Bug-on-a-stick
Buxbaumia aphylla
Bug-on-a-stick is a distinctive moss species characterized by its unusual asymmetrical capsules that sit atop thin, reddish-brown stalks, resembling tiny insects perched on sticks. This small but remarkable bryophyte plays an important ecological role in forest ecosystems by contributing to nutrient cycling and providing microhabitat for invertebrates.
Photo: iNaturalist: (c) Brian Starzomski, some rights reserved (CC BY-NC), uploaded by Brian Starzomski
Taxonomy & Classification
Kingdom
Plantae
Phylum
Bryophyta
Class
Bryopsida
Order
Buxbaumiales
Family
Buxbaumiaceae
Genus
Buxbaumia
Bug-on-a-stick belongs to the family Buxbaumiaceae, order Buxbaumiales, within the Bryopsida class.
Species Profile
Bug-on-a-stick is a distinctive moss species characterized by its unusual asymmetrical capsules that sit atop thin, reddish-brown stalks, resembling tiny insects perched on sticks. This small but remarkable bryophyte plays an important ecological role in forest ecosystems by contributing to nutrient cycling and providing microhabitat for invertebrates. The species has a unique appearance with its flattened, oblique spore capsules that lack the symmetrical form typical of most mosses.
Bug-on-a-stick faces significant threats from habitat loss due to deforestation and forest fragmentation, which reduces the availability of suitable decaying wood substrates essential for its survival. Climate change and air pollution further compromise this moss species by altering forest conditions and reducing air quality in its specialized microhabitats.
Key Facts
Habitat & Distribution
Inhabits mature coniferous and mixed forests, particularly growing on decaying logs, stumps, and rotting wood in shaded, humid forest floor environments. Requires specific microhabitat conditions with high moisture levels and partial decomposition of woody substrates.
Threats
Habitat loss and forest fragmentation
Loss of suitable decaying wood substrates
Air pollution and acid rain
Climate change impacts on forest ecosystems
Forest management practices removing dead wood
National vs Global Threat Status
How this species is assessed at the national level compared to its IUCN global status (VU).
| Country | National Status | Global Status | Comparison |
|---|---|---|---|
| EU | LCLeast Concern | VUVulnerable | Lower local risk |
| EU | LCLeast Concern | VUVulnerable | Lower local risk |
National Red List data sourced from the National Red List Project (nationalredlist.org, ZSL) and country-specific Red List authorities.
Community Sightings
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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). Bug-on-a-stick (Buxbaumia aphylla). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/bug-on-a-stick