Nigel J. Collar,^* Stuart H. M. Butchart,^* Thomas M. Brooks,^** Russell A. Mittermeier,^*** Simon N. Stuart<sup>****


*</sup>Nigel J. Collar (nigel.collar@birdlife.org) and Stuart H. M. Butchart are with BirdLife International in Cambridge, United Kingdom.
^**Thomas M. Brooks is with NatureServe in Arlington, Virginia.
^***Russell A. Mittermeier is with Conservation International in Arlington, Virginia.
^****Simon N. Stuart is with the International Union for Conservation of Nature Species Survival Commission, UNEP World Conservation Monitoring Centre, in Cambridge, United Kingdom.