Two monsters Hieronymus Bosch (1450-1516)

The image, titled Two Monsters, is a sepia-toned sketch on a light brown background. It depicts two fantastical creatures, possibly birds or insects, rendered in a loose, sketchy style with a quill and ink.
The creature on the left is larger and more central. It appears to be facing forward, with a round, somewhat flattened body and large, spread wings that fan out to the sides. The wings are detailed with feathery lines, and the body is textured with circular patterns and fine lines, giving it a slightly ribbed or scaled appearance. Small, dark dots may represent eyes or nostrils, and thin lines suggest legs or appendages. The overall impression is of a creature poised for flight or perhaps resting in a low stance.
To the right and slightly lower is a second, smaller creature. This one is shown from behind, with its head turned inwards, almost tucked into its body. It has a rounded form with hatched lines indicating texture and volume, suggesting a feathery or fur-like covering. Its wings are also drawn, but they appear to be folded or resting. This creature seems more subdued, perhaps sleeping or injured.
The title Two Monsters and the fantastical nature of the creatures invite interpretation beyond mere representation. The contrast between the poised, larger creature and the seemingly vulnerable smaller one could suggest themes of dominance and submission, protection and vulnerability, or predator and prey. The creatures’ monstrous appearance, with their unusual forms and unsettling details, subverts expectations of natural beauty and could allude to the grotesque, the uncanny, or the wild and untamed aspects of nature or the psyche. The sketchy quality of the drawing adds to the sense of immediacy and dynamism, as if capturing a fleeting moment or an imagined vision. The signature at the bottom left, Gero: boss, indicates the artist.