Nature · Museum-described reconstructed length
How long is a deinonychus antirrhopus?
The Natural History Museum gives Deinonychus a length of 3.4 meters. This feathered restoration compares the complete body and long balancing tail.

≈ 3.4 m
Sourced measurement- Measurement
- Museum length reference · approximately 3.4 meters
- Subject or version
- Museum-described reconstructed length
- Using this value
- A starting value for the illustration, not a universal or confirmed height.
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A little more perspective
The museum’s directory lists 3.4 meters and identifies the species as antirrhopus. This is a reconstructed-size reference, not a direct living-animal measurement. Its long stiff tail contributes substantially to total length.
The museum explains that direct feather evidence has not been found for Deinonychus, although feathers are considered likely from its close relatives. The illustration follows that inference with folded feathered forelimbs. Colors, coverage and feather tips remain interpretive, while the raised second-toe claws stay visible.
Quick facts
The Natural History Museum gives Deinonychus a length of 3.4 meters. This feathered restoration compares the complete body and long balancing tail.
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Sources and measurement notes
The 3.4-meter length includes the tail; feather appearance is inferred.
Source review recorded . Maintained by Ishan Karunaratne. Suggest a correction with a source and the exact measurement being compared.