CR

Sarcohyla calvicollina

Local name: Cerro Pelón Treefrog

Declining

Overview

Sarcohyla calvicollina is a species of frog in the family Hylidae. It is endemic to Mexico. Scientists have only seen it in two pages: 2519 and 2712 meters above sea level on Cerro Pelón in Oaxaca.

Sarcohyla calvicollina faces severe population decline primarily due to habitat destruction from agricultural expansion and urban development in its limited montane range. The species' restricted distribution makes it particularly vulnerable to localized threats, while climate change poses additional risks by altering the temperature and moisture conditions essential for its survival. Chytrid fungal infections, which have devastated amphibian populations throughout Central America, represent an ongoing biological threat to remaining populations.

Threat summary

Habitat

This species inhabits cloud forests and pine-oak forests in montane regions of Mexico, typically at elevations between 1,800-2,400 meters. It requires humid microhabitats with permanent or semi-permanent water sources for breeding, often associated with rocky streams and seepages in forested areas.

Forest· majorForest - Subtropical/tropical moist montane· majorWetlands (inland) - Permanent rivers/streams· majorRocky areas· major

Conservation measures underway

Site/area protectionHabitat & natural process restorationSpecies recoveryEx-situ conservation

Other threatened species in HYLIDAE

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Maracas Heart-tongued Frog

Phyllodytes tuberculosus

Declining
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Papallacta Treefrog

Hyloscirtus psarolaimus

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VU

Scinax rupestris

Unknown
CR

Nyctimantis pomba

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Threatened in Mexico

EN

Turbinicarpus horripilus

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CR

Turbinicarpus mandragora

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EN

Opuntia pachyrrhiza

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EN

Arachnothryx tacanensis

Declining

Frequently asked questions

Why is Cerro Pelón Treefrog classified as Critically Endangered?
Cerro Pelón 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 calvicollina faces severe population decline primarily due to habitat destruction from agricultural expansion and urban development in its limited montane range. The species' restricted distribution makes it particularly vulnerable to localized threats, while climate change poses additional risks by altering the temperature and moisture conditions essential for its survival. Chytrid fungal infections, which have devastated amphibian populations throughout Central America, represent an ongoing biological threat to remaining populations.
Where does Cerro Pelón Treefrog live?
Cerro Pelón 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 Cerro Pelón Treefrog?
The main threats to Cerro Pelón Treefrog are 2.1, 5.3, 8.1, and ai-1. The full IUCN-classified threat record for this species is detailed on the species page.

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