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This rare bird is doomed to loneliness ... The reason for this was the amazing trick of nature.
The Cardinals are found in North America, and because of their melodic singing often called "virgin nightingale," the title of one of the US states. In addition, the Cardinals - the bird family: their pairs, like swans, created for life. But the Cardinal was not too good ...
Cardinal in this photo - a very rare ginandromorf different sexes: on the left side it has a bright red plumage of the male, and the right - a brownish-gray plumage of the female.
Ginandromorfy occur naturally among butterflies, lobsters and chickens, for example, however, researchers rarely have the opportunity to watch them.
A pair of researchers led by Brian Feast for 40 days watching bilateral ginandromorfnym northern cardinal at the feeder in the northwest Illinois. Not once did the bird not seen in a couple of the other, and never heard her sing.
In most mammals, sex chromosomes determine the sex of the gonads (animal organs producing germ cells) in the early period of releasing hormones that determine the sex of the organism. Birds also have another system - ZW-chromosomes in which the hormones are not playing virtually no role. In studies of zebra finch, which had half the female brain - half male, the researchers found that the differences were determined by neurons, but not the gonads. When examined chickens, then we determined that the female half consists mostly of female cells with female hormones and the male half - of the male cells with male chromosomes. These cells seem to follow their own instructions, and not those that set the gonads.
Sometimes genetics throws fancy tricks, thanks to which we can observe an amazing phenomenon. However, most of these changes are not for the better. But science does not stand still, and people gradually learn to control the genetic process to prevent the development of dangerous diseases.
www.iflscience.com/plants-and-animals/half-female-half-male-cardinal-lonely-bird
Cardinal in this photo - a very rare ginandromorf different sexes: on the left side it has a bright red plumage of the male, and the right - a brownish-gray plumage of the female.
Ginandromorfy occur naturally among butterflies, lobsters and chickens, for example, however, researchers rarely have the opportunity to watch them.
A pair of researchers led by Brian Feast for 40 days watching bilateral ginandromorfnym northern cardinal at the feeder in the northwest Illinois. Not once did the bird not seen in a couple of the other, and never heard her sing.
In most mammals, sex chromosomes determine the sex of the gonads (animal organs producing germ cells) in the early period of releasing hormones that determine the sex of the organism. Birds also have another system - ZW-chromosomes in which the hormones are not playing virtually no role. In studies of zebra finch, which had half the female brain - half male, the researchers found that the differences were determined by neurons, but not the gonads. When examined chickens, then we determined that the female half consists mostly of female cells with female hormones and the male half - of the male cells with male chromosomes. These cells seem to follow their own instructions, and not those that set the gonads.
Sometimes genetics throws fancy tricks, thanks to which we can observe an amazing phenomenon. However, most of these changes are not for the better. But science does not stand still, and people gradually learn to control the genetic process to prevent the development of dangerous diseases.
www.iflscience.com/plants-and-animals/half-female-half-male-cardinal-lonely-bird
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