22K views · 496 reactions | The cheerful songs and whistles of the Northern Cardinal are some of the first sounds of spring. A special structure in the throat produces the birds' sweeping notes, and both males and females sing. Join sound recordist Greg Budney and learn more in our Video of the Week. | Cornell Lab of Ornithology | Facebook

A female Northern Cardinal, two male Red-winged Blackbirds, and a female Red-winged Blackbird visit the Hand of Snacks. A male Northern Cardinal looked interested but preferred to pick up any fallen food. | Jocelyn Anderson Photography

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