The study found that rats reacted differently to male and female pheromones. Regardless of risk, rats — particularly males — were observed to “scout out” areas with male pheromones, often later avoiding them. Areas sprayed with female pheromones, however, were visited significantly more often than male-sprayed areas.

— Can rat pheromones solve New York City's rat problem? Read more in Fordham Research Repels NYC’s Rodents at Fordham Observer.