Night vision of butterflies. Free Technical Library News

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night vision of butterflies

01.03.2003

"In the dark, all cats are gray," says the proverb. This is true for humans, but not for some butterflies.

As zoologists at Lund University (Sweden) have shown, certain moths can distinguish colors under illumination, which for a person is equal to complete darkness. The wine hawk-moth distinguishes at night, against the background of green foliage, white and yellow flowers, the nectar of which it feeds on.

Experiments carried out in almost complete darkness showed that hawk moths are able to distinguish at night even shades of yellow, which are hardly distinguishable by a person in daylight. Since these butterflies are active at dusk and at night, they need such vision.

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