An example of a phenomenon known as gynandromorphy, this rare half-male, half-female cardinal was spotted by bird-lovers in Pennsylvania. https://on.natgeo.com/2GmleVI | National Geographic

20K views · 684 reactions | In our Video of the Week, sound recordist Greg Budney talks about the brilliant song of the Northern Cardinal. Both male and female cardinals sing, and they are some of the first birds to start singing in the year, bringing a blaze of color and sound to the gray days of late winter and early spring. | Cornell Lab of Ornithology | Facebook