When is a blue bird not blue?

Smithsonian asked Scott Sillett, a wildlife biologist at the Smithsonian Migratory Bird Center.

How To Bring Bluebirds Into Your Yard - And Stay All Summer!

Smithsonian Insider – birds

U.S. Fish and Wildlife Service - Birds, like this blue jay at John Heinz National Wildlife Refuge At Tinicum in Philadelphia, Pennsylvania, are beauties. Close-ups of their feathers are just stunning.

Smithsonian Insider – Cullinan Blue Diamond Necklace

Smithsonian Insider – birds

Not All Blue Birds are Bluebirds - Learning to Identify Birds by Color

American Museum of Natural History - Did you know the largest flying parrot in the world is the Hyacinthh Macaw (Anodorhynchus hyacinthinus)? It can weigh as much as 1.7 kilograms (3.5 pounds)

Blue Birds Aren't Blue, and This is How They Fool You

Bluebirds and Blue Birds are not Blue!

What is the prettiest type of bluebird? - Quora

Nashville Zoo - The Hyacinth macaw is the largest macaw