Acouchy

What is an acouchy and how is it classified within the rodent family?

An acouchy is a small, South American rodent belonging to the genus Myoprocta. These animals are known for their slender legs, hooflike claws, and a distinctive, pencil-thin tail. They inhabit mature tropical-rainforest environments, where they are primarily terrestrial and active during the day.¹

Regarding their classification, acouchys are closely related to agoutis. Both are members of the family Dasyproctidae, which falls under the rodent suborder Hystricognatha. While some experts place them in the family Dasyproctidae, others categorize them within a subfamily (Dasyproctinae) of the Agoutidae family.¹

What are the main differences between acouchies and agoutis?

While acouchies and agoutis are closely related members of the family Dasyproctidae, they exhibit distinct physical and behavioral differences.

Physical Characteristics

• Size: Acouchies are generally smaller, weighing between 1 and 1.5 kg (2.2 to 3.3 pounds) with a body length of 30 to 39 cm. Agoutis are typically larger and more robust.
• Tail: A defining feature of the acouchy is its very short, pencil-thin tail (4 to 8 cm) that features white hairs on the underside and a tufted tip.
• Appearance: Acouchies are often compared to small, hoofed forest animals like chevrotains or royal antelopes due to their slender legs and hooflike claws.

Behavioral Differences

• Escape Behavior: When alarmed, acouchies emit birdlike whistles and often move by jumping with both hind feet simultaneously, a behavior similar to that of small African duikers.
• Shelter: Unlike some other rodents that dig their own burrows, acouchies do not construct their own shelters; instead, they utilize existing cavities, such as abandoned armadillo burrows, or rest in leaf nests within hollow logs.

What are the physical characteristics and size of an acouchy?

Acouchys are small rodents characterized by their slender, deer-like appearance, which draws comparisons to small hoofed animals like chevrotains and royal antelopes.

Physical Characteristics and Size

• Dimensions: These animals typically weigh between 1 and 1.5 kg (2.2 to 3.3 pounds) and measure 30 to 39 cm (12 to 15 inches) in length.¹
• Tail: They possess a very short, pencil-thin tail measuring 4 to 8 cm, which is distinguished by white hairs on the underside and a tufted tip.¹
• Limbs: Acouchys have long, slender legs and three-toed hind feet that terminate in hooflike claws.¹
• Coat:
  • The red acouchy (Myoprocta acouchy) features coarse, dark chestnut red or orange fur on its sides and legs, with a black or dark red rump.¹
  • The green acouchy (M. pratti) has grizzled fur, with individual hairs featuring alternating black and yellow bands, resulting in an olive or green appearance.¹

Where are acouchies primarily found in the wild?

Acouchies are primarily found in the mature tropical-lowland rainforests of the Amazon River basin. Their geographic range spans across several South American countries, including:¹

• Colombia
• Ecuador
• Peru
• Western and northern Brazil
• The Guianas¹

These terrestrial rodents are typically solitary and spend their time on the forest floor, where they forage for fruit, seeds, and seedlings.¹