Which birds can control the development of chicks in eggs by song? Detailed answer

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Which birds can control the development of chicks in eggs by song? Detailed answer

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Which birds can control the development of chicks in eggs by song?

Zebra finches, birds of the family of weaver finches, can control the development of chicks in eggs by song, adapting them to a hot climate. If the ambient temperature exceeds 26 ° C, the parent incubating eggs in the last days before hatching from time to time emits a special cry. It helps to slow down the growth of chicks, which are more resistant to high temperatures compared to their normal-sized counterparts. Scientists got the same results in the laboratory, playing a recorded song to the eggs. Adaptation also appears in the second generation, when females that weigh less at an early age produce more chicks.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

How fast does blood flow in human vessels?

The speed of blood flow in various vessels of the human circulatory system is different, and varies within a fairly wide range.

In the capillaries, blood moves at a linear speed of 0,5 millimeters per second, in arterioles - 4 millimeters per second, in the superior and inferior vena cava - 20 centimeters per second. In the main artery of the circulatory system (aorta), the blood moves in jerks, while the linear velocity of blood flow changes from 0 to 120 centimeters per second (the average linear velocity is 40 centimeters per second).

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