Citation
Sparks, T.H., Atkinson, S., Lewthwaite, K., Dhap, R., Moran, N.J. & Tryjanowski, P. 2017. Can bird abundance declines be detected by citizen science programmes? A case study using Common Cuckoo Cuculus canorus. Avian Biology Research 10: 245. doi:10.3184/175815617X15036738758862