In the UK and Ireland, several distinct feral populations now exist. Some of these are in isolated areas, for example on the island of Lundy, but others are contiguous with populations of the native red deer. Since the two species sometimes hybridise, there is a serious conservation concern.he sika deer is a member of the genus Cervus, a group of deer also known as the true deer. Formerly, sika were grouped together in this genus with nine other species.
The flexor retinaculum is a strong, fibrous band that covers the carpal bones on the palmar side of the hand near the wrist. It attaches to the bones near the radius and ulna. On the ulnar side, the flexor retinaculum attaches to the pisiform bone and the hook of the hamate bone.
This is especially obvious at the hook of the hamate, where part of the flexor retinaculum (the cartilage sheath that covers the carpal tunnel on the palm side of the hand) attaches. The injury presents as pain on that part of the hand, localized to the area of the bone.