black-footed ferret, Black-footed Ferret: Mustela nigripes Audubon & Bachman, 1851. Other names: American black-footed ferret

Range: The original range of the black-footed weasel occupied the eastern and southern regions of the Rocky Mountains, the territory of the Great Plains from Albert and Saskatchewan, to Texas and Arizona (USA).

The American black-footed ferret has long neck and a slender, sinewy body, with very short legs.

Color: The smooth fur of the black-footed ferret has a yellowish color; there are black spots on its muzzle, the tip of the tail and its legs are also black.

The American [black-footed] ferret is 46 - 60 cm long, including 13 - 15 cm bushy tail. Weight: It weighs 0.7 - 1.1 kg, with males weighing slightly more than females.

Lifespan: Ferrets typically live for about 3 - 4 years in the wild (the oldest lived at least 8 years) and 8 - 9 years in captivity (the oldest individual was at least 11 years old).

Voice: The American black-footed ferret is a very vocal animal. He screams loudly when disturbed, frightened or excited. In such a situation, he lets out several loud cries, interrupted by low hissing notes. Male black-footed ferrets "chuckle" when contacting a female during the rutting season, and the cubs make very quiet squeaky sounds.

Habitat: The American black-footed ferret is commonly found in prairie, low to medium height grassland, forming an association with prairie dogs.

Like other weasels and ferrets, the black-footed ferret easily moves around the territory in search of its prey, climbing through treeless spaces even high into the mountains. Individual individuals were found at an altitude of 3000 m above sea level, and another animal was found drowned in Lake Morena, Colorado [USA], located at an altitude of 3125 m.

The North American Prairie is one of the most endangered ecosystems on earth - perhaps even more endangered than the South American rainforest or the old forests of the American Northwest. The prairie plains of North America began to form about 20 million years ago, but in some areas, up to 99 percent of the prairie has been destroyed in just the past 125 to 150 years.

The area known as the Great Plains was once the largest field on earth and covered most of the continental US along with parts of southern Canada and northern Mexico. The prairie stretched from the Rocky Mountains in an eastward direction for over 800 miles, and extended over 3,000 miles from north to south. The plains were created from sedimentary rocks washed out of the Rocky Mountains over millions of years, which were formed from silt, sand and clay. The Rocky Mountains also blocked the flow of moist air from Pacific Ocean, creating a drier climate on the continent that favored the development of grasses over trees.

Enemies: Habitat loss is the main reason why black-footed ferrets have been on the brink of near extinction and why it remains a major threat to the species today. Conversion of fields and grasslands to agricultural use and a widespread prairie dog eradication program have reduced the black-footed ferret's habitat to less than 2 percent of what it used to be. Remaining habitats are now fragmented, associated with prairie dog colonies, separated by large expanses of cropland and human structures. Diseases including plague (affects both black-footed ferrets and their prey - prairie dogs), as well as poisoning and shooting, also remain potential threats.

The American Black-footed Ferret is commonly found in prairie dog colonies, which make up the absolute majority of their diet. In nature, prairie dogs make up 90% of the black-footed ferret's diet.

The black-footed ferret also eats gophers, other small rodents, American rabbits and birds.

A ferret typically eats over 100 prairie dogs in one year, and on this basis, scientists have calculated that over 250 prairie dogs are needed to support one family of black-footed ferrets for one year.

It has been estimated that about 40 - 60 ha of prairie dog colonies are needed to support a single black ferret. The black-footed ferret usually surveys an area of ​​up to 100 ha during a 3 to 8 day period in winter.

The black-footed ferret is a secretive animal, leading primarily a nocturnal lifestyle. It has well developed external bodies senses: acute hearing, sensitive sense of smell and good vision.

The American black-footed ferret is extremely dependent on the prairie dog. Due to feeding mainly on prairie dogs, the black-footed ferret spends most of its life in its colonies. It spends up to 99% of its time in prairie dog burrows, usually being only a few minutes each day. earth's surface. In burrows he sleeps, gets his food, avoids predators and bad weather, and here he brings out his young. For rest and sleep, the black-footed ferret takes underground hole made by a prairie dog.

