In recent years they are believed to be declining both in range and numbers. Monitoring survey in progress. The Yellow-necked mouse differs from the wood mouse by being larger and posessing a continuous yellow band, passing across the chest and lining the forelegs. When held in the hand the yellow-necked mouse is more vigourous and is more inclined to bite. They will enter houses more frequently than wood mice.
More research is needed to obtain better ecological information about the species.
Their main threat is loss of ancient woodland, habitat loss and fragmentation causing isolation of populations.