A deer hay wind,[1] deer fold or elrick is an artificial,[2] natural or modified natural feature used in the culling, capture or management of deer in relation to deer parks or natural woodland and open countryside. These structures have existed for many centuries and after falling out of use and their function having been forgotten the more substantial earth or stone examples have attracted names such as Roman Trenches, Old Fortifications, etc.[3][4][5] The hinds were the main target of the hunt.[6] Deer dykes were also a substantial landscape feature built to exclude deer from crops on newly cleared land with ditches on the outside and hedges or wooden fences on top of stone banks.[7]