CRCritically Endangered

Isophya harzi

Isophya harzi is a critically endangered species of bush-cricket endemic to a small region in the Eastern Alps. This orthopteran insect belongs to the family Tettigoniidae and represents one of the most geographically restricted members of its genus.

Decreasing

Population trend

1

Countries

01Classification

Taxonomy & Classification

Kingdom

ANIMALIA

Phylum

ARTHROPODA

Class

INSECTA

Order

ORTHOPTERA

Family

TETTIGONIIDAE

Genus

Isophya

Isophya harzi belongs to the family TETTIGONIIDAE, order ORTHOPTERA, within the INSECTA class.

02Description

Species Profile

Isophya harzi is a critically endangered species of bush-cricket endemic to a small region in the Eastern Alps. This orthopteran insect belongs to the family Tettigoniidae and represents one of the most geographically restricted members of its genus. The species was first described relatively recently and is known from extremely limited localities, primarily in alpine and subalpine grassland habitats at specific elevations. Like other Isophya species, I. harzi is characterized by its distinctive morphological features and acoustic properties, with males producing species-specific calling songs used for mate attraction. The species occupies specialized ecological niches within mountain grassland ecosystems, where it plays a role in local food webs both as herbivore and prey species. Its critical conservation status reflects the severe constraints on its distribution and the ongoing pressures facing its habitat. The primary threats to I. harzi include habitat degradation and loss due to changes in traditional land management practices, climate change effects on alpine ecosystems, and the species' extremely limited range which makes it vulnerable to local extinctions. Conservation efforts for this species face challenges due to its restricted distribution and specialized habitat requirements. Research into its ecology, population dynamics, and specific habitat needs remains essential for developing effective conservation strategies. The species serves as an indicator of the health of alpine grassland ecosystems and highlights the conservation challenges facing endemic invertebrates in mountain regions.

Isophya harzi faces severe threats from habitat loss and degradation caused by changes in traditional alpine land management practices and agricultural intensification. Climate change poses additional risks by altering the temperature and precipitation patterns of its specialized mountain grassland habitat. The species' extremely restricted geographic range makes it particularly vulnerable to local extinction events.

Key Facts

IUCN StatusCritically Endangered (CR)
TrendDecreasing
GroupInsects
03Habitat

Habitat & Distribution

Isophya harzi inhabits alpine and subalpine grasslands in the Eastern Alps at specific elevational ranges. The species requires specialized mountain grassland ecosystems with particular vegetation characteristics and microclimate conditions.

ForestMajor
04Threats

Threats

!

IUCN Red List: Critically Endangered

Isophya harzi faces severe threats from habitat loss and degradation caused by changes in traditional alpine land management practices and agricultural intensification. Climate change poses additional risks by altering the temperature and precipitation patterns of its specialized mountain grassland habitat. The species' extremely restricted geographic range makes it particularly vulnerable to local extinction events.

Livestock farming & ranching

Ongoing
05Conservation

Conservation Actions

Site/area protection
Site/area management
Species recovery
06Range

Found in 1 Country

07National Status

National vs Global Threat Status

How this species is assessed at the national level compared to its IUCN global status (CR).

CountryNational StatusGlobal StatusComparison
EUCRCritically EndangeredCRCritically EndangeredSame
EUCRCritically EndangeredCRCritically EndangeredSame

National Red List data sourced from the National Red List Project (nationalredlist.org, ZSL) and country-specific Red List authorities.

Community

Community Sightings

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07Sources

Sources & Attribution

How to Cite

IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS

GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org

National Red Lists: ZSL (2025). National Red List. Zoological Society of London. Available at: https://www.nationalredlist.org

This page: SpeciesRadar (2025). Isophya harzi (Isophya harzi). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/cozia-plump-bush-cricket

Full citation guide & data usage terms