Apa Itu Sloth Bear

Apa Itu Sloth Bear

Status and conservation

IUCN estimates that fewer than 20,000 sloth bears survive in the wilds of the Indian subcontinent and Sri Lanka. The sloth bear is listed in Schedule I of the Indian Wildlife Protection Act, 1972, which provides for their legal protection. Commercial international trade of the sloth bear (including parts and derivatives) is prohibited as it is listed in Appendix I of the Convention on International Trade in Endangered Species.[1]

To address the human-bear conflict, people may be educated about the conservation ethics, particularly among locals. To resolve this conflict, the basic issue of deteriorating habitat, which is the reason for the conflict between people and bears, improvements through government or community-based reforestation programmes, may be promoted.[1]

The population of sloth bears grows when they live in high-profile reserves that protect species, such as tigers and elephants. Directly managed reserves could conserve the sloth bear, hence such reserves must be supported.[52] Managing garbage, especially hotel waste with foods, is essential in situations where sloth bears get used to entering towns with an increase in the number of accidental attacks on humans.[38]

The government of India has banned use of sloth bears for entertainment, and a 'Sloth Bear Welfare Project' in the country has the objective of putting an end to their use for entertainment. However, their number in such activity is still large. Many organisations are helping in the conservation and preservation of sloth bears in safe places. Sloth bears previously used for entertainment are being rehabilitated in facilities like Agra Bear Rescue Facility run by Wildlife SOS and others.[53] Major sloth bear sanctuaries in India include the Daroji bear sanctuary, Karnataka.[54]

Sloth bears have also been found dead in traps, electrocuted, or killed by other means by poachers, with body parts (i.e. canines, claws, gall bladder, paws, etc) usually removed for the illegal wildlife trade.[55]

Are sloth bears related to sloths?

Contrary to their name, sloth bears and sloths are not closely related, and both belong to entirely different taxonomic orders and families with unique evolutionary histories. For example, sloth bears belong to the order Carnivora, which includes mammals such as dogs, cats, seals, and bears. Within this order, they are also under Ursidae or Bear family.

The name “sloth bear” comes from the bear’s slow-moving behavior and long claws, like a sloth, which led early zoologists and taxonomists to draw parallels between them. However, this similarity is due to convergent evolution, where unrelated species independently develop similar traits in response to similar environments.

Despite these surface resemblances, sloth bears and sloths are genetically and taxonomically distant as well as having strikingly different evolutionary paths.

Sloths, unlike sloth bears, belong to the order Pilosa, sharing it with anteaters and armadillos. Over millions of years, sloths have adapted to a slow-paced arboreal lifestyle, developing features like long arms, curved claws, and a slow metabolism to thrive in treetop habitats where they perform various activities, including eating, sleeping, mating, and giving birth.

Sloth bears….and sloths and bears

Sloth bears got their name in 1791 by English zoologist George Shaw, who encountered the bear and believed the species was related to actual sloths since they shared similar traits, naming them “bear sloths”. Shaw named them Bradypus ursinus, which means something like ‘slow feet bear,’ using the family name of three-fingered sloths, the Genus Bradypus.

The sloth bear goes by many different names throughout the region depending on the language, and once Europeans got involved, the name changed once again. Confusion over whether the bear is a bear or a sloth made it challenging for scientists to classify it under the Latin-based binomial naming system. Once it was indeed determined that it was a bear, they changed the Genus but kept the common name, so “bear sloth” changed to “sloth bear.”

The modern scientific name of the sloth bear, Melursus ursinus, combines Greek and Latin elements. “Melursus” is derived from the Greek “melas” (meaning “black”) and the Latin “ursus” (meaning “bear”), referring to the bear’s dark fur. The specific name “ursinus,” from Latin, translates to “bear-like.”

To add more confusion to the subject, the most common name for sloths in Latin America is ‘oso perezoso’, which means, as you might guess, sloth bear.

How Slothy are Sloth Bears?

