If you’ve ever heard a high-pitched ‘EEP’ while hiking in the Rocky Mountain National Park, chances are you may have been yelled at by a pika. These small rodents are native to Asia and North America, and despite their annoying yelling, are still largely beloved by visitors thanks to their adorable appearance.

Unfortunately, a new study shows that the pika population in Rocky Mountain National Park is experiencing a sharp decline, potentially leading to their complete disappearance in some areas.

Here is a closer look at what the study claims, the cause behind the pika’s shrinking population, and why their disappearance may have a massive impact on local ecosystems.

Pikas May Soon Stop ‘Yelling’ At Rocky Mountain National Park's Hikers

Pikas are the smallest members of the lagomorph

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