These objects contain "sphere-type" and "channel-type" nanostructures responsible for their optical properties. Detecting UV from these objects that have a UV reflectance as high as 10% is one of the major functions of a class of cones that contains T-type droplet oil. These objects contain melanosomes (-5[1])in "hollow platelet" and "hollow rod" shapes. After (15[1])studying how the color of these objects varies with climate, Constantin Gloger proposed his namesake (-5[1])rule. (-5[1])Both (-5[1])insect scales (15[1])and these objects contain gyroid-shaped (*) photonic crystals. Robert (-5[1])Hooke is generally credited (-5[1])with discovering structural coloration (10[1])after submerging one of these iridescent objects (10[1]-5[2])in water (10[1])to wash away pigment, and finding their color (-5[1])remained. James Gregory discovered diffraction gratings by passing sunlight (10[1])through the barbs and barbules of these objects. For 10 points, name these colorful objects that compose plumage. (10[3]) (10[6])■END■