Sloth bears adapt their sleep cycle to their environment, which may be a nocturnal, diurnal, or crepuscular schedule depending on other bears, people, or predators in their habitat. Sloth bears may forage for food at night and sleep during the day to avoid potential conflicts with humans. They typically sleep 10 to 14 hours a day and do not hibernate.

Sloths, contrary to popular belief, do not sleep more than the average 10 to 12 hours, and from our last published research, we know that their activity varies depending on the individual and even differs across the same population; some sloths are more diurnal, others nocturnal.

Relationships with humans

Sloth bears are one of the most aggressive extant bears and, due to large human populations often closely surrounding reserves that hold bears, aggressive encounters and attacks are relatively frequent, though in some places, attacks appear to be a reaction to encountering people accidentally.[38] In absolute numbers, this is the species of bear that most regularly attacks humans. Only the Himalayan black bear subspecies of Asian black bear is nearly as dangerous.[56][57] Sloth bears likely view humans as potential predators, as their reactions to them (roaring, followed by retreat or charging) are similar to those evoked in the presence of tigers and leopards.[11] Their long claws, which are ideally adapted for digging at termite mounds, make adults less capable of climbing trees to escape danger, as are other bears such as Asian black bears. Therefore, sloth bears have seemingly evolved to deal with threats by behaving aggressively. For the same reason, brown bears can be similarly inclined, accounting for the relatively high incidence of seemingly non-predatory aggression towards humans in these two bear species.[58]

According to Robert Armitage Sterndale, in his Mammalia of India (1884, p. 62):

[The sloth bear] is also more inclined to attack man unprovoked than almost any other animal, and casualties inflicted by it are unfortunately very common, the victim being often terribly disfigured even if not killed, as the bear strikes at the head and face. [William Thomas] Blanford was inclined to consider bears more dangerous than tigers...

Captain Williamson in his Oriental Field Sports wrote of how sloth bears rarely killed their human victims outright, but would suck and chew on their limbs till they were reduced to bloody pulps.[2] One specimen, known as the sloth bear of Mysore, was responsible for the deaths of 12 people and the mutilation of 24 others. It was shot by Kenneth Anderson.[59] Although sloth bears have attacked humans, they rarely become man-eaters. Dunbar-Brander's Wild Animals of Central India mentions a case in which a sow with two cubs began a six-week reign of terror in Chanda, a district of the Central Provinces, during which more than one of their victims had been eaten,[60] while the sloth bear of Mysore partially ate at least three of its victims.[59] R.G. Burton deduced from comparing statistics that sloth bears killed more people than Asian black bears,[60] and Theodore Roosevelt considered them to be more dangerous than American black bears.[61] Unlike some other bear species, which at times make mock charges at humans when surprised or frightened without making physical contact, sloth bears frequently appear to initiate a physical attack almost immediately. When people living near an aggressive population of sloth bears were armed with rifles, it was found that it was an ineffective form of defense, since the bear apparently charges and knocks the victim back (often knocking the rifle away) before the human has the chance to defend themself.[62][63] In Madhya Pradesh, sloth bear attacks accounted for the deaths of 48 people and the injuring of 686 others between 1989 and 1994, probably due in part to the density of population and competition for food sources.[64] A total of 137 attacks (resulting in 11 deaths) occurred between April 1998 and December 2000 in the North Bilaspur Forest Division of Chhattisgarh. The majority of attacks were perpetrated by single bears, and occurred in kitchen gardens, crop fields, and in adjoining forests during the monsoon season.[65] One Mr. Watts Jones wrote a first-hand account of how it feels to be attacked by a sloth bear, recalling when he failed to score a direct hit against a bear he had targeted:

