This is only the second recorded example of bilateral gynandromorphy in a Green Honeycreeper (Chlorophanes spiza), the previous report dating back to 1914.And in that case, it was blue on the left ...

Researchers have spotted an “extremely rare” green honeycreeper in Colombia that’s half female and half male. The bird’s plumage is divided directly down the middle, with blue feathers ...

How a bird sees a rainbow In addition to blue, green and red cone cells, many birds have cone cells that are sensitive to ultraviolet light, allowing them to see a broader spectrum of colors than ...