Chrotopterus auritus
Silhouette: Edwin Price · PhyloPic
In 3 days ~60% in a week ~90%
The big-eared woolly bat or (Peters's) woolly false vampire bat (Chrotopterus auritus) is a species of bat, belonging to the family Phyllostomidae. The name Chrotopterus is derived from Greek roots chariots (skin, color), and pteron (wing). The epithet auritus refers to the large ears.
Big-eared woolly bats are very large predatory bats, the second largest bat species in the neotropics. Their body mass typically ranges from 75 to 96 grams (2.6 to 3.4 oz). The length of the forearm ranges from 79 to 83 millimetres (3.1 to 3.3 in). There are only three New World phyllostomid bats of comparable size. The dorsal hair is about 12 millimetres (0.47 in) long, which is longer than that most of phyllostomid species. They also possess two lower incisors, a trait typically shared with smaller bats.
Big woolly-eared bats live in warm subtropical forests, usually roosting in caves and hollow logs, where prey is returned to before consumption. Geographically, they are found in southern parts of Mexico and extend through Northeastern South America, being found as far south as northern Argentina. They are typically found in areas that also host many other... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Emas National Park | 🇧🇷 Brazil | |
| 2 | Calakmul Biosphere Reserve | 🇲🇽 Mexico |
No species of the same family or order lives in Emas National Park, so these are its closest relatives here: other mammals.
Possible
About 30% of wildlife watchers report a Big-eared Woolly Bat sighting in Emas National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 11th most-seen of the 15 mammals we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
March, July–August and October
In those months about 40% of wildlife watchers report a Big-eared Woolly Bat in Emas National Park on a given day, against under 5% in February, April–June, September and December, the lowest months.
Between 5 and 8 pm
Across all the parks we cover, that three-hour window holds the most Big-eared Woolly Bat sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Yes
Of the 2 parks where we can rate Big-eared Woolly Bat sightings, Emas National Park has the highest daily chance: about 30%. Next come Calakmul Biosphere Reserve (Mexico, about 10%).
GBIF citizen-science records
It is estimated from how often the Big-eared Woolly Bat is recorded against all the mammals logged in Emas National Park (7 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
