CR

Izecksohn's Treefrog

Bokermannohyla izecksohni

Declining

Overview

Bokermannohyla izecksohni, also known as Izecksohn's treefrog, is a species of frog in the family Hylidae. It is endemic to São Paulo state, Brazil. It was already considered possibly extinct in 2004, but three living frogs were discovered in 2005–2006. It is a medium-sized treefrog, measuring about 45 mm (1.8 in) in snout–vent length.

Bokermannohyla izecksohni faces severe threats from habitat destruction due to urban expansion and agricultural conversion in its restricted Atlantic Forest range. The species' dependence on pristine forest streams makes it particularly vulnerable to water pollution from agricultural runoff and urban development. Climate change poses an additional threat by altering precipitation patterns and stream flow regimes essential for its reproductive cycle.

Threat summary

Habitat

This critically endangered treefrog inhabits pristine Atlantic Forest streams and adjacent riparian vegetation in southeastern Brazil. The species requires clean, fast-flowing water for breeding and dense forest canopy for shelter and foraging.

Forest· majorWetlands (inland) - Permanent freshwater lakes· major

Conservation measures underway

Species recovery

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 Brazil

Striped SmoothhoundCR

Striped Smoothhound

Mustelus fasciatus

Declining
VU

Mussismilia hispida

Declining
VU

Myrcia carioca

Declining
Brasilia TapaculoEN

Brasilia Tapaculo

Scytalopus novacapitalis

Declining

Frequently asked questions

Why is Izecksohn's Treefrog classified as Critically Endangered?
Izecksohn's 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. Bokermannohyla izecksohni faces severe threats from habitat destruction due to urban expansion and agricultural conversion in its restricted Atlantic Forest range. The species' dependence on pristine forest streams makes it particularly vulnerable to water pollution from agricultural runoff and urban development. Climate change poses an additional threat by altering precipitation patterns and stream flow regimes essential for its reproductive cycle.
Where does Izecksohn's Treefrog live?
Izecksohn's Treefrog occurs in Brazil. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Izecksohn's Treefrog?
The main threats to Izecksohn's Treefrog are 1.1, 2.1, ai-1, and ai-2. The full IUCN-classified threat record for this species is detailed on the species page.

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