References:
Fukuda, H. (2012). Northward range expansion in 1950-2010 in the Nansei Islands, southwestern Japan, reviewed for six butterfly species(1). Yadoriga 2012.232: 16-33. DOI: https://doi.org/10.18984/yadoriga.2012.232_16
Churi, P. and Kawthankar, N. 2024. Washingtonia filifera (Linden ex André) H.Wendl. – California Fan Palm. In Kunte, K., S. Sondhi, and P. Roy (Chief Editors). Butterflies of India, v. 4.12. Published by the Indian Foundation for Butterflies. URL: https://www.ifoundbutterflies.org/washingtonia-filifera, accessed 2024/12/13.