Swollen-spurred Bladderwort
CRCritically Endangered

Swollen-spurred Bladderwort

Utricularia gibba

**Swollen-spurred Bladderwort (Utricularia gibba)** The Swollen-spurred Bladderwort is a small carnivorous aquatic plant characterized by thread-like stems bearing tiny bladder traps and distinctive yellow flowers with inflated spurs. These microscopic bladders create suction to capture small aquatic organisms including water fleas, mosquito larvae, and protozoans.

114

Countries

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Utricularia_gibba

01Classification

Taxonomy & Classification

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Lamiales

Family

Lentibulariaceae

Genus

Utricularia

Swollen-spurred Bladderwort belongs to the family Lentibulariaceae, order Lamiales, within the Magnoliopsida class.

02Description

Species Profile

**Swollen-spurred Bladderwort (Utricularia gibba)** The Swollen-spurred Bladderwort is a small carnivorous aquatic plant characterized by thread-like stems bearing tiny bladder traps and distinctive yellow flowers with inflated spurs. These microscopic bladders create suction to capture small aquatic organisms including water fleas, mosquito larvae, and protozoans. The plant plays a dual ecological role as both predator of microorganisms and primary producer, contributing to nutrient cycling in aquatic ecosystems. This species demonstrates remarkable global distribution, occurring across six continents in freshwater and occasionally terrestrial habitats. It inhabits shallow ponds, marshes, rice paddies, temporary pools, and slow-moving waterways from tropical to temperate regions, showing exceptional adaptability to diverse environmental conditions. Despite its widespread distribution, U. gibba is classified as Critically Endangered, though specific threats remain unassessed. The extensive geographic range suggests potential confusion with closely related species or significant population declines across its native range. Habitat destruction through wetland drainage, agricultural intensification, and urban development likely represents primary threats. Water pollution and altered hydrology from dam construction may further impact populations. Current conservation measures for this species are not well-documented, reflecting limited research attention despite its critical status. The contradiction between its apparently cosmopolitan distribution and endangered classification indicates urgent need for taxonomic clarification and population assessments. The outlook remains uncertain due to insufficient population data and threat assessment. Comprehensive surveys are needed to determine whether this represents a genuinely widespread but declining species or a complex of closely related taxa requiring separate conservation strategies.

Swollen-spurred Bladderwort faces severe decline primarily due to habitat destruction and degradation of its specialized aquatic environments. Wetland drainage, water pollution, and invasive species competition have significantly reduced suitable habitat availability across its range.

Key Facts

IUCN StatusCritically Endangered (CR)
GroupPlants
03Habitat

Habitat & Distribution

FRESHWATERMajorFRESHWATERMajorFRESHWATERMajorTERRESTRIALMajor
04Threats

Threats

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IUCN Red List: Critically Endangered

Swollen-spurred Bladderwort faces severe decline primarily due to habitat destruction and degradation of its specialized aquatic environments. Wetland drainage, water pollution, and invasive species competition have significantly reduced suitable habitat availability across its range.

Agricultural runoff and chemical contamination

HighOngoing

Water pollution and eutrophication

HighOngoing

Wetland drainage and habitat destruction

HighOngoing

Climate change affecting water levels

MediumOngoing

Invasive aquatic plant competition

MediumOngoing
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
EUNTNear ThreatenedCRCritically EndangeredLower local risk
EUNTNear ThreatenedCRCritically EndangeredLower local risk

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). Swollen-spurred Bladderwort (Utricularia gibba). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/swollen-spurred-bladderwort

Full citation guide & data usage terms