http://www.newsweek.com/deadly-highly-contagious-fungus-spreading-amphibians-worst-history-1788637

A highly contagious and deadly fungal disease—considered the worst to affect wildlife in recorded history—is spreading, placing amphibians across an entire continent at risk.

The fatal disease, known as chytridiomycosis, is caused by a microscopic fungus called Batrachochytrium dendrobatidis (Bd). Infection with this fungus has a devastating effect on frogs, toads and other amphibians.