Its long, slender body allows it to easily enter burrows to find prey while prairie dogs are sleeping. This reduces the risk of damage to the ferret, as it attacks prey of the same size as itself.

Males are more active than females. The black-footed ferret does not sleep in winter, but the amount of time of activity decreases significantly, as does the area of ​​the surveyed territory. In winter, in the cold snowy weather the black-footed ferret can remain dormant for long periods, up to 6 nights and days, remaining in a burrow in which it subsists on previously stored food.

When the black-footed ferret travels across the surface of the earth, it moves in a series of leaps or a slow gallop. He can normally move at a speed of 8 - 11 km / h. Biologists tracked a black-footed ferret that traveled 10 km in one night, during which time it examined more than 100 prairie dog holes. The distance covered by males is almost twice that of females.

social structure: The black-footed ferret leads a solitary life, except for the mating season, and at the same time, males apparently do not help raise and feed the young.

The black-footed ferret uses scent marks to communicate with its compatriots, using the secretion of the anal glands for this purpose. It marks its territory by applying the odorous secretion of the gland to rocks, soil and vegetation.

The population of black-footed ferrets consists of approximately 67% of young animals, and 33% are adults.

A study of the wild population has shown that the average ferret density in favorable habitats is approximately 1 animal per 50 ha of prairie dog colonies. The average distance between two prairie dog towns occupied by the black-footed ferret was 5.4 km. Adult ferrets occupy an area with a diameter of approximately 1 - 2 km.

Reproduction: The young emerge from the burrow in July. In late summer, females increasingly leave their offspring alone in the burrow during the day, and gather them together at night to hunt together. Young ferrets begin to hunt on their own only from September or October, when they leave their mother and become independent and solitary.

Young males settle over greater distances, generally up to 10 - 15 km, while young females often remain close to the mother's territory.

Season/Breeding Period: Mating usually takes place in March and April.

Puberty: Both males and females become sexually mature in the first year of life. The peak reproductive period for males and females is around three to four years of age.

Pregnancy: 41 - 45 days (about 7 weeks)

Offspring: the female brings an average of 3 - 4 young, sometimes in a litter with artificial maintenance, there are up to 9-10 puppies. In nature, litter size in South Dakota averaged 3.5 (varied: 1 - 5); in Wyoming averaged 3.3 babies.

The black-footed ferret is a naturally effective prairie dog population regulator.

The black-footed ferret is listed in Appendix of the Sites Convention as a species endangered and in Appendix II of the Convention on International Trade(list of species prohibited from commercial trade).

Antipathy towards prairie dogs is pronounced among some populations, including ranchers and many workers. Agriculture. Therefore, from the 1920s to the 1960s, the US government sponsored intensive programs to eradicate the prairie dog from the Great Plains states using poison and plowing prairie dog settlements (in order to prevent damage to agriculture and occupation). cattle animal husbandry). For example, the area occupied by prairie dog cities in Kansas was reduced by 98.6%, the black-footed ferret was apparently an unintentional victim of the prairie dog eradication campaign. Even in the 1990s, federal agencies authorized and subsidized the annual eradication of 80,000 hectares of prairie dog colonies.

Thus, the black-footed ferret experienced a dramatic decline in numbers during the first half of the 20th century. She hasn't dated since 1937. In the late 1970s, he was thought to have disappeared from both countries. However, in 1981, a black-footed ferret colony was found in Wyoming, USA.

The first group of captured ferrets all died because a number of them were infected in nature with the causative agent of rabies. This led to the discovery that canine rabies was responsible for the rapid decline in the ferret population in Meeteetse. At this point, all 18 remaining ferrets were captured, vaccinated, quarantined, and sent to a breeding center. As a result of the black-footed ferret breeding program, by 1991 the captive population increased to 311 animals and 49 animals were released back into the wild. They now live in seven sites where the species has been reintroduced, including sites in Montana, Wyoming, Arizona, South Dakota and along the Colorado-Utah border, as well as in Chihuahua, Mexico.

