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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.

Deinonychus antirrhopus, Museum-described reconstructed length. Museum length reference · approximately 3.4 meters: 3.4 meters, illustrative estimate.
Interpretive living-form reconstruction. Horizontal extended snout-to-tail outline represents the selected fossil-based length; soft tissues, colors and fine surface geometry are uncertain.

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.

For a presentation or a research note, include the subject, the measurement definition, and the assumed measurement. A picture alone cannot explain those choices. The comparison guide explains how to export an image and its source notes together.

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.

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