Half-moon hairstreak (Satyrium semiluna) COSEWIC assessment and status report: chapter 12
Existing protection or other status designations
The Alberta population of S semiluna is protected under the National Parks Act, but is subject to activities within the Park and habitat changes from knapweed invasion. Most known British Columbia populations of the butterfly are not protected under any federal or provincial statute and are mostly on private land. However, several new protected areas in the Okanagan Valley are located within the range of the Half-moon Hairstreak (D. Fraser, pers. comm.) and provide protection for the butterfly’s habitat.
The Nature Conservancy has assigned S. fuliginosa a global status rank of G4 and a Canadian national status rank of N1N2 (NatureServe, 2005). Because most of the locations are actually records for S. semiluna, the ranks are probably valid for this species. The species is ranked SH in Alberta (this rank is outdated; based on 2003 information, S1 is more appropriate), S1 in British Columbia, S4 in Washington and Montana, and SNR in Idaho.