A small animal with a professor's mustache swims on its back, holding a stone on its belly. It cracks open a shell, squints with pleasure. Otter. Some call it the river wolf, others the water cat. It is shy, smart, playful, and very important for the ecosystem. It has its own holiday — World Otter Day. It is celebrated on the last Wednesday in May. In 2026, it will be on May 27. Let's find out why otters need attention and protection, what makes them unique, and how we can help them.

What kind of otters are there

Otter is a predatory mammal of the Mustelidae family. There are 13 species in the world. The most famous is the river otter (Lutra lutra), which lives in Europe, Asia, and North Africa. It has a long, flexible body (up to 1 meter), short legs with webbing, a powerful tail (like a rudder), a dense fur that does not let water in. The color is brown, the belly is light. Weight — from 5 to 15 kg.

In North America, there is the Canadian otter, larger (up to 140 cm, 20 kg). In South America — the giant otter (up to 2 meters, 30 kg), which is rare and listed in the Red Book. In Asia — the smooth-furred otter, almost without underfur. And separately — the sea otter (kalan), which lives in the Pacific Ocean and does not go ashore.

In Russia, the river otter is found almost everywhere except the Far North. It loves clean rivers, lakes, streams with forest banks. Due to water pollution, the otter has disappeared from many places, but it returns where rivers have been cleaned.

Habits and character

Otter is an excellent swimmer. Can dive to a depth of up to 6 meters, hold their breath for 4 minutes. Underwater, it closes its ears and nostrils. It swims faster than 10 km/h. On land, it seems clumsy, but can run up to 20 km a day in search of food.

It mainly hunts fish (trout, dace, perch), frogs, crabs, water rats. It eats 1-2 kg of food a day. It does not eat garbage — only fresh. If the fish is sick, the otter ignores it. Therefore, the otter is a bioindicator: if it lives in a river, then the water is clean.

It is territorial. One otter owns a river section 2-10 km long. It marks boundaries with feces (which smell of fish, jasmine, and musk). It does not let strangers in, but sometimes plays with neighbors.

Otters are very playful. They love to slide down clay banks into the water, float on their backs, chase each other. They even play in adulthood. In winter, they slide down ice hills. Zoologists call this "otter joy".

Why otters are disappearing

The number of otters has sharply decreased in the 20th century. Causes: hunting (the fur is very valuable), river pollution (pesticides, heavy metals), drainage of swamps, deforestation along the banks. In the 1950s, the otter almost disappeared in Europe. The population in Russia also fell, but it is recovering now.

The second reason is death in fishing nets and traps. The otter gets tangled and drowns. The third is the reduction of the food base due to overfishing. The fourth is poaching: the skin of an otter is worth up to 50 thousand rubles on the black market.

World Otter Day was established to draw attention to the problem. It has been celebrated since 2014 by the initiative of the International Union for Conservation of Nature (IUCN). The goal is to tell people about the importance of otters for ecosystems and ask them not to kill them.

How and where to celebrate World Otter Day

In Russia: zoos hold lectures and quests. On this day, in the Moscow Zoo, otters are fed live fish — so visitors can see how they hunt. In the St. Petersburg Zoo — a children's drawing contest "My Favorite Otter".

In Europe: they conduct otter counts on rivers. Volunteers look for tracks, feces, take photos. Data is sent to scientists. In the UK, there is an open day at otter rescue stations (where they treat injured and release them into the wild).

In the US: they launch the #OtterDay flashmob. People post photos with toy otters, videos from zoos, funny facts. In Japan: they pray for the purity of rivers in temples and then release fry of trout into rivers where otters live.

On the Internet: live broadcasts from otter enclosures are held. The most popular are from the Osaka Aquarium (Japan) and the Chester Zoo (UK). Otters there are YouTube stars.

How to help otters

Simple steps. Do not throw garbage in rivers and lakes. Especially dangerous are batteries, plastic, oil. Do not wash your car by the river. Maintain the cleanliness of the banks — participate in clean-up days.

