Graves, Gary R.; Lane, Daniel F.; O'Neill, John P.; Valqui, Thomas(2011)
A recently discovered and morphologically distinct population of the poorly known Royal Sunangel from the Cordillera Azul, Department of Loreto, Peru, is described as a new subspecies, Heliangelus regalis johnsoni. Males ...
Sanchez, Cesar; Saucier, Jacob R.; Benham, Phred M.; Lane, Daniel F.; Gibbons, Richard E.; Valqui, Thomas; Figeroa, Sheila A.; Schmitt, C. J.; Sanchez, Cynthia; Schmidt, Brian K.; Milenski, Chris M.; Garcia Bravo, Antonio; Garcia Olaechea, Diego(2012)
