Half-moon hairstreak (Satyrium semiluna) COSEWIC assessment and status report: chapter 1

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Assessment summary

Assessment Summary – April 2006

Common name:
Half-moon Hairstreak

Scientific name:
Satyrium Semiluna

Status:
Endangered

Reason for designation:
The butterfly occurs as disjunct populations in two small, restricted areas at the northern extreme of the species' range. The species' population has likely declined in the past as a result of habitat loss. Both populations continue to be threatened by habitat loss and degradation. In British Columbia the species occurs in an area under severe pressure for development. In both Alberta and British Columbia, invasive weeds also pose a serious threat.

Occurrence:
British Columbia, Alberta

Status history:
Designated Endangered in April 2006. Assessment based on a new status report.

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