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Villosa villosa (B.H. Wright, 1898)
Downy Rainbow

Downy Rainbow collected from Lake Worth (male; 57 mm). Photo by staff (Georgia DNR – Wildlife Resources). Specimen courtesy of Georgia Museum of Natural History (GMNH664).
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Federal Protection: No US federal protection

State Protection: No Georgia state protection

Global Rank: G3

State Rank: S3

Element Locations Tracked in Biotics: Yes

SWAP 2015 Species of Greatest Conservation Need (SGCN): No

SWAP 2025 Species of Greatest Conservation Need (SGCN): Yes

2025 SGCN Priority Tier: Moderate Conservation Concern

Element Occurrences (EOs) in Georgia: 46

Habitat Summary for element in Georgia: Large rivers to medium sized streams, oxbows, or reservoirs

SWAP 2025 Threat Matrix

Threat 1 Threat 2 Threat 3
General Threat Pollution Natural system modifications Agriculture & aquaculture
Specific Threat Agricultural & forestry effluents Dams & water management/use Annual & perennial non-timber crops

SWAP 2025 Conservation Actions:

  • Action 1: Assess SGCN mussels and mussel communities in the ACF River system
  • Action 2: Protect aquatic SGCN from low stream flows in southwest Georgia
  • Action 3: Restore passage of SGCN mussel host fishes in ACF Basin
  • Action 4: Assess SGCN mussels and mussel communities in the Ochlockonee River system
  • Action 5: Assess SGCN mussels and mussel communities in the Suwannee River system
Downy Rainbow collected from Lake Worth (female; 38 mm). Photo by staff (Georgia DNR – Wildlife Resources). Specimen courtesy of Georgia Museum of Natural History (GMNH664).
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