Birds Cardinals are passerine birds native to the continents of North and South America. They have a variety that makes them an interesting bird for ornithologists. In terms of size, usually measuring about 12 cm long and weigh about 12 g, although you can find a variety that is 25 cm long and weighs about 85 g.
The family of birds Cardinals is divided into 5 species, which share characteristics that are derived from a common ancestor. Each of these species are divided into some subspecies. Its name derives from its bright red color, but not many people are aware of an important fact is that only males of this species have bright red color, while females have a slightly duller appearance.
This is considered as an adaptation of the species, which helps to attract the opposite sex for mating. They tend to gather in large flocks of about 70-100. These birds are omnivorous. Their diet includes seeds and grains, and a wide variety of insects.
One of the most popular species of birds of North American cardinals, Cardinal is the North. It is well known in the states of North Carolina, West Virginia, Ohio, Illinois, Indiana, Kentucky and Virginia. Interestingly, the Cardinal is the only bird with a red crest of the United States. Males are responsible for defending their territory and they do very well. A male cardinal can fight his own reflection for several hours if you encounter him in a mirror.
Source: http://www.conferenceofbirds.net/passerine-birds-native-north-american-continent-449.html
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