Big-spotted Cleg
EN

Big-spotted Cleg

Haematopota bigoti

Unknown

Photo: iNaturalist: (c) Rui Andrade, all rights reserved

Overview

The Big-spotted Cleg (Haematopota bigoti) is a large horse fly species distinguished by its prominent dark spots across pale wings and robust build. As a blood-feeding insect, females play important ecological roles as both disease vectors and prey for various bird and spider species, while also serving as pollinators when feeding on nectar.

The Big-spotted Cleg (Haematopota bigoti) faces significant population declines primarily due to habitat loss and degradation of its specialized wetland environments. Agricultural intensification, urban development, and climate-induced changes to water regimes have severely reduced the availability of suitable breeding and feeding habitats for this blood-feeding fly species.

Threat summary

Habitat

Big-spotted Clegs inhabit marshy areas, wet meadows, and the edges of slow-moving streams where females lay eggs in moist soil. Adults are commonly found near grazing areas and woodland clearings where they seek blood meals from livestock and wild mammals.

Frequently asked questions

Why is Big-spotted Cleg classified as Endangered?
Big-spotted Cleg is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. The Big-spotted Cleg (Haematopota bigoti) faces significant population declines primarily due to habitat loss and degradation of its specialized wetland environments. Agricultural intensification, urban development, and climate-induced changes to water regimes have severely reduced the availability of suitable breeding and feeding habitats for this blood-feeding fly species.
Where does Big-spotted Cleg live?
Big-spotted Cleg occurs in Denmark, France, Netherlands, Norway, Poland, and Portugal (plus 4 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Big-spotted Cleg?
The main threats to Big-spotted Cleg are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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