Not so typical bittern habitat

On Monday morning Lisa from Rolleston sighted a bittern on this road edge near Lincoln. The bird froze when sighted. The rank broom on the edge of the road perhaps was a substitute for reeds. I went out the following morning but had no luck in finding the bird. Unusual habitat for a bittern , but only 15 kilometres away from the bird's strong hold in Canterbury, on the western side of Lake Ellesmere. So keep an eye out as bitterns turn up in some unusual locations in the Autumn.
Regards
Peter