How does a bullfinch look in the lens of a night vision device in a cold winter? Detailed answer

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How does a bullfinch look in the lens of a night vision device in a cold winter? Detailed answer

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How does a bullfinch look in the lens of a night vision device in a cold winter?

If you point the lens of a night vision device at a bullfinch in cold winter (as well as any other bird that feels comfortable in winter cold), only a bird's eye will appear on the screen.

The fact is that the thermal conductivity of bird feathers and down is very low (1,5-2 times less than the thermal conductivity of dry air), and therefore the down and feathers of a bullfinch reliably protect it from heat loss even in the most severe frosts.

The wool and fur of many animals have the same property. It is said that at one time attempts to detect with the help of night vision devices the caravans of the Mujahideen in Afghanistan, smuggling weapons from Pakistan at night, ended in failure: they were protected by blankets made of camel hair.

Author: Kondrashov A.P.

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