I do not know exactly what happened next, neither does my hunter who was with me; but I believe, from the marks in the snow, that in his rush the bear knocked me over backwards in fact, knocked me three or four feet away. When next I remember anything, the bear's weight was on me, and he was biting my leg. He bit two or three times. I felt the flesh crush, but I felt no pain at all. It was rather like having a tooth out with gas. I felt no particular terror, though I thought the bear had got me; but in a hazy sort of way I wondered when he would kill me, and thought what a fool I was to get killed by a stupid beast like a bear. The shikari then very pluckily came up and fired a shot into the bear, and he left me. I felt the weight lift off me, and got up. I did not think I was much hurt. ... The main wound was a flap of flesh torn out of the inside of my left thigh and left hanging. It was fairly deep, and I could see all the muscles working underneath when I lifted it up to clean the wound."[66]

In 2016, according to a forest official, a female bear had killed three people, and hurt five others in Gujarat State's Banaskantha district, near Balaram Ambaji Wildlife Sanctuary, with some of the casualties being colleagues. At first, an attempt was made to trace and cage it, but this failed, costing the life of one official, and so a team of both officials and policemen shot the bear.[9]

In Karnataka's Bellary district, most of the attacks by sloth bears occurred outside forests, when they entered settlements and farmlands in search of food and water.[67]

In Mount Abu town in southern Rajasthan, sloth bears attacked people inside towns where they were seeking hotel waste in rubbish bins and encountered people by chance.[38] Though such attacks were concomitant with increasing tourism activity, quite remarkably, local residents have not retaliated against the sloth bears. The absence of retaliation in many locations of India appears related to cultural norms and the dominant religion Hinduism where nature and animals are worshipped as deities.

One method of hunting sloth bears involved the use of beaters, in which case, a hunter waiting on a post could either shoot the approaching bear through the shoulder or on the white chest mark if it was moving directly to him. Sloth bears are very resistant to body shots, and can charge hunters if wounded, though someone of steady nerves could score a direct hit from within a few paces of a charging bear. Sloth bears were easy to track during the wet season, as their clear footprints could be followed straight to their lairs. The majority of sloth bears killed in forests were due to chance encounters with them during hunts for other game. In hilly or mountainous regions, two methods were used to hunt them there. One was to lie in wait above the bear's lair at dawn and wait for the bear to return from its nocturnal foraging. Another was to rouse them at daytime by firing flares into the cave to draw them out.[68] Sloth bears were also occasionally speared on horseback.[7] In Sri Lanka, the baculum of a sloth bear was once used as a charm against barrenness.[29]

Officers in British India often kept sloth bears as pets.[35] The wife of Kenneth Anderson kept an orphaned sloth bear cub from Mysore, which she named "Bruno". The bear was fed all sorts of things and was very affectionate toward people. It was even taught numerous tricks, such as cradling a woodblock like a baby or pointing a bamboo stick like a gun.[1]

Dancing bears were historically a popular entertainment in India, dating back to the 13th century and the pre-Mughal era. The Kalandars, who practised the tradition of capturing sloth bears for entertainment purposes, were often employed in the courts of Mughal emperors to stage spectacles involving trained bears.[35] They were once common in the towns of Calcutta, where they often disturbed the horses of British officers.[35]

Despite a ban on the practice that was enacted in 1972, as many as 800 dancing bears were in the streets of India during the latter part of the 20th century, particularly on the highway between Delhi, Agra, and Jaipur. Sloth bear cubs, which were usually purchased at the age of six months from traders and poachers, were trained to dance and follow commands through coercive stimuli and starvation. Males were castrated at an early age, and their teeth were knocked out at the age of one year to prevent them from seriously injuring their handlers. The bears were typically fitted with a nose ring attached to a four-foot leash. Some were found to be blind from malnutrition.[69]

In 2009, following a seven-year campaign by a coalition of Indian and international animal welfare groups, the last Kalandar dancing bear was set free.[70] The effort to end the practice involved helping the bear handlers find jobs and education, which enabled them to reduce their reliance on dancing-bear income.[71]

Charles Catton included the bear in his 1788 book Animals Drawn from Nature and Engraved in Aqua-tinta, describing it as an "animal of the bear-kind" and saying it was properly called the "Petre Bear".[72]

