Beaver has been re-introduced into Poland and thrives. We had good views of a family on our first morning. It's impact on riparian habitats is massive. Here a stream has been reduced to a trickle choked with Elodea by the presence of a dam upstream.
A deadwood area in the pond just upstream of a dam. These beavers had made use of raised road embankment and had impounded an unnatural amount of water as a result. The subsequent tree die-off is a boon to woodpeckers.