Dinosaur with longest neck relative to body size

Relative to body size, the dinosaur with the longest neck was Omeisaurus tianfuensis, a giraffe-like plant-eating sauropod dinosaur that lived in China 160–164 million years ago during the Middle Jurassic Period. Measuring approximately 9.1 m long, its disproportionately lengthy neck (containing 17 very elongated bones) was four times longer than its entire body length. By comparison, a modern-day giraffe's neck contains only seven bones and is only twice as long as its entire body length.