Greater Sac-winged Bat
Greater Sac-winged BatGreater Sac-winged BatGreater Sac-winged Bat

Greater Sac-winged Bat

Saccopteryx bilineata

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
10–20% · With luck
overall probability at Yasuní National Park
11 Verified records at Yasuní National Park
October Best month highest sighting rate
☀️ Diurnal When it's active during daytime hours (6am–6pm)

The greater sac-winged bat (Saccopteryx bilineata) is a bat of the family Emballonuridae native to Central and South America. They are common bats seen in the rainforest, as they often roost on the outside of large trees. They are insectivores and use echolocation calls through the mouth to track their prey, which includes flies, beetles, butterflies and moths. The long nose and upper lip are highly mobile and can shift upward to enlarge the mouth opening. The term "sac-winged" refers to small pouches on the wings. These sacs are used by males to attract females and to mark their harem territory. Wikipedia →

10–20% of wildlife watchers report a Greater Sac-winged Bat sighting in Yasuní National Park, based on 11 days of visitor records from GBIF citizen-science data.

Closest Relatives at Yasuní National Park

Lesser Sac-winged Bat
LC

Lesser Sac-winged Bat

☀️🌙 Day & Night Mammal

Saccopteryx leptura

Insufficient data
Proboscis Bat
LC

Proboscis Bat

☀️ Diurnal Mammal

Rhynchonycteris naso

30–40% · Possible
🐒 No photo available
LC

Chestnut Sac-winged Bat

☀️🌙 Day & Night Mammal

Cormura brevirostris

Insufficient data
🐒 No photo available
LC

Lesser Ghost Bat

☀️🌙 Day & Night Mammal

Diclidurus scutatus

Insufficient data
Greater Spear-nosed Bat
LC

Greater Spear-nosed Bat

☀️🌙 Day & Night Mammal

Phyllostomus hastatus

5–10% · With luck
Striped Spearnosed Bat

Striped Spearnosed Bat

🌙 Nocturnal Mammal

Gardnerycteris crenulatum

5–10% · With luck
🐒 No photo available
LC

Fischer's little fruit bat

🌙 Nocturnal Mammal

Rhinophylla fischerae

Insufficient data
chestnut short-tailed bat
LC

chestnut short-tailed bat

🌙 Nocturnal Mammal

Carollia castanea

Insufficient data
Dark Fruit-eating Bat
LC

Dark Fruit-eating Bat

🌙 Nocturnal Mammal

Artibeus obscurus

Insufficient data
Great Fruit-eating Bat
LC

Great Fruit-eating Bat

☀️🌙 Day & Night Mammal

Artibeus lituratus

Insufficient data
Bidentate Yellow-eared Bat
LC

Bidentate Yellow-eared Bat

☀️🌙 Day & Night Mammal

Vampyriscus bidens

Insufficient data
Northern Little Yellow-eared Bat
LC

Northern Little Yellow-eared Bat

🌙 Nocturnal Mammal

Vampyressa thyone

Insufficient data

📅 Monthly Probability

10–20
Jan
<5
Feb
<5
Mar
<5
Apr
5–10
May
5–10
Jun
10–20
Jul
<5
Aug
<5
Sep
30–40
Oct
10–20
Nov
<5
Dec

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Carara National Park 🇨🇷 Costa Rica
10–20%
2 Calakmul Biosphere Reserve 🇲🇽 Mexico
10–20%
3 Celestún Biosphere Reserve 🇲🇽 Mexico
10–20%
4 Piedras Blancas National Park 🇨🇷 Costa Rica
10–20%
5 Yasuní National Park 🇪🇨 Ecuador
10–20%
6 Braulio Carrillo National Park 🇨🇷 Costa Rica
10–20%
7 Soberanía National Park 🇵🇦 Panama
10–20%
8 Cuyabeno Wildlife Reserve 🇪🇨 Ecuador
5–10%
9 Corcovado National Park 🇨🇷 Costa Rica
5–10%
10 Montes Azules Biosphere Reserve 🇲🇽 Mexico
5–10%
11 Arenal Volcano National Park 🇨🇷 Costa Rica
<5%
12 Santa Rosa National Park 🇨🇷 Costa Rica
Insufficient data
13 Main Ridge Forest Reserve 🇹🇹 Trinidad and Tobago
Insufficient data
14 Anavilhanas National Park 🇧🇷 Brazil
Insufficient data
15 Bastimentos Island National Marine Park 🇵🇦 Panama
Insufficient data
16 Amacayacu National Natural Park 🇨🇴 Colombia
Insufficient data
17 Cabo Blanco Absolute Nature Reserve 🇨🇷 Costa Rica
Insufficient data
18 Tortuguero National Park 🇨🇷 Costa Rica
Insufficient data
19 Tayrona National Natural Park 🇨🇴 Colombia
Insufficient data
20 Chagres National Park 🇵🇦 Panama
Insufficient data
21 Ostional Wildlife Refuge 🇨🇷 Costa Rica
Insufficient data
22 Palo Verde National Park 🇨🇷 Costa Rica
Insufficient data
23 Las Baulas Marine National Park 🇨🇷 Costa Rica
Insufficient data
24 Manuel Antonio National Park 🇨🇷 Costa Rica
Insufficient data
25 Tapantí-Macizo de la Muerte National Park 🇨🇷 Costa Rica
Insufficient data
26 La Amistad International Park (Panama) 🇵🇦 Panama
Insufficient data
27 Tambopata National Reserve 🇵🇪 Peru
Insufficient data

Quick answers

What are the chances of seeing a Greater Sac-winged Bat in Yasuní National Park?

About 11% of wildlife watchers report a Greater Sac-winged Bat sighting in Yasuní National Park, based on 11 days of visitor records from GBIF citizen-science data.

When is the best time to see Greater Sac-winged Bat in Yasuní National Park?

October has the highest sighting rate for Greater Sac-winged Bat in Yasuní National Park in our monthly data.

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