Parasaurolophus Size Comparison
Parasaurolophus 3D Viewer pairs published crested hadrosaur figures with a 1.8 m person on screen - length about 7.5 m to over 9 m (some sources to about 11 m), standing height about 4.4-5.6 m, and weight about 2.6 to more than 5 tonnes - so the scale gap stays readable at a glance.
Parasaurolophus published figures
The Parasaurolophus facts panel and this table disclose the wide cross-source ranges rather than one invented single number; the Size vs human control uses about 9.5 m as the model length ratio:
| Measure | Figure | Vs a 1.8 m person |
|---|---|---|
| Length | about 7.5 m to over 9 m; some sources cite up to about 11 m; Size vs human uses about 9.5 m | ~5.3x a person end-to-end at the 9.5 m scale figure |
| Standing height | about 4.4-5.6 m | ~2.4x to ~3.1x adult standing height |
| Weight | about 2.6 to more than 5 tonnes (low estimates sometimes about 2.7-3.6 t) | no single complete skeleton settles one mass across all three recognized species |
| When it lived | 76.5-73 million years ago | Late Cretaceous (Campanian), western North America; William Parks named the genus in 1922 from a 1920 find near the Red Deer River, Alberta (type specimen ROM 768) |
How the Parasaurolophus size-vs-human toggle stays honest
The Parasaurolophus model is drawn to a fixed on-screen length so it fits the canvas; the Size vs human control then places a 1.8 m person at the true length ratio used by the viewer (about 9.5 m). Tap Size vs human under the canvas to show or hide the scale figure - the comparison is proportional, not a decorative sticker. Published length still spans about 7.5 m to over 9 m (some sources to about 11 m), so the toggle picks one clear scale inside that disclosed range.
What a person would see beside a Parasaurolophus
On Parasaurolophus Size Comparison, What a person would see is a bipedal duck-billed herbivore whose standing height (about 4.4-5.6 m) towers well above a 1.8 m adult, with a long hollow head crest formed by nasal passages. From snout to tail the animal spans roughly several person-lengths at the about 9.5 m scale figure - turn on the person in the viewer and orbit beside a hind leg to feel how the crest and bipedal body sit relative to the scale figure. Skin and crest surface color are an artistic reconstruction, not a fossil-accurate skeleton.
What the Parasaurolophus size numbers are not
What these size numbers are not is a claim of one precise length or weight: the Parasaurolophus size comparison discloses the wide literature range and uses about 9.5 m only for the Size vs human scale; crest function stays debated (resonance, recognition, heat regulation), no free-licensed Parasaurolophus glTF is re-hosted yet so the viewer stays procedural, and this is not a win/lose game. For the control walkthrough see how to view Parasaurolophus in 3D. For trade-offs versus phone AR apps see Parasaurolophus 3D viewer vs AR apps.
Other dinosaurs to compare
Other dinosaurs in the collection make useful size comparisons too: Parasaurolophus is a crested duck-billed herbivore, so for a horned quadruped herbivore see the Triceratops 3D Viewer, or for an armored club-tailed herbivore see the Ankylosaurus 3D Viewer.
Frequently asked questions
Are all Parasaurolophus crests the same shape?
No - three species are recognized, and the crest shape differs between them. P. tubicen carries a long, straight crest; P. cyrtocristatus has a shorter, more rounded one; P. walkeri (the type species) sits between the two. The Parasaurolophus 3D Viewer models a representative long form rather than picking one species to the exclusion of the others.
Can you rotate and zoom the model yourself, or does it just auto-play?
Drag to orbit and use the scroll wheel or a pinch gesture to zoom in the Parasaurolophus 3D Viewer; a separate toggle turns automatic rotation on or off, another toggles idle breathing and leg-sway motion, and a Fullscreen button expands the canvas - all independent of the Size vs human control described above.
What happens if you click directly on the head crest?
The head crest is its own clickable part, separate from the rest of the head. Clicking it surfaces a dedicated fact about the crest itself - the nasal-passage structure and the debated resonance, recognition, and heat-regulation theories - rather than the generic head fact that clicking elsewhere on the skull shows.
Does viewing the Parasaurolophus model send anything to a server?
No - the viewer renders entirely in the browser using WebGL. Rotating, zooming, toggling Size vs human, and clicking parts all happen client-side; nothing about the visit is sent to a server to generate the model or the facts panel.
Will a more detailed 3D model replace the current one?
The viewer supports an optional upgrade: when a free-licensed, higher-fidelity model becomes available for a species, it is cached in the browser and checked against a stored hash before it swaps in over the procedural shape. No such model is published for Parasaurolophus yet, so the viewer stays procedural with no loss of function in the meantime.
Where do these Parasaurolophus size figures come from?
The length, standing-height, and weight ranges are drawn from Wikipedia's synthesis of the published paleontology literature and cross-checked against Dimensions.com's standing-height and low-end weight estimates, rather than a single primary source - which is also why the figures are shown as ranges instead of one invented precise number.
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