Growing these new feathers will allow Pesto to eventually swim. While king penguin chicks' brown feathers are insulating, they are not waterproof, which is where their adult plumage comes in handy.
Green feathers, meanwhile, result from yellow feathers topped with the blue-producing nanostructures. Black, gray and brown feathers are produced by an entirely different pigment called melanin.
BILLINGS, Mont. (AP) — America’s golden eagles face a rising threat from a black market for their feathers used in Native American powwows and other ceremonies, according to wildlife officials ...