The longer winter goes on, with its monochrome palette, leafless branches and profound silence, the more we appreciate the brilliantly red Northern cardinal. Cardinals visit our backyards and ...

The female, though more subtly colored, is also lovely to look at in winter. One snowy morning, I gazed at a female cardinal drinking some snow from the shrubs.

Female birds only have one working ovary, usually on their left side. Since this cardinal is female on the left, it's possible it has a fully functional female reproductive system.

The condition is known as bilateral gynandromorphism where animals have split male and female plumage and sexual organs. The northern cardinal was first spotted in 2014 in Texas.

As it turns out, the easiest way to tell the difference between a male and female cardinal lies in the bird's coloring. As is ...

The female does most of the nest-building but her husband does not sit idly by. While she builds, he constantly collects and delivers all the materials. He also provides her with most meals as she ...

A female Northern cardinal lays two to five eggs in a single clutch. (A clutch is the total number of eggs in one nesting attempt.) Northern cardinals don’t always mate for life, but they do ...