Canterbury Police are appealing for information following the sudden death of a man in Heathcote Valley.

Emergency services were called to Horotane Valley Road on Friday.

Police said the death was not believed to be suspicious but they were working to identify the deceased.

The man is thought to be in his 30s or 40s and has a distinctive birthmark on his left forearm.

When located, he was wearing a black long sleeve woollen jersey, black trousers, and brown and grey tramping boots. Police also found a backpack with him.

Anyone with information that may assist is asked to call Police on 105 and quote file number 250919/7193. Information can also be provided anonymously through Crime Stoppers on 0800 555 111 or at www.crimestoppers-nz.org.