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  3. Fleischmann's Glass Frog

One of the 47 frogs on WAnimals

Amphibians · Anura · Centrolenidae

Fleischmann's Glass Frog

Hyalinobatrachium fleischmanni

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

Fleischmann's glass frog has a completely transparent belly: through the skin you can see the beating heart, the liver and the intestines. It lives on leaves overhanging streams and the male guards the eggs for weeks. In 2022 it was discovered how it manages to become almost invisible while it sleeps.

Size

2 cm – 3 cm

Life expectancy

5 years

Diet

Insectivore

Feeds mainly on insects and other invertebrates.

Activity

Nocturnal

Active mainly at night.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Sighting difficulty

Easy

RainforestFreshwater
11countries45parks

Fun facts

  • It turns transparent to sleep: a 2022 study revealed that while asleep it concentrates almost all its red blood cells in the liver, taking them out of circulation, which makes it two to three times more transparent. On waking it releases them again.
  • That mechanism ought to give it fatal clots and does not: how it stores so much concentrated blood without clotting is a puzzle being investigated for its possible medical applications.
  • The male guards the eggs, stuck to the underside of a leaf over the stream, for weeks, keeping them moist and defending them from parasitic wasps, and on hatching the tadpoles drop straight into the water.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (amphibian)
Habitat and environment
Vegetation over streams in rainforest of Central America and northern South America
Sexual maturity
12 months
Gestation / incubation
15 days of egg development on leaves
Litter / clutch size
30 eggs

Sources consulted: https://es.wikipedia.org/wiki/Hyalinobatrachium_fleischmanni

Where to find it

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Where to see it

Parks and dive sites where this species has been documented — showing 10 of 45.

Related species

Other species in the catalogue with the most in common with Fleischmann's Glass Frog — same habitat, park, country, tags or family.

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Based on what we already know about fleischmann's glass frog.

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See full glossary
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The pins mark the parks where its presence is documented.

See its range on the interactive map→
CorcovadoCosta Rica
TortugueroCosta Rica
Manuel AntonioCosta Rica
MonteverdeCosta Rica
Arenal VolcanoCosta Rica
Volcán BarúPanama
CoibaPanama
DarienPanama
TikalGuatemala
Maya Biosphere ReserveGuatemala
See all 45 parks
Least Concern

Water Opossum

Chironectes minimus

Southern TamanduaLeast Concern

Southern Tamandua

Tamandua tetradactyla

Least Concern

Common Silky Anteater

Cyclopes didactylus

Morelet's CrocodileLeast Concern

Morelet's Crocodile

Crocodylus moreletii

Cane ToadLeast Concern

Cane Toad

Rhinella marina

Red-eyed TreefrogLeast Concern

Red-eyed Treefrog

Agalychnis callidryas

CountriesCosta Rica
ParksCorcovadoCosta Rica
TagsInsectivore
Insectivore
Nocturnal
Solitary
Amphibian
Rainforest
Freshwater

North America8

South America3

Costa Rica
Panama
Guatemala
Honduras
Colombia
Nicaragua
Belize
Costa Rica
El Salvador
Guatemala
Honduras
Mexico
Nicaragua
Panama
Colombia
Ecuador
Venezuela