This is a vintage-style illustration of a rodent, likely a species of tree mouse or possum. The animal is depicted resting on a thick, brown branch with green leaves sprouting around it. The rodent has a dark, almost black coat of fur, with a lighter, white patch on its chest. Its long, bushy tail curls around the branch, providing balance. The animal's face is pointed with small, dark eyes and visible whiskers. The branch is textured with bark, and the leaves are detailed with veins and varying shades of green. The background is a soft, pale blue, creating a gentle contrast with the animal and branch. The illustration has a scientific or natural history feel, with a label at the bottom reading 'Hapalotis Hirsutus, Brazil'. The style of the illustration is reminiscent of 19th-century natural history plates, with a focus on accurate depiction and detailed rendering of the animal and its environment.