A Japanese company that has been developing crow repellants for 15 years claims that its Crow Buster, a translucent piece of yellow plastic, is more effective than any scarecrow.

Crows are auspicious omens in Japanese culture, but in day-to-day life, they can be quite pesky pests. Notoriously intelligent and highly adapted to both rural and urban environments, crows have been known to cause serious damage to fruit and vegetable farms, rummage through garbage in search of food, and attack smaller birds, animals, or even humans, if they perceive them as threats. Because of their higher-than-average bird intellect and excellent memory, crows can be very tough to deal with, so even the most realistic of scarecrows may prove ineffective. However, one Japanese company claims that all you need to keep crows at pay is its surprisingly simple Crow Buster.

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For the past five months, the people of Pravia, a town in Spain’s Asturias Region, have been under constant siege from flocks of crows who mindlessly attack their homes and vehicles.

The town of Pravia has no less than six crows proudly displayed on its historic coat of arms, so it’s safe to say that people here have been living in harmony with the birds for centuries. That is not the case anymore, however, as large flocks of blackbirds now attack the homes and vehicles of human residents for some unknown reason. The people of Pravia started reporting groups of birds mindlessly flying into their windows repeatedly until the impact caused them to bleed in May of this year, and things have been getting worse ever since. No one knows exactly why the crows are targeting people’s homes and vehicles, but they are relentless in their attacks, pecking at and flying into windows until they start to bleed.

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A team of Dutch researchers has discovered that magpies and crows are using metal spikes designed to keep them away from certain urban areas to reinforce their own nests and keep intruders at bay.

Scientists have known for a while that magpies and crows are some of the most intelligent birds in the world, but even they were baffled by their amazing ability to adapt to hostile urban environments. It’s not unusual for birds to use human trash and debris as tools and building materials for their nests, button see them use the very things we humans use against them was nothing short of baffling for researchers at the Natural History Museum in Rotterdam and the Naturalis Biodiversity Center in Leiden, in the Netherlands.

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Corvid Cleaning, a Swedish startup specializing in training crows to pick up litter in exchange for food, claims that its program could save communities a fortune in cleaning costs.

According to the Keep Sweden Tidy Foundation, over a billion cigarette butts are left on Sweden’s streets every year which represents about 62 percent of all litter. Teaching humans not to throw cigarette butts on the street has so far proven impossible, but a Swedish startup claims it can teach crows to pick up after us and save local communities millions of krone in cleaning fees every year. Corvid Cleaning teaches wild crows to do our dirty work through a step-by-step learning process, that involves rewarding the birds with food for every cigarette butt they collect.

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They say crows have great memory and never forget those who have wronged them, and the story of an Indian tractor driver who claims to have been constantly attacked by crows ever since they saw him pick up some of their hatchlings, a year and a half ago.

Mohanan, a tractor driver from Ambalavayal, a town in India’s Kerala state, has been carrying a stick and an umbrella to work every day, for over a year. It’s not that he fears getting attacked by dogs or that he hates rain, but that he needs to defend himself against the crows that always attack him whenever he approaches a bus station where he once picked up two crow hatchlings from under his tractor and placed them on the side of the road. As Mohan recalls, the following day, he and his colleagues found a small puppy covered in tar and washed it clean with kerosene, and he assumes the crow must have seen him and confused the puppy for the hatchlings that he had handled the previous day. The crows have been on his case ever since, harassing and attacking him whenever they see him.

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For the last three years, a man in India’s Madhya Pradesh state has been living a real-life daily nightmare inspired by Alfred Hitchcock’s ‘Birds’. Every time he walks out of his house, he gets attacked by a murder of crows. The strange thing is the birds only target him.

Shiva Kewat, a daily wage labourer from Sumela village, says his troubles with crows began three years ago, due to a misunderstanding. One day, as he was walking on the street he noticed a crow chick stuck in iron netting, but despite his efforts to help the small bird escape, it died in his hands. Some of the rows must have seen the scene and assumed that he killed their young, because they’ve been attacking him ever since. Sometimes they come for him in groups, otherwise it’s just a single bird, but Kewat always carries a stick with him to fend off their sharp beaks and talons.

