The birds are made of paper that have a moisture-resistant surface coating. I hired a paper conservator* from Philadelphia to make them; if you’re interested I can find out if she’s available to make them for you. (Just email me the request from my website Contact link.)
*(Note: A paper conservator -- not to be confused with a conservationist -- is someone who fixes things made from paper – like drawings, watercolors, and even historic wallpaper.)
The wall color is Sherwin-Williams ProMar 200 "Modest White", Eggshell.