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.
Wildlife Management
Little Park: the North Rim's Bison Capture Corral
A closed North Rim meadow hides a livestock corral built to catch wild bison descended from a 1906 failed cattle-crossbreeding scheme.
Wildlife-management infrastructure: corrals, weirs and field tests
How Grand Canyon managers use bison corrals, fish weirs and research exclosures—and why the regional condor release pen is outside the park.