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Escaping the Heat

A Mountain Viscacha escapes the mid-day sun on a rocky outcrop near Las Cuervas, on the road to Lauca National Park, Chile.

 

At first glance, one might question the Mountain Vizcacha’s heritage – are these mammals part of the Leporidae family (rabbit) or the Chinchillidae family (Chinchilla)? If you guessed the latter, you are correct. With their large ears, powerful hind legs, and small front paws, Vizcachas do share a striking resemblance to the rabbit family. However, their long bushy tail is a distinguishing trait unique to the Chinchillidae family. This tail not only serves as a species indicator, but can also tell us if the animal is feeling anxious or relaxed: The tail is extended when the rodent is distressed and curled when at ease.

 

The Chinchillidae family resides in areas throughout southern and western South America. The members include the Mountain Vizcacha (Lagidium viscacia), Plains Vizcacha (Lagostomus maximus), Northern Vizcacha (Lagidium peruanum), Wolffsohn’s Viszacha (Lagidium wolffsohni) and the familiar Chinchilla (Chinchilla lanigera). However, the Mountain Vizcacha is the only member that calls the future Patagonia National Park home, where they live among rocky outcroppings and boulders. It is quite unusual for a rodent to stray from underground burrows, but the Vizcacha has learned to transcend its inferior digging abilities and take advantage of its expert climbing skills. The Vizcacha can jump from rock to rock with such ease and speed, it’s hard for the eye to follow.

 

Mountain Vizcachas live in colonies that range from a few individuals to hundreds. To keep up with the colony chatter, they have acquired an impressive repertoire of vocalizations that are used in social interactions. Mountain Vizcachas are small mammals, but these vocalizations resonate with plenty of strength; it’s no wonder they are known for their gregarious behavior.

 

Photo taken about 2km northwest of Las Cuevas, on the way to Lake Changara, Chile.

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Uploaded on August 28, 2016
Taken on April 3, 2016