CRCritically Endangered

Medium Tree-finch

Geospiza pauper

Declining

Photo: Photo: Wikimedia Commons, CC BY-SA

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

The Medium Tree Finch faces severe threats primarily from invasive parasites, habitat degradation, and extremely limited range. The species is critically endangered due to the devastating impact of the introduced parasitic fly Philornis downsi, which kills nestlings, combined with habitat loss from invasive plant species and human activities on its restricted range in the Galápagos Islands.
Threat summary

Habitat

Forest· majorForest - Subtropical/tropical dry· majorShrubland· major

Conservation measures underway

Site/area protectionSpecies recovery

Other threatened species in THRAUPIDAE

Gubernatrix cristata

Declining

Seven-colored Tanager

Tangara fastuosa

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Cherry-throated Tanager

Nemosia rourei

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Large Tree-finch

Geospiza psittacula

Declining

Threatened in Ecuador

Puya fastuosa

Unknown

Diospyros esmereg

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Copper Shark

Carcharhinus brachyurus

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Baird's Tapir

Tapirus bairdii

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Frequently asked questions

Why is Medium Tree-finch classified as Critically Endangered?

Medium Tree-finch 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. The Medium Tree Finch faces severe threats primarily from invasive parasites, habitat degradation, and extremely limited range. The species is critically endangered due to the devastating impact of the introduced parasitic fly Philornis downsi, which kills nestlings, combined with habitat loss from invasive plant species and human activities on its restricted range in the Galápagos Islands.

Where does Medium Tree-finch live?

Medium Tree-finch occurs in Ecuador. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.

What are the main threats to Medium Tree-finch?

The main threats to Medium Tree-finch are 11.1, 2.1, 2.3, and 5.3. The full IUCN-classified threat record for this species is detailed on the species page.

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