Mammals
Lowland Paca
Cuniculus paca · also called spotted paca
Startled while foraging along a riverbank at night, a lowland paca lets out an alarm call amplified by hollow chambers within its own skull before diving into the water, submerging with only its nostrils exposed until the danger passes.
Overview
The lowland paca, Cuniculus paca, is a stocky, spotted rodent native to rainforest and wetland habitat across a broad range extending from Mexico through Central America and much of South America. Its skull-amplified alarm calls, strong swimming ability used to evade predators, and distinctive spotted camouflage make it one of the more acoustically and behaviourally interesting rodents found anywhere in the Neotropics.
A voice bigger than its body
Few rodents can produce a sound as unexpectedly loud as the lowland paca, its hollow skull chambers turning a simple alarm call into a booming warning that carries far beyond what its stocky frame would suggest.
Status
Least Concern, remaining widespread across suitable rainforest and wetland habitat throughout its broad range, despite ongoing hunting pressure for its meat in parts of its distribution.
Lowland Paca: common questions
How does the lowland paca make such a loud sound for its size?
This species has hollow resonating chambers within its skull that amplify its alarm calls into a surprisingly loud, booming sound relative to its stocky body size, a distinctive acoustic adaptation not shared by most other similarly sized rodents.
How does the lowland paca escape predators?
This species is a capable swimmer and will often flee into water to escape predators, sometimes remaining submerged for extended periods with only its nostrils exposed above the surface, using water as a reliable escape route unavailable to many land-based predators.
Why is the lowland paca hunted?
This species is hunted for its meat across parts of its range, considered a prized food source in many rural communities within its native distribution from Mexico through South America, though this pressure has not yet pushed the species toward significant overall conservation concern.
What does the lowland paca's spotted coat help with?
This species has rows of pale spots running along its reddish-brown coat, a pattern that provides effective camouflage in the dappled light and shadow of its rainforest and wetland habitat, helping it stay hidden while foraging at night.