In 1998, the number of offspring of the black-footed ferret, bred in six zoos and one government breeding center for this species, gave results that surpassed all previous ones with a total of 425 born of which 321 survived to the age of the end of mother's milk feeding.

Status and Trends: 1960s - 1994: endangered species; 1996 - 2004: extinct in nature (IUCN 2004). Currently, the black-footed ferret is found in Canada and the United States.

Population Estimates: 1920s: There may have been approximately 800,000 individuals. 1984 - 128 individuals, in 1996 and it now manages 240 (90 males and females), 2005 - about 500 individuals. There are currently approximately 1,000 black-footed ferrets in captivity.

The American, or otherwise it is called the black-footed ferret, belongs to the predatory representatives of the weasel family. One of the features in which he differs from his other ferret relatives is his short body length and low weight. That is, with a weight of one kilogram, or even less, this individual rarely exceeds 45 cm in length.

Appearance description

The coat color is usually yellow-brown and darker on the back, while the tip of the tail and paws are black. Interesting fact that by 1937 of the last century, this subspecies of ferrets was almost completely destroyed in Canada. But, starting from 1980, its numbers began to be gradually restored by artificial breeding. After that, bred in specially created conditions, individuals were gradually returned to their former habitat. Despite the fact that today the number of trochees has increased significantly, since 1967 it has continued to be listed in the Red Book of North America as an endangered species.

Habitat

The homeland of the American ferret is North America, where they live on the great plains. The ferret is awake and hunts only in the dark. But, the lack of light does not prevent him from getting his own food, because the ferrets have well-developed organs of hearing and smell. And the miniature size helps to easily penetrate even the narrowest holes to catch small rodents. But ferrets sleep in a “dead” sleep in order to recover from the excitement and stress that the animal usually experiences during the hunt. This is where the expression “sleep like a ferret” came from. Besides, interesting feature American ferrets is that after penetrating into the hole to their prey and catching it, the first ones leave this hole behind them for permanent or temporary residence.

Females are less active than males. And in winter, their activity is completely reduced, compared with summer period. They begin to hunt less due to the difficulty of moving through the snow cover, and more often prefer to remain in burrows, feeding exclusively on their reserves.

Ferrets are loners. They lead an isolated way of life, they practically do not contact their relatives, except, probably, only for the “marriage” period.

What do they eat

Typically, on average, a ferret consumes 50 to 70 grams of meat per day. At the same time, most often the diet of American ferrets is made up of rodents, less often - small birds and insects. But their main delicacy is ground squirrels, or as they are called in those parts - steppe dogs. To get enough, one ferret needs to eat about 250 ground squirrels a year. The very same typical colony of prairie dogs lives on an area equal to about 50 hectares of steppe terrain.

In the middle of the last century, mass poisoning and extermination of dogs began in the United States in connection with the development of land by local farmers. Which was the main reason for the active extinction of ferrets. After all, the latter were actually left without food.

Conditions of life and reproduction

In early spring, individuals of this species, as a rule, begin the breeding season. After that, after about 1.5 months, cubs are born, the number of which rarely exceeds 5 pieces. This feature is unique to American ferrets, in contrast to their forest and steppe relatives, whose litter can exceed 8 puppies.

IN wild nature animals do not live long - up to about 4 years. What can not be said about their relatives raised in captivity - their life expectancy can reach as much as 9 years. Whereas they reach puberty by the age of one year.

Appearance

The American ferret, like most of the weasel family, has an elongated body on thin, short legs, and an elongated muzzle. And a 15 cm fluffy tail. They have an intricate color: yellowish-brown at the ends, closer to the roots it becomes white, and the paws and the tip of the tail are black. Also, black fur frames the eyes, resembling “glasses”, which act as an additional disguise. Males are larger than females. Like skunks, ferrets are capable of emitting a foul odor to protect themselves, though it is not as strong as a skunk's.

