An Evolutionary Enigma: The Sapayoa
The Sapayoa (Sapayoa aegnima) is so different from other passerine birds that it is currently placed in its own family, Sapayoidae. It is restricted to lowland and foothills (to 600 m.) evergreen forest in the Chocó between central Panama and northwestern Ecuador. It is an inconspicuous, olive-yellow bird of the forest understory that perches upright and catches insects, where it is uncommon to rare. But although the Sapayoa—whose scientific name actually contains the