Hipposideros grandis
Silhouette: T. Michael Keesey · PhyloPic
In 3 days ~70% in a week ~90%
The grand roundleaf bat (Hipposideros grandis), also known as the grand leaf-nosed bat, is a species of bat in the genus Hipposideros. It can be found in China, Myanmar, Thailand, and Vietnam. Per George Henry Hamilton Tate, it was described as a new taxon in 1936 by American zoologist Glover Morrill Allen.
Allen listed it as a subspecies of the intermediate roundleaf bat (Hipposideros larvatus). The holotype was collected in Chindwin, Myanmar. It was frequently listed as a subspecies until 2006, when analyses of its echolocation and morphology demonstrated that the grand roundleaf bat is distinct enough to be considered a full species.
Males have a mean forearm length of 60.5 mm (2.38 in), while females have a mean forearm length of 61 mm (2.4 in). Males weigh 18.3 g (0.65 oz), while females weigh 17.6 g (0.62 oz). In India, the species has a peak echolocation frequency of 98 kHz, which helps distinguish it from other Hipposideros species.
This species is found in several countries in Asia, including China, Myanmar, Thailand, and Vietnam. It is also found in India. As of 2016, it is evaluated as a least-concern... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cat Tien National Park | 🇻🇳 Vietnam |
More parks will be added in future updates.
Possible
About 30% of wildlife watchers report a Grand Leaf-nosed Bat sighting in Cat Tien National Park on a given day, based on 24 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 12th most-seen of the 28 mammals we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
December
In that month about 50% of wildlife watchers report a Grand Leaf-nosed Bat in Cat Tien National Park on a given day, against under 5% in January, April–May and August–October, the lowest months. That is one of Cat Tien National Park's driest months, with about 55 mm of rain against 490 mm in July.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Grand Leaf-nosed Bat sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Only Cat Tien National Park, in our data
Cat Tien National Park is the only park on Wallace's Line with enough records to rate Grand Leaf-nosed Bat sightings: about 30% of wildlife watchers there report one on a given day.
Same order: Chiroptera
The closest relatives of the Grand Leaf-nosed Bat that you can see in Cat Tien National Park (order Chiroptera, Bats) are Woolly Horseshoe Bat (about 20%), Greater Short-nosed Fruit Bat (about 20%) and Greater False Vampire (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Grand Leaf-nosed Bat is recorded against all the mammals logged in Cat Tien National Park (24 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.
