynx

Eurasian lynx (Lynx lynx) is considered a solitary, territorial felid with a low degree of direct intraspecific interactions. Between 2002 and 2011 we observed four aggressive interactions between five different male Eurasian lynx, where two were lethal. All interactions occurred during the mating season and three of the interactions resulted in takeover of the home range by the intruder. Thus, in this study we demonstrate that aggressive interactions, sometimes with severe consequences, occur in male Eurasian lynx and suggest that they are driven primarily by access to female lynx in the mating season.