[a idea i might scarp the idea]
a bird that when born they have no colored festhers and after a few minutes there feathers take the colors around them and thats what there feather look like. this also affects where they live,eat, and how there wings,tails,beaks and ears look

the rarest ones are redmoons,newmoons,eclipse[ms?],deepsea[hatch under water],crystalfeathers[hatch in a cave with crystals around],citylights[hatch in cities, they're rare cause these birds rarely go near cities]