Posted in Science & Nature

Badass Weapons Of Nature: Long-tailed Weasel

Long-tailed weasels are ferocious predators found in North America that likes to stalk its prey and pounce it with lightning speed. With small prey such as mice, the weasel will wrap its long body around the prey and then crush the head with a strong bite. As the weasel is very slender and sleek, it can easily dig into burrows to hunt hiding animals by crushing its skull, or to add variety, ripping out the windpipe.

Although it usually preys on small rodents, the long-tailed weasel is also known to fearlessly attack much larger animals such as birds and rabbits. As wild rabbits tend to be bulkier (sometimes even ten times larger) than the weasel, it cannot use its characteristic hunting style. To overcome this difficulty, these weasels have developed a strange behaviour that zoologists have labelled the Weasel War Dance. The War Dance (NB: two videos on what it looks like) is a chaotic set of movements where the weasel runs left and right frantically, jumping and flipping upside-down and almost appearing insane. This type of behaviour is observed in other species of weasels and ferrets when they are excited, but few use it as a hunting tool.

It has been observed that when the long-tailed weasel performs a War Dance in front of a rabbit, the rabbit becomes dazed and enters a trance-like state. It is possible that the chaotic and confusing movements disorient the rabbit. Once the rabbit has been disabled, the weasel promptly jumps on the rabbit’s back and delivers a powerful bite to the back of the neck, instantly killing the rabbit.
Wild weasels and stoats practise this skill by playfully ambushing each other when they are young.

Long-tailed weasels, despite their cute appearance, are notorious for their vicious temper. Being a carnivore that prefers fresh meat, it actively hunts and collects food. Despite seeking fresh food, the weasel also exhibits a curious behaviour of storing carrions, which is often only eaten in times of food shortages. This behaviour leads to the weasel going on killing sprees just because they can. Long-tailed weasels have also been observed lapping up blood from the wounds they inflict, and enjoys making their nest from the fur of their victims.

Posted in Science & Nature

Animal Hypnotism

Animals can be hypnotised just like humans. Strictly speaking, it is not hypnotism per se but more of a trance or putting the animal to “sleep”. An animal in trance is in a state of complete relaxation and is immobile, staying still as if it is sleeping as its heart rate and breathing slows. After a certain amount of time, the animal wakes up and acts as if nothing happened.

For example, flipping a rabbit on its back causes it to stay still. It merely twitches its nose but its limbs are completely stiffened. An alligator shows the same response when flipped.
A pheasant can be put into trance if its stomach is rubbed and an iguana falls asleep when stroked on the head as the heat sensing organs are activated and they feel relaxed.
When stroked on its most sensitive part, the nose, a shark freezes from the intense sensation (considering a shark dies if it stops swimming, this must be quite a pleasurable feeling for the shark).
If you turn a lizard on its back and rub its stomach, its diaphragm and respiratory organs are compressed and oxygen supply is limited. This causes the lizard to “turn off”, falling into a trance.

These strange responses are most likely a survival instinct. For example, if a rubber hose with a knot on the end is held in front of a mouse, it will stay absolutely still. This is because it mistakes it for a snake and is frozen from fear. Also, predators such as snakes focus their vision around movement sensing and thus are blind to immobile objects. Similarly, rabbits and alligators mentioned above are playing dead to avoid danger.

Unfortunately, this instinct produces the opposite effects sometimes. Chickens are a good example.
When you press a chicken’s head against the ground and draw straight lines in front of it, it suddenly goes quiet as if possessed. Even after taking off the hand, it stays still. This technique was devised to make the process of cutting off the chicken’s head an easier task. Also, a chicken can be put into trance by gently tucking its head under its wing and then swinging the whole chicken side to side about 10 times. A turkey can be put to sleep the same way.

Posted in Psychology & Medicine

Madness

“As mad as a hatter” – this is a well-known English idiom, particularly famous after Lewis Carroll created the Mad Hatter character in his work Alice in Wonderland. However, what is less known is the fact that this idiom is based on actual events.

In the 18th and 19th centuries, hatters used mercury to treat felt (traditionally made from rabbit fur or the more luxurious beaver fur). Unfortunately, mercury is a highly toxic heavy metal, which causes severe damage in the human body. In the case of mercury poisoning (also known as Minamata disease or the Mad Hatter disease), it infiltrates neurons to cause severe neurological symptoms. For example, it can impair vision and hearing, cause paresthesia (pins and needles), anxiety, depression, tremors and hallucinations. The famous physicist, Isaac Newton, also suffered from Mad Hatter disease.

Another mad character from Alice in Wonderland is the March Hare. As one may deduce from his name, he is modelled after a normal hare. The reason why the March Hare is mad is that March is around the time when rabbits enter their mating season, and male hares are in heat. They then have only one thing in mind: sex. 

Maybe, as the Cheshire Cat explains, “we’re all mad down here”.

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Posted in Psychology & Medicine

Rabbit Or Duck

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What do you see in the above picture? A rabbit? A duck?
This image shows a phenomenon first described by an American psychologist, Joseph Jastrow, in 1899 and tells us a few things about the brain’s way of processing visual information.

Firstly, this picture is neither a duck nor a rabbit. However, our brain tries to match it to what it has seen in the past, and in that process (for example) it decides it must be a rabbit. Then when the same picture is presented, it decides it must be a duck, because the picture appears to match both figures and the brain randomly decides it can only be one of them.

This experiment proves that the human brain does not simply record visual information on to film (memory), but instead processes it first then records it. This is the reason we see UFOs in clouds, the face of the Virgin Mary on burnt toast or a rabbit on the moon. This phenomenon is called pareidolia, when the brain gives a meaning to what is actually a random visual stimuli. Due to this, we cannot totally trust what we see.

Also, this picture teaches us a valuable lesson regarding our perception. From one point of view it is a rabbit, but from another it is a duck. This kind of scenario is seen countless times in life, such as a song you hated that suddenly sounds great, or a guy you once thought was a tool appearing wonderful all of a sudden, or a girl you never even considered becoming attractive one day.
Like this, perception can not only be affected by optimism and pessimism, but even small things like emotions or random events.