I have computed the bird chromaticity convex hull:
Asian Green Broadbill
Crimson Seedcracker
Emperor Fairywren
Fork-tailed Woodnymph
Golden-crowned Kinglet
Green-winged Pytilia
Long-tailed Sylph
Mountain Velvetbreast
Orange-breasted Bunting
Paradise Tanager
Violet-tailed Sunbird
Violet-tailed Sylph