Male and female birds are often quite different. Looking at two individuals of radically different color, it’s sometimes easy to forget this. I often talk to people who think they have multiple kinds ...

Q. When the chicks have just hatched, how do chicken farmers tell future hens from future roosters? A. Sexing hatchlings is important for the egg industry. Roosters do not lay eggs, obviously, and ...

We all love watching hummingbirds dart around the garden. Their dazzling feats and fancies are just spectacular! But have you ever wondered whether that tiny blur of color is a male or a female? It’s ...