https://www.bto.org/our-work/science/publications/papers/influence-survey-frequency-population-estimates
The influence of survey frequency on population estimates of moorland breeding birds
The influence of survey frequency on population estimates of moorland breeding birds
Citation
Calladine, J., Garner, G., Wernham, C. & Thiel, A. 2009. The influence of survey frequency on population estimates of moorland breeding birds. Bird Study 56: 388. doi:10.1080/00063650902984604
