Figure 1. Innate fear-induced defensive responses evoked by Mesocricetus auratus confronted with the South American coral snake Micrurus lemniscatus carvalhoi (A and C), and the South American rattlesnake Crotalus durissus terrificus (B) for 5 min in a polygonal arena without a burrow. Anxiety/fear-related response: alertness (A) elicited in the presence of the coral snake. Panic attack-like responses: oriented escape (B) and freezing (C) elicited in the presence of each venomous snake.
