Hoffmann's Two-toed SlothCholoepus hoffmanniWhere and when to see them

Hoffmann's two-toed sloth is an arboreal mammal of Central America and northwestern South America, including Costa Rica. Its shaggy coat, rounded muzzle and long curved claws suit a life suspended beneath branches. The name refers to the two clawed digits on each forelimb; each hind foot has three. Individuals can remain remarkably inconspicuous in the canopy, and a motionless bundle of fur may be easier to overlook than an active animal.

Size

54-72 cm long

Weight

2.1-9 kg

Lifespan

Not reliably established

Status

Least Concern

Mostly nocturnal and usually solitary, this sloth spends long periods resting among branches before slowly travelling to feeding sites. It hangs using strong curved claws and changes position without the conspicuous leaps of monkeys. Mothers carry dependent young against the body for months. Although movement is generally economical, a frightened animal can defend itself forcefully with claws and teeth, so apparent slowness should never be mistaken for tameness. They possess a remarkable grip strength, allowing them to hang upside down for hours without expending much energy, even while sleeping or giving birth. Despite their arboreal lifestyle, they are surprisingly capable swimmers if they fall into water. Their slow metabolism means they defecate only once a week, typically descending to the ground to do so, a vulnerable but necessary act.

• Both hind feet have three clawed digits despite the common name.
• Its hair parts in a way that helps shed rain while hanging.
• Algae can grow in the coat and contribute a greenish tint.
• Two-toed and three-toed sloths belong to different living families.

Observation is possible year-round in suitable Costa Rican forest. Drier months can make trails and canopy scanning easier on the Pacific side, while Caribbean rainfall patterns differ. There is no dependable seasonal gathering, and individual animals may remain hidden even in occupied habitat. During the nesting season of some bird species, sloths may be easier to spot as they move through the canopy potentially disturbing nests, although this is not a primary observation strategy. Early morning and late afternoon are often the best times for viewing when sloths might be more active in feeding or changing resting spots. Their natural camouflage makes them challenging to spot even in good conditions.

It uses tropical forest across a broad elevation range, including mature woodland, secondary growth and some connected tree cover near settlements. Lowland coastal forests in Costa Rica can be suitable. Canopy continuity matters because movement between isolated trees can expose animals to hazards. While Hoffmann's two-toed sloths primarily inhabit arboreal environments, they are known to descend to the ground to defecate or to move between widely spaced trees, making them vulnerable to predators. They prefer areas with dense canopy cover that provides both protection and a continuous pathway for movement. Their presence can indicate a healthy, connected forest ecosystem.

Leaves form much of the diet, supplemented by shoots, flowers and fruits. A large, compartmentalized stomach supports slow microbial digestion of plant material. Wild food choice varies with available trees, and feeding sloths cultivated fruit can disrupt natural behaviour and nutrition. In addition to leaves, their diet can include buds and twigs, demonstrating adaptability to available plant resources within their home range. The specialized digestive system with a low metabolic rate allows them to subsist on nutrient-poor foliage. Unlike some herbivores, they do not appear to require external water sources, obtaining sufficient hydration from their food.

Common name

Hoffmann's Two-toed Sloth

Scientific name

Choloepus hoffmanni

Animal group

Mammals

Size

54-72 cm long

Weight

2.1-9 kg

Lifespan

Not reliably established

Status

Least Concern

Identification

Two foreclaws, a prominent rounded muzzle and the absence of a dark eye mask distinguish it from Costa Rica's brown-throated three-toed sloth. Adult Hoffmann's two-toed sloths typically weigh between 4 to 8 kilograms and measure around 58 to 70 centimeters in length, making them significantly larger than three-toed sloths. Their fur often has a greenish tinge due to symbiotic algae growing on the hairs, which provides additional camouflage. The two large claws on each forelimb are a definitive feature, distinguishing them from the three smaller claws of their three-toed relatives.