Species at Risk Brochure
Backhouse, F. 2000. Extinct and Extirpated Species. B.C. Minist. Environ., Lands and Parks, Wildl. Branch. 6pp.
Baron, N., and F. Backhouse. 1999. Rare Butterflies of Southeastern Vancouver Island and the Gulf Islands. B.C. Minist. Environ., Lands and Parks, Wildl. Branch. 6pp.