iridescent colors of feathers are caused by thin laminae or films 
in the barbules which produce interference colors. No colors 
due to selective reflection have been detected in any of the me¬ 
tallic feathers which have been studied. The birds examined 
include: 
Black Minorcas and Rhode Island Reds ( Gallus) 
Bronze-winged Pigeon (Columbia phaps) 
Common Pigeon 
Green Heron (Ardea virescens) 
Wood Duck {Aex sponsa) 
Mallard (Anas boschas) 
Sommering Pheasant (Phasanius sommeringi) 
Monaul Pheasant (Lophophorus impeyanus) 
Golden Pheasant (Thumalea picla) 
Chinese Pheasant (Phasanius torquatus) 
Peacock Pheasant (Polyplectrum bicalcaratum) 
Bronze-headed Trogon 
Peacock (Pavo cristatus) 
Musciroia mexicana 
Plilopus puella 
Plilopus pulchellus 
Lamprocolius phoenicopterus bispecularis 
Purple Grackle (Quiscalus purpureus) 
Jacamar (Jacamarops aureus) 
Ruby-throated Humming Bird (Trochilus colubris) 
Red Kingbird of Paradise 
Wild Turkey (Meleagris americana) 
Nettion brasiliense 
Starling (Slurnus vulgaris) 
Muscovy Duck (Cairina tnoschala) 
