Fire Salamander (Salamandra salamandra)

Fire Salamanders have black skin and bright yellow or orange markings, which deter predators. They live in the forests of Central and Southern Europe, where they spend their days hiding in logs, rocks, or burrows. 

Its main toxin, samandarin, triggers severe muscle convulsions, hypertension, and hyperventilation in vertebrates. Further analysis of its skin secretions revealed another alkaloid called samandarone5.