Freile et al. • NATURAL HISTORY OF THE ROYAL SUNANGEL 
89 
(B) 
FIG- 2. Spectrograms of three vocalization of male Royal Sunangel (Heliangelus regalis) in ridgetop habitats in the 
Nangaritza Valley of southeast Ecuador. A 1 and A 2 = feeding calls; B = aerial displaying calls. Tape-recordings by Paolo 
Piedrahita and Juan F. Freile filed at www.xenocanto.org, XC 45910-45912; figures by Paolo Piedrahita. 
should be noted that B. quinquinerve was absent 
from our study area. Dauphine et al. (2008) also 
reported few food plants, but failed to identify 
frem to the species level and provided no 
ln formation on flowering at their study site. Males 
and females, as previous authors (Seddon et al. 
1996, Dauphine et al. 2008) have suggested, 
might feed at different elevations or different food 
plants; a suggestion we failed to prove as we 
observed few females. 
