This fence at Greenfield Park in West Allis is made entirely of common and glossy buckthorn and non-native honeysuckle. The fencing is being used to close off some hiking trails and to keep invasives on site to prevent seed from spreading. The fencing also works as a visual cue to lead people to the main trailhead that parks staff want them to use. The Milwaukee County Department of Parks, Recreation and Culture has used this method elsewhere in the county and has gotten overwhelmingly favorable responses from the public.