If you are a fisherman, do not set nets in places where otters live. If you catch one by accident, carefully release it. Do not kill! This species is under threat. Do not buy fur products. A real otter fur coat is poaching. Synthetics keep warm just as well.

Support organizations for the rescue of wild animals — you can even translate 100 rubles. Plant trees along the river — this will strengthen the bank and provide shelter for the otter. Tell your friends about World Otter Day — the more people know, the greater the chances of saving the animal.

Interesting facts about otters

Otters have the densest fur in the world — up to 80,000 hairs per square centimeter. For comparison, humans have 200. Therefore, otters do not get wet.

Otters use stones as tools. They put a stone on their belly and hit it with a shell. They carry stones in the folds of their skin. One stone can serve for years.

Otters sleep floating on their backs. They often hold their paws to not drift apart. Pairs and families sleep this way.

Otter cubs cannot swim when they are born. Their mother teaches them, throwing them into the water and catching them. In 2 months, they are already like fish.

Otters produce up to 20 sounds: whistling, chirping, hissing, grunting, a cry of alarm, a mating call.

In captivity, otters live up to 20 years, in the wild — 10-12.

Otter in culture and myths

In Celtic mythology, the otter is a guide to the world of spirits. It was believed that anyone who killed an otter was doomed to misfortune. In Scandinavian sagas, the otter is the embodiment of the god Loki (he could transform into an otter). In India, the otter is one of the forms of the god Vishnu.

In Russian fairy tales, the otter is almost never mentioned. There is a saying: "Cunning as an otter." Or "The otter does not muddy the water, it is clean itself." In Siberian peoples, the otter is a totem animal. It was not allowed to kill it without a need.

In modern culture: the otter is a hero of cartoons (for example, "Eragon", "Princess Mononoke", the series "Zootopia"). In Japan, otters are characters of manga and anime. On the Internet, otters with stones on their bellies are a popular meme.

In sculpture: there are monuments to otters in Voronezh (on the riverbank), Riga (at the waterfall), London (in the park).

Otter and man: conflict or neighbor

Conflict: the otter may come to fish farms and eat fry. Farmers crush otters. Solution: install underground fences (otters dig), use electronic repellents. There is also a conflict: otters dig burrows in the banks, may erode embankments. But this happens rarely.

Neighbors: in Europe, otters come into cities if there is clean water. In Munich, otters live right in the city limits — in the English Garden. Tourists take photos of them. In Moscow, otters have been seen in Bittsevsky Forest and on the Sходня River. This means the water is getting cleaner.

The main thing is not to tame a wild otter. It is not a cat. It can bite, cause injury. Rabies infection is possible (rare, but there is). Admire from a distance.

What to do if you find an otter

If you find an otter in the city or forest and it looks sick (apathetic, not afraid of people, bleeding), do not touch it! Call the wildlife rescue center (numbers are available on the Internet). If it has a broken leg or is tangled in nets, carefully, in gloves, put it in a box and take it to a veterinarian.

Do not try to warm it up, feed it, treat it yourself. The otter is a stressful animal. It may die of fear. Do not give it to a zoo without permission — it's already crowded there. The best option is a rehabilitation center.

If you find a cub (small, blind) — the mother is nearby. Do not take it. Go away and wait. The mother will come. If the cub cries for more than 2 hours, call specialists.

Conclusion: why otters are needed on the planet

Otters are the top of the food chain in the river. They regulate the population of fish by eating the weak and sick. They do not allow crabs and frogs to breed until epidemics. Thanks to the otter, the river is healthy. If the otter disappears, there will be a imbalance, the river will become sick, overgrown with algae, and become acidic.

Otters are a living indicator of clean water. If there are otters, you can drink the water without fear. If there are none, you should sound the alarm.

World Otter Day is not about a little animal. It's about us. Can we preserve nature so that otters return? So that our children see how she catches fish and plays at sunset? Think about this on May 27. And if you decide — help. At least don't throw garbage. The otter will thank you. Silently, because it can't talk. But you will understand.

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