https://www.bto.org/our-work/science/publications/reports/research-reports/00472-short-eared-owl-survey-and-monitoring-methods
Developing methods for the field survey and monitoring of breeding Short-eared Owls (Asio flammeus) in the UK: an interim report from pilot fieldwork in 2006
Developing methods for the field survey and monitoring of breeding Short-eared Owls (Asio flammeus) in the UK: an interim report from pilot fieldwork in 2006
Citation
Calladine, J., Garner, G. & Wernham, C. 2007. Developing methods for the field survey and monitoring of breeding Short-eared Owls (Asio flammeus) in the UK: an interim report from pilot fieldwork in 2006.