Occurrence records of native Irish hares and non-native European hares from night-driven Distance sampling, camera trap surveys, and road casualties. Geographic Coverage: A 1,652 km2 area of the mid-Ulster region of Northern Ireland (centroid coordinates 54° 45'21.1 ? N, 6° 39'29.6 ? W). Temporal Coverage: Winter 2012 - summer 2015 Species Groups recorded: terrestrial mammal Dataset Status: Complete. Camera trap data have been published on figshare (https://figshare.com/s/89016efaffc611e48b0806ec4bbcf141), as required by the standards of the journal Remote Sensing in Ecology and Conservation. Additional Information: Questions may be directed to Anthony Caravaggi or Dr. Neil Reid. Full details of Distance sampling and camera trap methods can be found in: Caravaggi et al. (2015) Biological Invasions. DOI: 10.1007/s10530-014-0759-1. Caravaggi et al. (2016) Remote Sensing in Ecology and Conservation. DOI: 10.1002/rse2.11