Researchers found that 15 of 17 species which commonly live on farmland – including the small tortoiseshell, small skipper and wall butterfly – show declines associated with increasing neonic use. […] Neonics were first introduced in 1994 and usage increased at its fastest rate during the first decade of the 21ˢᵗ century, […] In 2013, the EU introduced a temporary ban on certain types of neonics for flowering crops such as oilseed rape to allow scientists to better determine the insecticides’ impact on bees. 2015 November 24, Patrick Barkham, “Pesticide may be reason butterfly numbers are falling in UK, says study”, in The Guardian, archived from the original on 05 Mar 2016: