Brown Egg Frog
Ctenophryne geayi
Ctenophryne geayi is a species of frog in the family Microhylidae. It is widely distributed in the northern parts of South America, in the Guianas and in the Amazon Basin in Venezuela, Colombia, Ecuador, Peru, Bolivia, and Brazil.
9
Countries
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Ctenophryne_geayi
Taxonomy & Classification
Kingdom
Animalia
Phylum
Chordata
Class
Amphibia
Order
Anura
Family
Microhylidae
Genus
Ctenophryne
Brown Egg Frog belongs to the family Microhylidae, order Anura, within the Amphibia class.
Species Profile
Ctenophryne geayi is a species of frog in the family Microhylidae. It is widely distributed in the northern parts of South America, in the Guianas and in the Amazon Basin in Venezuela, Colombia, Ecuador, Peru, Bolivia, and Brazil. It might actually represent two species.
The Brown Egg Frog faces severe population declines primarily due to extensive deforestation and habitat fragmentation across its limited range in the Guiana Shield region. Mining activities, agricultural expansion, and infrastructure development have significantly reduced and degraded the pristine forest habitats this species requires for survival.
Key Facts
Habitat & Distribution
Ctenophryne geayi occurs near flooded depressions and semi-permanent or seasonal ponds of old growth tropical rainforests at elevations up to above sea level. It is a secretive species that is nocturnal and fossorial, found above ground only during brief explosive periods of reproduction in pools. It can locally suffer from habitat loss but is not overall threatened; it occurs in many protected...
Threats
IUCN Red List: Endangered
The Brown Egg Frog faces severe population declines primarily due to extensive deforestation and habitat fragmentation across its limited range in the Guiana Shield region. Mining activities, agricultural expansion, and infrastructure development have significantly reduced and degraded the pristine forest habitats this species requires for survival.
Deforestation and habitat loss
Mining activities
Agricultural expansion
Habitat fragmentation
Infrastructure development
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
This page: SpeciesRadar (2025). Brown Egg Frog (Ctenophryne geayi). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/brown-egg-frog