Butterfly numbers drop a mystery, say experts Oct 11, 2016 6:11:15 GMT Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Pincho Paxton on Oct 11, 2016 6:11:15 GMT Link...Butterfly numbers drop a mystery, say expertsPincho says...The first thought is pesticides, because bees are the example.Pincho Paxton