How Many Reindeer? UAV Surveys as an Alternative to Helicopter or Ground Surveys for Estimating Population Abundance in Open Landscapes. - Ingrid Marie Garfelt Paulsen; Åshild Ønvik Pedersen; Richard Hann; Marie-Anne Blanchet; Isabell Eischeid; Charlotte van Hazendonk; Virve Tuulia Ravolainen; Audun Stien; Mathilde Le Moullec (Remote. Sens., 2023)