Big-eared Climbing Rat

Big-eared Climbing Rat

Ototylomys phyllotis

Silhouette: T. Michael Keesey · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~20% · Possible
at Santa Rosa National Park
14 Verified sightings at Santa Rosa National Park From 2019 to 2026
36 Verified sightings across all 8 parks From 2019 to 2026
September Best month highest sighting rate
☀️🌙 Day & Night When it's spotted Active throughout day and night

About the Big-eared Climbing Rat

The big-eared climbing rat (Ototylomys phyllotis) is a species of rodent in the family Cricetidae. It is found in Central America from Mexico to Costa Rica. The big-eared climbing rat is in the order Rodentia and in the family Cricetidae and is most widely distributed species in the genus Ototylomys. A second species of the genus was described in 2017 from the Mexican state of Chiapas. The genus dates back 3.35 Mya, prior to the Great American Biotic Interchange and Its initial occurrence was near Honduras and El Salvador.

Ototylomys is Greek for otus (ear), tylos (knob, knot, swelling), and mus (mouse), which describes the animal's large ears and shelf-like skull. The big-eared climbing rat is a slender rat with two colors; dark on top of its body and light below. Its eyes and ears are large. It has large naked ears and a long naked tail with scales. Its size and color varies depending on where it lives geographically but most populations have a creamy white underbelly except for those in Mexico and Guatemala, which have a slate-colored underbelly. The skull is flat on top and has a prominent interparietal bone and supraorbital ridges There is no sexual dimorphism... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Santa Rosa National Park 🇨🇷 Costa Rica
~20%
2 Sian Ka'an Biosphere Reserve 🇲🇽 Mexico
~20%
3 Pico Bonito National Park 🇭🇳 Honduras
Insufficient data
4 Cerro Azul Meámbar National Park 🇭🇳 Honduras
Insufficient data
5 Calakmul Biosphere Reserve 🇲🇽 Mexico
Insufficient data
6 Tenorio Volcano National Park 🇨🇷 Costa Rica
Insufficient data
7 Palo Verde National Park 🇨🇷 Costa Rica
Insufficient data
8 Monteverde Cloud Forest Reserve 🇨🇷 Costa Rica
Insufficient data

Quick answers

What are the chances of seeing a Big-eared Climbing Rat in Santa Rosa National Park?

About 20% of wildlife watchers report a Big-eared Climbing Rat sighting in Santa Rosa National Park, based on 14 verified sightings from GBIF citizen-science data.

When is the best time to see Big-eared Climbing Rat in Santa Rosa National Park?

September has the highest sighting rate for Big-eared Climbing Rat in Santa Rosa National Park in our monthly data.

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