Apatosaurus
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Apatosaurus
  • Name Meaning: “Deceptive lizard”
  • Habitat: Western North America
  • Length: 75-90 ft23-28m
  • Weight: 20-36 tons20,000-36,000 kg
  • Stance: Quadruped
  • Diet: Ferns and conifer branches
  • Age: Late Jurassic, 150 million years ago

Apatosaurus is one of the largest animals to ever walk the Earth. An average adult is longer than two school buses parked bumper to bumper and weighs as much as four adult male African elephants.

Fossil imagery courtesy of Natural History Museum of Los Angeles County.

Apatosaurus
Apatosaurus Attraction

Did you know?

Apatosaurus can’t chew. It has to swallow all of its plant food whole.

Size Chart

Tyrannosaurus rex 40′ long × 16′ tall12m long × 5m tall Apatosaurus 75′ long × 15′ tall23m long × 5m tall Suchomimus 35′ long × 14′ tall11m long × 4m tall Triceratops 30′ long × 10′ tall9m long × 3m tall Edmontosaurus 35′ long × 10′ tall11m long × 3m tall Gallimimus 26′ long × 9′ tall8m long × 3m tall Stegosaurus 30′ long × 9′ tall9m long × 3m tall Parasaurolophus 40′ long × 9′ tall12m long × 3m tall Baryonyx 30′ long × 8′ tall9m long × 3m tall Metriacanthosaurus 26′ long × 6′ tall8m long × 2m tall Ankylosaurus 30′ long × 6′ tall10m long × 2m tall Velociraptor 15′ long × 6′ tall5m long × 2m tall Pachycephalosaurus 16′ long × 6′ tall5m long × 2m tall Microceratus 2.5′ long × 1′ tall1m long × 0.3m tall Mosasaurus 60′ long 18m long Pteranodon 18′ long6m long Dimorphodon 8′ long3m long Tyrannosaurus rex 40′ long × 16′ tall12m long × 5m tall Apatosaurus 75′ long × 15′ tall23m long × 5m tall Suchomimus 35′ long × 14′ tall11m long × 4m tall Triceratops 30′ long × 10′ tall9m long × 3m tall Edmontosaurus 35′ long × 10′ tall11m long × 3m tall Gallimimus 26′ long × 9′ tall8m long × 3m tall Stegosaurus 30′ long × 9′ tall9m long × 3m tall Parasaurolophus 40′ long × 9′ tall12m long × 3m tall Baryonyx 30′ long × 8′ tall9m long × 3m tall Metriacanthosaurus 26′ long × 6′ tall8m long × 2m tall Ankylosaurus 30′ long × 6′ tall10m long × 2m tall Velociraptor 15′ long × 6′ tall5m long × 2m tall Pachycephalosaurus 16′ long × 6′ tall5m long × 2m tall Microceratus 2.5′ long × 1′ tall1m long × 0.3m tall Mosasaurus 60′ long 18m long Pteranodon 18′ long6m long Dimorphodon 8′ long3m long
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