• ✓Bird posture, perched or standing, legs under the body, wings folded at the sides; not a raptor-like pose with hands held out
• ✓Small pointed teeth in both jaws, not a toothless modern-bird beak
• ✕A primitive Mesozoic bird, not a look-alike of any modern bird (sparrow, pigeon, parrot)Body shape too much like a modern sparrow
• ✕Two small clawed fingers at the front edge of each wingNo clawed fingers visible at the wing edge
• ✓Short tail ending in a pygostyle, short tail feathers, no modern-bird tail fan
• ✓Perching feet, first toe reversed, curved claws
• ✓Fully feathered, wings with long asymmetric flight feathers
• ✓Whole animal visible in side view
• ✓Scene matches the period and the fossil site
• ✓No text, people or modern objects

Checked by Claude (AI) on Nov 2, 2026. The score is the share of checklist items the image gets right; it is not an expert scientific review.

Prompt used to create the image

Scientifically accurate paleoart of Musivavis, a Mesozoic bird (Enantiornithes), a bird-line dinosaur from Aptian times (121.4–113.2 million years ago). A natural bird posture, perched on a branch or standing on the ground with the legs under the body and the wings folded against the sides, NOT a raptor-like dinosaur pose with grasping hands held out in front. A short snout with small, pointed teeth in both jaws, NOT a toothless modern-bird beak. A primitive Mesozoic bird, NOT any modern bird species: NOT a sparrow, pigeon, parrot, crow or hummingbird look-alike. A short tail ending in a pygostyle (a small fused bony plate), NOT a long bony tail, with short tail feathers and NO broad fan-shaped tail like a modern bird. Reference: Musivavis is a genus of euenantiornithean bird from the Early Cretaceous (Aptian) Jiufotang Formation of Liaoning Province, China. The genus contains a single species, Musivavis amabilis, known from a nearly complete, articulated skeleton. Anatomy: small claws on the first and second fingers at the front edge of each wing; perching feet with the first toe reversed to oppose the other three, and strongly curved claws; body fully covered in feathers, wings with long asymmetric flight feathers. Full body in side view, whole animal visible, perched or standing in an Early Cretaceous forest by a lake in northeastern China, like the Jehol Biota of Liaoning and Hebei, with conifers, ginkgoes and ferns, no grass. Natural history museum illustration style, realistic textures and natural daylight, muted natural colors. No text, no labels, no humans, no modern objects.

Facts in the prompt come from Wikipedia (en) and Paleobiology Database