The 'Clements' Checklist, now in its 6th edition, is probably the most widely used checklist of world birds. Now listing almost 10,000 species of birds, this is the list of choice for members of the A
First published in 1972, Jim Clement's checklist of the world's birds spurred a new industry in birdwatching, with enthusiasts traveling the world seeking to fill in their copy of Clement's comprehens
