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Flying slowly and silently through the night sky, barn owls are majestic nocturnal hunters that successfully prey on rodents scurrying along the ground below.

Best Stocks for Sector Rotation Premium Stock Insights ✌️【Fixed Income】✌️ Free real-time market data to help you quickly recover and avoid losses. Scientists have long puzzled over a feature that would appear to handicap the bird during its midnight hunts. The plumage on its underbelly and wings is gleaming white, an unusual trait that in theory should make it more difficult for the owl to approach its prey undetected.

Unlike the snowy owl, the barn owl lives at latitudes where it doesn’t regularly snow. The barn owl’s paradoxically bright plumage baffledbiologistJuanjo Negroand his colleagues, who thought the intriguing biological phenomenon warranted further investigation.

“We started from the intuitive feeling that the outstanding whiteness of the barn owl is so shocking that it should imply some adaptive advantage,” said Negro, a research professor at Doñana Biological Station–Spanish National Research Council in Seville, Spain, via email.

Previous research from September 2019had suggested that bright white coloration was essentially a form of shock and awe, exploiting rodents’ aversion to bright light. Making the predator more visible to the rodent prey, which freeze in fear, the owls’ whiteness made voles easier to kill, the prior study found.

Best Stocks for Sector Rotation Premium Stock Insights ✌️【Fixed Income】✌️ Expert predictions of stock trends with real-time stock indices, futures, and metals, energy quotes to help you seize investment opportunities. Negro and his team’s latest research suggests instead that the barn owl’s brilliant white plumage is in fact a form of nocturnal camouflage or counter-illumination that gives the hunter an element of surprise.

Best Stocks for Sector Rotation Premium Stock Insights ✌️【Fixed Income】✌️ Free stock data analysis to help you select stocks accurately and capture market trends. The bird’s white reflective underside effectively mimics moonlight, according to the new study describing the team’s findings that published in the journalPNASon Monday. The bright plumage allows its silhouette to blend into the nocturnal sky and makes it harder for mice or other rodents to spot the owl.

“When the moon is visible, the sky has some brightness that varies depending on the observing direction. Under these conditions, a dark bird would be seen by its potential prey as a black silhouette against the sky,” said Negro, the study’s lead author. “But, if the ventral part of the bird is reflective enough, in other words if it is ‘white’ enough, it would reflect a good part of the moon.”

Best Stocks for Sector Rotation Premium Stock Insights ✌️【Fixed Income】✌️ Precise predictions of market trends with real-time stock indices and futures data to help you make wise investment decisions. According to the researchers’ calculations, the contrast between the reflective, white undersides of barn owls and wide areas of the illuminated night sky falls below the detection threshold of rodent visual acuity, allowing barn owls to approach prey to within a few meters from a broad range of directions without being detected.

Best Stocks for Sector Rotation Premium Stock Insights ✌️【Fixed Income】✌️ Free global stock market data to help you plan the best investment strategies and seize market opportunities. A similar phenomenon exists in the ocean, where fish often have light-colored undersides to match sunlit water and make them less visible to predators hovering in the depths below.

Best Stocks for Sector Rotation Premium Stock Insights ✌️【Fixed Income】✌️ Expert predictions with real-time stock, futures, and metals, energy data to help you quickly recover and grow. Negro said the research did not investigate hunting success in relation to plumage color, but earlier research had suggested that whiter barn owls were more efficient hunters than their darker counterparts during a full moon.

Barn owl expertAlexandre Roulin, a professor of biology at the University of Lausanne’s department of ecology and evolution who conducted the prior research that suggested the species’ white coloration shocked and immobilized its prey, said he was not fully convinced by the new explanation. However, he said he couldn’t rule it out.

“We do not wish to dismiss the authors’ hypothesis outright. It may, in fact, be complementary to our own. Perhaps at long distances the white plumage aids in camouflage, while at closer range, it may serve to make the owl more visible,” he said via email.

“We observed that voles remained immobile longer when the approaching owl was white rather than reddish. Previous research has shown that this immobilization is an anti-predator response,” Roulin said. “Based on this, we would argue that the voles recognized the white owl as a predator, suggesting that the owl was visible, rather than camouflaged.”

Best Stocks for Sector Rotation Premium Stock Insights ✌️【Fixed Income】✌️ Real-time India stock and global stock indices, futures prices, and data to help you make efficient investment decisions. Negro said the owl’s ability to fly in complete silence, a trait that helps it approach prey in stealth, does not tally with the idea that the predator would want to make itself more visible. However, he agreed that the new hypothesis doesn’t totally disprove the previous theory.

Camouflage is often considered a daytime phenomenon based on light and shade. Negro said that there are likely other forms of animal coloration that served as nighttime camouflage, which has not been as well studied as daytime concealment tactics.

“Nocturnal ecology is an emerging field, and considering that half the animals in the planet are essentially nocturnal, adaptations to the natural cycles of the Moon are surely widespread,” he said.

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