CR

Rio Treefrog

Boana claresignata

Unknown

Overview

Boana claresignata is a species of frog in the family Hylidae. It is endemic to Serra do Mar, Brazil.

Boana claresignata faces severe population decline primarily due to habitat destruction from agricultural expansion and urban development in its restricted range. The species is particularly vulnerable to water pollution and sedimentation affecting its breeding pools, while climate change threatens to alter precipitation patterns critical for reproduction. Chytrid fungal disease poses an additional emerging threat to remaining populations.

Threat summary

Habitat

This species inhabits Atlantic Forest remnants in southeastern Brazil, specifically requiring pristine forest streams and temporary pools for breeding. It depends on dense canopy cover and clean water sources within primary and well-preserved secondary forest environments.

Forest· majorWetlands (inland) - Permanent rivers/streams· major

Conservation measures underway

Species managementSpecies recoveryEx-situ conservation

Other threatened species in HYLIDAE

VU

Maracas Heart-tongued Frog

Phyllodytes tuberculosus

Declining
VU

Papallacta Treefrog

Hyloscirtus psarolaimus

Declining
VU

Scinax rupestris

Unknown
CR

Nyctimantis pomba

Declining

Threatened in Argentina

Striped SmoothhoundCR

Striped Smoothhound

Mustelus fasciatus

Declining
VU

Achala Escuerzo-Frog

Odontophrynus achalensis

Declining
VU

Copper Shark

Carcharhinus brachyurus

Declining
EN

Gubernatrix cristata

Declining

Frequently asked questions

Why is Rio Treefrog classified as Critically Endangered?
Rio 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. Boana claresignata faces severe population decline primarily due to habitat destruction from agricultural expansion and urban development in its restricted range. The species is particularly vulnerable to water pollution and sedimentation affecting its breeding pools, while climate change threatens to alter precipitation patterns critical for reproduction. Chytrid fungal disease poses an additional emerging threat to remaining populations.
Where does Rio Treefrog live?
Rio Treefrog occurs in Argentina. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Rio Treefrog?
The main threats to Rio Treefrog are 5.3, 8.1, ai-1, and ai-2. The full IUCN-classified threat record for this species is detailed on the species page.

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