AVES ARDEID/E. 393 



Back : Interscapular region and upper scapulars deep black with a dull 

 greenish gloss. Lower back, rump and upper tail-coverts deep smoky 

 brown. 



Tail : Deep smoky brown. 



Wings : Entirely deep smoky brown, darker than elsewhere and with 

 a dull gloss of oily green on the exposed surfaces of some of the longer 

 feathers. 



Lower parts : Uniform smoky brown, becoming isabelline or whitish 

 about the posterior part of the abdomen and about the vent. Lower tail- 

 coverts smoky brown, as are the lower wing surfaces and axillaries. 



Fig. 206. Fig. 207. 



Nycticorax cyanocephalus, adult male. 7804 Nycticorax cyanocephalus. 7804 P. U. O. 



P. U. O. C. Pacific slope of the Cordilleras, C. Details of unfeathered portion of leg and 

 Patagonia. foot. 



Bill : Dull blackish (Hatcher). 



Iris : Cherry red (Hatcher). 



Iris : " Dull orange " (Peterson). 



Feet: Dull greenish yellow (Hatcher). 



Naked skin about eye : Dark blue (Hatcher). Dr. Coppinger has 

 spoken of the iris of this heron as " orange " and no doubt winter speci- 

 mens generally and a few breeding examples have eyes of that color. 

 Herons' eyes in many species at least vary much in color, not only with 

 aee, but at different seasons in adult birds. 



