Resources
Yorkshire publications
Butterflies and Moths of Yorkshire: Distribution and Conservation. 1989. Sutton, S.L., & Beaumont, H.E..
Butterflies and Moths of Yorkshire: A Millennium Review. 2002. Ed. by Beaumont, H.E..
Porritt's Lists. 2011. Frost, H.M., H.E. Beaumont, H.E., Crawford, T.J., Fryer, G. & Yeates, C.S.W..
Yorkshire Reports
Argus. A Newsletter and annual Report published jointly by YNU and BCY.

Yorkshire websites
Yorkshire Naturalists' Union

Butterfly Conservation, Yorkshire Branch

Yorkshire Moths Forum

Other useful websites
For links to other sites, see here.