Large heath | Photo: Ryan Hodnett, License: CC BY-SA 4.0 22. September 201919. September 2019 conservation, media-echo « back On the march: Rare caterpillars destined for the wild Published on chesterzoo.org the 15.08.2019. In cooperation with the Lancashire Wildlife Trust, Chester Zoo is raising caterpillars destined for release, in order to help save certain species. » more Share this post