Large-eared pika - Wikipedia

Natural history

Ochotonidae — Wikipédia

Pikas at Rocky - Rocky Mountain National Park (U.S. National Park Service)

Pika, Small Mammal, High-Altitude Adaptation & Conservation

Nature, Pika Builds Nest to Survive Long Harsh Winter, Season 35, Episode 12

American Pikas - Bandelier National Monument (U.S. National Park Service)

Washington's Pikas Are In Even More Trouble Than We Thought - OPB

American pika disappears from large area of California's Sierra Nevada mountains

The Pika Predicament: Wildlife & the Climate Crisis - The National Wildlife Federation Blog

The Mighty American Pika