In a backyard in Erie, Pa., an unusual cardinal has appeared, displaying both male and female traits. Scientists say it may be a so-called gynandromorph. By Karen Weintraub A bird hopping outside ...

The bluebird feeds mainly on insects and other invertebrates (such as moths, worms, flies, ants, etc.), but they will search for berries, especially in winter. You will often see them perched on wires ...

What Do Cardinal Eggs Look Like? There are a few ways to identify Northern cardinal eggs. First, look at their general color. The eggs of these birds come in hues of off-white, such as grayish white ...

This ‘Extremely Rare’ Bird Is Half Female, Half Male The green honeycreeper is only the second of its species ever observed with this condition—and the first recorded in more than 100 years ...

The beautiful male cardinal bird in this hilarious YouTube clip is very interested in a female and is not being subtle about it! The obvious way he is checking her out may seem amusing to us, but ...

The beautiful male cardinal bird in this hilarious YouTube clip is very interested in a female and is not being subtle about it! The obvious way he is checking her out may seem amusing to us, but ...

The male and female nuclei go on to form the two separate halves of the same bird. In this scenario, the bird can be either sex on either side, depending on how the female's chromosomes are split ...

Since so much in nature has a purpose, what's the story behind a male cardinal's bright red feathers, ... Many bird experts now say that female birds are the major drivers of color in male birds.

Writing in Proceedings of the Royal Society B, Schlicht et al. 1 support this idea by showing that the intense dawn chorus of male birds can be explained by the absence of female partners.