Fauna
Species

Brontosaurus excelsus

Brontosaurus excelsus

Brontosaurus excelsus roamed the semi-arid floodplains of western North America during the Late Jurassic, using its massive pillar-like legs and robust neck to anchor a browsing lifestyle. High-spined neck vertebrae supported powerful elastic ligaments that allowed energy-efficient sweeps through low ferns, horsetails, and mid-level conifer canopies without moving its immense body. Its extraordinarily long, whiplash tail served both as a counterweight during locomotion and as an acoustic deterrent capable of breaking the sound barrier to deter predators.

PrehistoricHerbivoreSauropod
Brontosaurus excelsus reference
Matthew Bellemare / CC BY-SA 2.0 · cc-by-sa
—observations
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ExtinctConservation statusIUCN Red List categoriesLCNTVUENCREWEXExtinctRed List categories, explained →
Key facts
Diet & preyHerbivore (ferns, cycads, ginkgoes, and conifers)
Predators
  • Allosaurus fragilis
  • Torvosaurus tanneri
  • Ceratosaurus nasicornis
ThreatsCarnivorous theropods and seasonal droughts
HabitatsSemi-arid floodplains, open woodlands, and river valleys
Life span50–100 years
Classification
  1. FamilyDiplodocidae
  2. SpeciesBrontosaurus excelsus
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Extinct species known only from fossils; safe to observe in museum exhibits.
Responsible observation
  • Museum Viewing: Examine mounted skeletons to observe the heavy, downward-canted neck vertebrae.
  • Field Paleontology: Explore public quarries in the Morrison Formation of Wyoming and Utah.
  • Skull Details: Look for cast reconstructions on museum mounts, as true fossil skulls remain exceedingly rare.
Related species
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