• ✓Front legs longer than hind legs, back sloping down from shoulders to hips
• ✓Very long neck raised at a steep angle
• ✓Small head with a bony arch over the nose
• ✓Pillar-like legs, front feet with a single clawFront-foot claw not clearly visible
• ✕Fairly short tail, held off the groundTail is long and its tip droops almost to the ground
• ✓Whole animal visible in side view
• ✓Scene matches the period and the fossil site
• ✓No text, people or modern objects

Checked by Claude Opus 5.5 (checked item by item from the image) on Oct 28, 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 Brachiosaurus, a herbivore Brachiosauridae dinosaur from the Late Jurassic (about 155–145 million years ago). Front legs longer than the hind legs so the back slopes down from high shoulders to the hips, like a giraffe. A very long neck held raised upward at a steep angle. Reference: Brachiosaurus is a genus of sauropod dinosaur that lived in North America during the Late Jurassic, about 155.6 to 145.5 million years ago. It was first described by American paleontologist Elmer S. Riggs in 1903 from fossils found in the Colorado River valley in western Colorado, United States. Riggs named the dinosaur Brachiosaurus altithorax; the generic name is Greek for "arm lizard", in reference to its proportionately long arms, and the specific name means "deep chest". Brachiosaurus is estimated to have been between 18 and 22 meters long; body mass estimates of the subadult holotype specimen range from 28.3 to 46.9 metric tons. Anatomy: a small head with a bony arch over the nose in front of the eyes; pillar-like legs; front feet are columns with a single thumb claw; a relatively short tail held off the ground. Full body in side view, whole animal visible, standing in a semi-arid Late Jurassic floodplain like the Morrison Formation of western North America, with conifers, cycads, ginkgoes, tree ferns and ferns along a river, no grass and no flowering plants. 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