They are commonly seen in hardwood forests and are a familiar sight to lumberjacks. The female dies immediately after laying her last egg, leaving her ovipositor stuck in the tree and becoming a potential meal herself.
There is only one Tremex species in North America. The larvae are actually victims of parasitism despite the measures the female takes to safeguard them. Female Ichneumon Wasps lay their own eggs in the bark also using an ovipositor of their own. When the wasp larvae hatch, they slowly eat the Pigeon Tremex larvae. Surviving larvae emerge as adults in the fall.