1. Performance of a points-based scoring system for assessing species limits in birds. Issue 2 (9th April 2021) Authors: Tobias, Joseph A; Donald, Paul F; Martin, Rob W; Butchart, Stuart H M; Collar, Nigel J Journal: Ornithology Issue: Volume 138:Issue 2(2021) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