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Message: <blockquote data-quote="Ficedula" data-source="post: 1709431" data-attributes="member: 81108">OK Steve i defer to your greater knowledge....butAbsence of evidence is not evidence of absence!Perhaps i should have said "and the possibility natural vagrancy cannot be entirely eliminated" even though this sounds like a superfluous truism.It is precisely the existence of this sort of evidence that convinces me that appeals to naturalness is a lost cause.I wonder Steve if you would like to comment on any "evidence of substantial harm by EO's". I believe EO's have relatively recently colonised The Netherlands, what species have been eliminated or substantially declined as a consequence? This is what would convince me that action needs to be taken.</blockquote>