Aquatic Treefrog
CR

Aquatic Treefrog

Sarcohyla crassa

Declining

Photo: Photo: Esteban Villa Restrepo via Wikimedia Commons CC BY-SA 4.0

Overview

Sarcohyla crassa is a species of frog in the family Hylidae. It is endemic to the Sierra Madre de Oaxaca of Oaxaca, Mexico. It is also known as the aquatic treefrog, or when referring to the former Hyla bogertae, Bogert's aquatic treefrog.

Sarcohyla crassa faces severe population decline primarily due to the devastating chytrid fungus (Batrachochytrium dendrobatidis), which has caused catastrophic mortality in amphibian populations throughout its Mexican cloud forest range. Habitat destruction from agricultural expansion and logging activities has further fragmented the remaining suitable montane forest areas. Climate change poses an additional threat by altering the cool, humid microclimate conditions essential for this species' survival in high-elevation environments.

Threat summary

Habitat

This species inhabits cool, humid cloud forests and pine-oak forests at elevations between 1,800-3,000 meters in the mountains of central Mexico. It requires pristine montane environments with consistent moisture levels and dense canopy cover typical of these high-elevation forest ecosystems.

Forest· majorForest - Subtropical/tropical moist montane· major

Conservation measures underway

Site/area protectionSpecies recovery

Frequently asked questions

Why is Aquatic Treefrog classified as Critically Endangered?
Aquatic Treefrog is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Sarcohyla crassa faces severe population decline primarily due to the devastating chytrid fungus (Batrachochytrium dendrobatidis), which has caused catastrophic mortality in amphibian populations throughout its Mexican cloud forest range. Habitat destruction from agricultural expansion and logging activities has further fragmented the remaining suitable montane forest areas. Climate change poses an additional threat by altering the cool, humid microclimate conditions essential for this species' survival in high-elevation environments.
Where does Aquatic Treefrog live?
Aquatic Treefrog occurs in Mexico. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Aquatic Treefrog?
The main threats to Aquatic Treefrog are 1.1, 2.1, 5.3, and 8.1. The full IUCN-classified threat record for this species is detailed on the species page.

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