To know what a tropical bird is, you first have to know where the tropics are. The tropics form a band around the equator bordered by the Tropic of Cancer in the north and the Tropic of Capricorn in ...

How yellow and blue make green in parrots. Cell Press. Journal Cell DOI 10.1016/j.cell.2017.08.016 ...

ABOVE: A parrot feather JONATHAN BARNSLEY, UNIVERSITY OF OTAGO, NEW ZEALAND. T he red and yellow feathers of parrots aren’t really that different at the chemical level, despite their unmistakable hues ...

A bird named Groucho ruffled some feathers in the Pennsylvania state Senate this weekend in Harrisburg. Groucho is a yellow-napped Amazonian parrot who was brought to the chambers to help lobby ...

Although other birds also produce yellow and red feathers, parrots evolved unique pigments, called psittacofulvins (from the ancient Greek 'psittakós' for parrot, and the Latin 'fulvus' for ...

They found that the birds had most likely been kept in captivity and plucked often for their bright red, yellow, blue, and green feathers. To get to the desert, the birds must have been captured ...