Buteo melanoleucus
editI was fearing as much ;-) But wouldn't it be 59.3 ("replaced before 1961")? Have fixed it, check it out. This might even go on the mainpage as Did You Know - that two species have essentially switched senior synonyms is probably rare indeed... it's basically a coincidence of time; if Hellmayr & Conover had proposed to use fuscescens after 1960 instead of in 1949, it would be the name to use.
Altogether this is probably the weirdest case of synonymy/hjomonymy I have come across since long. Thanks for notifying me! 08:12, 3 November 2008 (UTC)