Your claim, that cars doesn’t become part of the ecosystem, got me thinking of this clip: http://www.bbc.com/earth/storyoflife/player?clipID=20160713-crows-use

Your claim, that cars doesn’t become part of the ecosystem, got me thinking of this clip: http://www.bbc.com/earth/storyoflife/player?clipID=20160713-crows-use-cars-to-crack-nuts http://www.bbc.com/earth/storyoflife/player?clipID=20160713-...