Photo: Daniel Ballmer / CC BY-SA 4.0
Colletes similis
Bare-saddled Colletes
A medium-small plasterer bee (8-11 mm) resembling Colletes daviesanus but slightly larger with denser thoracic hairs and broader white abdominal bands. The first tergite has a distinctive angular lateral hair band that is interrupted in the middle. It is oligolectic on Asteraceae, especially tansy (Tanacetum vulgare) and yarrow (Achillea millefolium). It nests in self-dug burrows in steep earth banks and sparsely vegetated flat ground. Swiss Red List: Least Concern (LC).
Species Facts
- Size
- 8-11 mm
- Flight Period
- June to September
- Nesting
- Ground
- Specialization
- Asteraceae
- Abundance
- Uncommon
- Family
- Colletidae
External Sources
This data has been cross-referenced with national sources:
Data Source & Copyright
| Category | Source / Author | License |
|---|---|---|
| Photo | Daniel Ballmer | CC BY-SA 4.0 |
| Taxonomy & Distribution | InfoFauna Switzerland | Public data |
| Global Distribution | GBIF | CC BY 4.0 |
Data Quality
High Quality Last audit: 2026-05-22 Red List: LC
Completeness: 100%
✓Photo exists✓Traits consistent✓Description quality✓Red List referenced✓Attribution verified
Confidence: 67%
IdentifiabilityMediumImage confidenceMediumImage qualityHighTrait coherenceHigh