In Rudyard Kipling's The Jungle Book, Baloo "the sleepy old brown bear" teaches the Law of the Jungle to the wolf cubs of the Seeonee wolf pack, as well as to his most challenging pupil, the "man-cub" Mowgli. Robert Armitage Sterndale, from whom Kipling derived most of his knowledge of Indian fauna, used the Hindustani word bhalu for several bear species, though Daniel Karlin, who edited the Penguin Classics reissue of The Jungle Book in 1989, stated, with the exception of colour, Kipling's descriptions of Baloo are consistent with the sloth bear, as brown bears and Asian black bears do not occur in the Seoni area where the novel takes place. Also, the name "sloth" can be used in the context of sleepiness. Karlin states, however, that Baloo's diet of ".. only roots and nuts and honey" is a trait more common to the Asian black bear than to the sloth bear.[73]

). An ecological investigation on the dietary composition and habitat utilization of sloth bear (

) at Mudumalai wildlife sanctuary, Tamil Nadu (South India). MPhil thesis, A.V.C. College, Mannambandal, Tamil Nadu, India.

Where do Sloth Bears Live?

Sloth Bears thrive in the Indian subcontinent’s diverse environments like dry forests, grasslands, wet forests, and mountains. They favor rocky outcrops and caves for daytime shelter. The tropical climate in these regions is marked by high temperatures and substantial rainfall, fostering a biodiverse environment.

Sloths, on the other hand, are found in the rainforests of Central and South America. Preferring a life high up in the trees where they hang using their strong claws. Sloths consider the forest canopy their primary home. They flourish in humid environments and rely on a diverse array of leaves as their main source of food.

Surprisingly, both sloth bears and sloths typically lead solitary lives. Sloth bears may be spotted in groups during times of abundant resources, and occasionally, groups of female sloths share the same tree.

Behaviour and ecology

Adult sloth bears may travel in pairs. Males are often observed to be gentle with cubs. They may fight for food. They walk in a slow, shambling motion, with their feet being set down in a noisy, flapping motion. They are capable of galloping faster than running humans.[31] Although they appear slow and clumsy, both young and adult sloth bears are excellent climbers.[32] They occasionally will climb to feed and to rest, though not to escape enemies, as they prefer to stand their ground. Sloth bear mothers carry their cubs up trees as the primary defense against attacks by predators instead of sending them up trees. The cubs can be threatened by predators such as tigers, leopards, and other bears.[33] They are adequate climbers on more accessible trees but cannot climb as quickly or on as varied surfaces as can black bears due to the sloth species' more elongated claw structure. Given their smaller size and still shorter claws, sloth bear cubs probably climb more proficiently than adults (much as brown bear cubs can climb well but not adults).[24] They are good swimmers, and primarily enter water to play.[24]

To mark their territories, sloth bears scrape trees with their forepaws, and rub against them with their flanks.[31] Sloth bears are recorded to produce several sounds and vocals. Howls, squeals, screams, barks and trumpet-like calls are made during aggressive encounters while huffing is made as a warning signal. Chuffing calls are made when disturbed. Females keep in contact with their cubs with a grunt-whicker while cubs yelp when separated.[34]

The breeding season for sloth bears varies according to location: in India, they mate in April, May, and June, and give birth in December and early January, while in Sri Lanka, it occurs all year. Sows gestate for 210 days, and typically give birth in caves or in shelters under boulders. Litters usually consist of one or two cubs, or rarely three.[31] Cubs are born blind, and open their eyes after four weeks.[35] Sloth bear cubs develop quickly compared to most other bear species: they start walking a month after birth, become independent at 24–36 months, and become sexually mature at the age of three years. Young cubs ride on their mother's back when she walks, runs, or climbs trees until they reach a third of her size. Individual riding positions are maintained by cubs through fighting. Intervals between litters can last two to three years.[31]

