White-Nose Syndrome | ErrorZap

Cutaway illustration of hibernating bats roosting in a cave, with a bearded host wiping his boots on a decontamination mat outside a locked gate.

Bats, White-Nose Syndrome, and Why Grand Canyon Caves Stay Shut

A cold-loving fungus that has killed millions of bats nationally was confirmed in Arizona in 2025, and Grand Canyon’s caves are built to keep it out.

Cutaway illustration of Cave of the Domes inside Horseshoe Mesa with a locked gate at the entrance and hibernating bats on the ceiling

Cave of the Domes: the last open cave, and why bats closed it

The one Grand Canyon cave you didn’t need a permit for survived a hantavirus scare but not white-nose syndrome.