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Alarmed by how many cigarette butts littered the parks of Amsterdam, two Dutch designers came up with an unusual plan to train crows to pick up the butts and trade them for tasty rewards.

Industrial designers Ruben van der Vleuten and Bob Spikman originally considered using robots to clean the streets of cigarette butts, but they presented a series of difficulties, particularly the complicated programming required to have them vacuuming the buts out of every nook and cranny while trying to avoid bicycles and passers-by. So they turned their attention to one of the most abundant resources of urban areas – birds. Pigeons were the first ones they considered, because they can be found in virtually every city in the world, but a quick search revealed that they aren’t really known for their intelligence, so training them would have been very hard. But the two designers soon found a bird that was both very common around human settlements and much, much smarter – the crow.

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When a friend and “crow expert” told Katsufumi Sato to hang some “do not enter signs” on the outside of a building to keep pesky crows a way, the Japanese professor thought he was only kidding, but after three years of employing the bizarre strategy, he says it works perfectly.

Sato, a professor of ethology, hanged his first “crows do not enter” signs at a university research center in Otsuchi, Japan’s Iwate Prefecture, in 2015, at the the advice of his friend, Tsutomu Takeda, who he regards as an expert on crows. The birds had been targeting the insulation material covering the building’s pipes, ripping it with their beaks and flying away with bits of it to use for their nests. He was desperate to keep them away, so even though he though the idea of hanging written signs for crows funny, he was willing to give it a try.

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8-year-old Gabi Mann, from Seattle, has some very unusual friends who shower her with gifts almost every day. Ever since she started feeding her neighborhood crows, they began returning the favor and bringing back all kinds of trinkets.

Gabi’s unique relationship with the neighborhood crows began in 2011, when at age four, she was prone to dropping food. Soon, the crows were always watching for her, hoping to get a bite of the crumbs she dropped. As she got older, she began to feed them consciously – she would share her lunch with them on the way to the bus stop. It wasn’t long before crows were lining up in the afternoon to greet her at the stop.

In 2013, Gabi started feeding the birds regularly, instead of sharing her scraps with them. Along with her family, she would fill the birdbath in the backyard with fresh water every day, cover the bird feeder platforms with peanuts and throw handfuls of dog food on to the grass. Soon, the crows automatically lining up on the telephone lines, waiting for their treats.

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Crows are known to be highly intelligent birds, and it looks like they can now teach us a thing or two about recycling and stealing. The Asian Jungle Crow, a large-billed crow, actually builds its nest out of coat hangers that it steals from people’s homes!

Crows make use of pretty much anything they find lying around to build their hardy nests. House Crows generally build crude structures, made of interlocking twigs gathered from surrounding trees and shrubs. They weave the twigs together with little pieces of metallic wire that strengthen the nest structure. In some nests, the clever crows incorporate knotted lengths of thick plastic instead.

But perhaps the most amazing crow nests are the ones built around Tokyo, Japan. Twigs and other natural materials are hard to come by in the busy metropolis, so the birds settle for the next best thing, and that seems to be coat hangers. You have got to see pictures to believe it! A blogger had posted some of these images way back in 2005, after solving the mystery of the missing hangers from her back yard. But it isn’t just the one nest – it seems that Japanese Jungle Crows are compulsive collectors of hangers!

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In April 2005, a small pond in Hamburg, Germany became the center of a great mystery, rather repulsive in nature. A documentary film made on the phenomenon reported:

“About 1,000 dead toads were discovered lying around the edges. Their bodies appeared to have exploded. Eye-witnesses said they swelled up to about three-and-a-half times their normal size and then simply burst. And they burst with such an explosive force that their entrails were blown over several square meters.”

For several weeks, the common European toads in question received international attention. Scientists were totally baffled, unable to provide an explanation for the unnatural deaths. Health officials panicked – they suspected a virus spread by South American race horses from a nearby track. The tabloid press had a field day with the story, labelling the area ‘The Pond of Death’. Things got worse when the epidemic spread across the border to a nearby Danish lake.

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