Sloth bears are expert hunters of termites, ants, and bees, which they locate by smell.[31][36] On arriving at a mound, they scrape at the structure with their claws until they reach the large combs at the bottom of the galleries, and disperse the soil with violent puffs. The termites are then sucked up through the muzzle, producing a sucking sound which can be heard 180 m away.[35] Their sense of smell is strong enough to detect grubs 3 ft below ground. Unlike other bears, they do not congregate in feeding groups.[31] Sloth bears may supplement their diets with fruit, plant matter, carrion, and very rarely other mammals. In March and April, they eat the fallen petals of mowha trees and are partial to mangoes, maize, sugar cane, jackfruit, and the pods of the golden shower tree.[36] Sloth bears are extremely fond of honey.[35] When feeding their cubs, sows are reported to regurgitate a mixture of half-digested jack fruit, wood apples, and pieces of honeycomb. This sticky substance hardens into a dark yellow, circular, bread-like mass which is fed to the cubs. This "bear's bread" is considered a delicacy by some of India's natives.[37] Rarely, Sloth bears can become addicted to sweets in hotel waste, visiting rubbish bins, even inside populated towns, all year long.[38] Their diet includes animal flesh.[39]

In Neyyar Wildlife Sanctuary, Kerala, seeds of six tree species eaten and excreted by sloth bears (Artocarpus hirsuta, A. integrifolia, Cassia fistula, Mangifera indica, Zizyphus oenoplina) did not see significantly different percentages of germination (appearance of cotyledon) when compared to germinated seeds that had not been passed through the gut of the bears.[40] However, seeds germinated much faster after being ingested by bears for three species, Artocarpus hirsuta, Cassia fistula, and Zizyphus oenoplina. This experiment suggests that sloth bears may play an important role in seed dispersal and germination, with effects varying by tree species.[40]

Challenges and threats

Both sloth bears and sloths have their own unique set of challenges in the wild. Sloth bears, for example, face deforestation and habitat loss. Forests are cleared for agriculture and urban settlements, resulting in sloth bears losing their home and food sources. Poachers are also an issue since sloth bears’ claws and gallbladders are sold illegally in the wildlife trade business since they are highly valued for medicine and ornamental purposes.

Sloths, both two-fingered and three-fingered, face similar challenges. In the tropical rainforests of Central and South America, rainforests are cut down for logging and converted into farmland and pastures; sloths lose both their homes and food supplies.

Both sloth bears and sloths are grappling with the impacts of human activities that threaten their survival. While each species faces unique challenges based on where and how they live, there is a common thread: most of the hurdles they encounter in the wild can be traced back to human actions.

Finally, sloth bears! We seized the opportunity to compare sloths and sloth bears to clarify the confusion surrounding their common names and delve into their lifestyles, the threats they face, and ways we can help in their conservation!

What do sloth bears eat?

Despite being in the order Carnivora, sloth bears are myrmecophagous, meaning they consume termites and ants. Occasionally, during monsoon season, they are known to dine on fruit in trees such as mango, fig, ebony, etc., as well as flowers. Termites, ants, beetles, and other insects are also of interest to sloth bears year-round, and they are 95% of their diet.

Aside from digging out mounds, they are capable climbers and can climb trees to knock down honeycombs to collect the honey from the ground.

Scientists study sloth bears around India through GPS collars that communicate through satellites and allow them to collect data from the exact location of the animals at any given time. Scientists have studied and collected data on sloth bear attacks, threats to sloth bears, sloth bear denning, relocation of sloth bears, and sloth bear densities. The sloth bear is the least studied and understood bear in the Indian subcontinent.

Here at SloCo, we similarly study sloths through VHF/GPS collars, backpacks, and data loggers. VHF and GPS collars allow scientists to locate sloths and collect information about the sloth and its habitat.

The overall goal of scientists studying sloths is the same for sloth bears: to ensure long-term survival, conservation, and coexistence.

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