Birds come in a wide variety of colors. Some feature relatively dull plumage, while others sport brightly colored feathers.

"And one of the leading hypotheses is that the male has elaborate ornaments or colors that are attractive to the female." Most birds with bright yellow or red feathers — think goldfinches and ...

One enzyme has a key role in determining whether parrots’ rainbow plumage emerges in vibrant ... in yellow and green feathers than in red ones, suggesting that the enzyme helps feathers color ...