Measures for protection and reproduction

Helping the black-footed ferret not to disappear from the face of the earth Federal and state agencies of the USA together with private farmers. They carry out all possible actions for their breeding and introduction into the wild.

This set of activities began to be carried out in the 80s of the last century, with the advent of the threat of the complete disappearance of American ferrets in nature. It was then that zoologists decided to increase their population by breeding in captivity and further accustoming them to life in vivo, and after that - returning them back to the wild. This experiment paid off, and by 2007 the number of individuals exceeded 600 units, while only 18 units of animals of different sexes were taken for their breeding in the conditions of the scientific and zoological center. As of 2013, approximately 1,200 individuals are known to have lived in the wild. But still still this species remains listed in the Red Book. Therefore, to this day, work is underway to further increase the number of ferrets, until such time as they can independently exist and survive in the wild.

For the people themselves, in this case farmers, ferrets are beneficial by eating harmful prairie dogs, thereby helping to control their population. The latter are especially dangerous for livestock because they are carriers of various infections, one of which is bubonic plague. So the harm a large number of burrows and tunnel systems owned by ferrets and dogs often cause injuries to livestock that occasionally fall into them.

The black-footed ferret is a small North American predator of the weasel family. American black-footed ferrets are also called black-footed ferrets. The name comes from the English "blackfooted ferret". I must say that this animal is one of the most rare mammals North America. IN modern time American black-footed ferrets are unfortunately critically endangered. The number of American ferrets is extremely small. This is due to the human development of those places where the ferrets lived, as well as the fight against prairie dogs, which are the basis of the nutrition of polecats.

The features of the black-footed ferret include a long neck, a very squat, elongated body with very short legs. Its weight is over 1 kg. The black-footed ferret is so similar to the steppe ferret that it is possibly only a subspecies of it.

American black-footed ferrets are nocturnal. These animals have excellent sense of smell, hearing and vision. As already mentioned, American ferrets are extremely dependent on prairie dogs. Ferrets occupy their homes and also feed on these animals. The hole of a prairie dog, which is then occupied by a ferret, can reach a length of up to 300 m.

It should be noted that males lead more active image life than females. However, during cold weather, the activity of ferrets is much reduced, and the area of ​​\u200b\u200bthe area they survey is also reduced. On snowy days, the American ferret does not leave its shelter at all and feeds exclusively on its own supplies.

American ferrets move in jumps or a slow gallop. In one night, a ferret can walk or gallop up to 10 km and reach speeds of up to 11 km/h. Males move around the area almost 2 times more than females.

The color of the black-footed ferret

American ferrets have white fur at the base. At the ends of the hairline, their fur is somewhat darker. Thus, the overall color of the ferret gives a yellowish brown color. The legs and tip of the tail are black. The American ferret, like its brethren, has a characteristic mask " black face". This color scheme helps American ferrets to be invisible and hide from danger.

Distribution area and habitat

Black-footed ferrets live in North America. It is worth recalling that now these hori are an endangered species. They are listed in the International Red Book. Basically, these animals live in the prairies (with low and medium height grass cover). In addition, the ferret can climb high into the mountains, up to 3000 m above sea level.

Hunting and the black-footed ferret

Most ferrets can be found in the habitats of prairie dogs. As mentioned earlier, it is prairie dogs that are the main part of the diet of black-footed ferrets. However, American ferrets also prey on rabbits, ground squirrels and birds.

Enemies of the black-footed ferret

The main reason for the extinction of black-footed ferrets is habitat loss. The processing of fields and meadows, as well as a widespread prairie dog eradication program, have significantly reduced the area where American ferrets live. The rest of the habitats given time associated with prairie dog colonies.

The black-footed ferret eats over 100 prairie dogs in about one year. Based on this data, the scientists found that it takes over 250 prairie dogs to support one family of ferrets for a year.