https://www.bto.org/our-work/science/publications/reports/research-reports/00496-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: final report from pilot fieldwork in 2006 and 2007
Developing methods for the field survey and monitoring of breeding Short-eared Owls (Asio flammeus) in the UK: final report from pilot fieldwork in 2006 and 2007
Citation
Calladine, J., Garner, G. & Wernham, C. 2008. Developing methods for the field survey and monitoring of breeding Short-eared Owls (Asio flammeus) in the UK: final report from pilot fieldwork in 2006 and 2007.