Black mamba
#1 · Dendroaspis polylepis · travel
Snakes
Tingle's 2020 table reprints Secor, Jayne and Bennett 1992: a sidewinder burst of 2.3 mph (3.7 km/h) on a rubber mat. Mosauer's 2.1 mph (3.3 km/h) on sand does not count.
A sidewinder can travel 2.3 mph (3.7 km/h), a verified measurement.
Top speed
Published as 3.7 km/hPublished as 3.7 km/hPublished as 3.7 km/h
Jessica L. Tingle 2020, Table 3, cell for Crotalus cerastes: 2.3 mph (3.7 km/h), burst speed trials on a track with rubber matting at 30 C, Secor et al. 1992, several individuals, two trials each. The figure is that 2.3 mph (3.7 km/h). Mosauer 1935's 2.1 mph (3.3 km/h) on sand is the other controlled cell and is not a separate record.
In context
Worked out from the sourced figure above, which stays the ranked number.
Quick answers
A sidewinder can travel 2.3 mph (3.7 km/h), a verified measurement.
Sidewinder is labeled Verified. Independently measured and published, for example in a peer-reviewed study or with certified timing.
The figure cites Integrative and Comparative Biology, “Facultatively sidewinding snakes, Table 3, 3.7 km/h.”
Sidewinder is 4th of 7 on Fastest Snakes.
Mechanism
Tingle's 2020 table reprints Secor, Jayne and Bennett 1992: a sidewinder, Crotalus cerastes, burst of about 2.3 mph (3.7 km/h) on a rubber mat at 30°C. Mosauer's 2.1 mph (3.3 km/h) on sand does not count.
A sidewinder throws a loop of the body and sets it down, which is how it moves on sand. The ranked 2.3 mph (3.7 km/h) was on a rubber mat at 30°C, not on sand. Mosauer's 2.1 mph (3.3 km/h) on sand is a different trial and stays off the rank.
Secor, Jayne and Bennett 1992 is the citation Tingle reprints. The conditions are part of the number. A hotter or cooler trial is not a separate figure, so this does not adjust 2.3 mph (3.7 km/h) for temperature.
Provenance
Claimed, measured and official figures side by side, each with its source. The ranked figure is marked.
Jessica L. Tingle 2020, Table 3, cell for Crotalus cerastes: 2.3 mph (3.7 km/h), burst speed trials on a track with rubber matting at 30 C, Secor et al. 1992, several individuals, two trials each. The figure is that 2.3 mph (3.7 km/h). Mosauer 1935's 2.1 mph (3.3 km/h) on sand is the other controlled cell and is not a separate record.
The same table says 2.1 mph (3.3 km/h) for Mosauer 1935 on sand. A popular figure near 18 mph is not either cell.
Reference
Context
Tingle's 2020 review, Table 3, says 2.3 mph (3.7 km/h) for Crotalus cerastes and attributes it to Secor, Jayne and Bennett 1992: burst trials on a rubber-matted track at 30 C, several individuals, two trials each. The figure is 2.3 mph (3.7 km/h), qualifier verified, because that paper measured it and the review reprints the cell.
The same table says 2.1 mph (3.3 km/h) for Mosauer 1935, burst trials on sand. That slower sand figure is not a separate record. The review's own range for sidewinding specialists, 0.684 mph to 3.4 mph (1.1 to 5.5 km/h) across four species, is not a sidewinder peak. A popular claim near 18 mph is not these trials. The number is travel speed. It is not a strike.
Head to head
1.5× slower5.5km/h3.4mph1.5m/s3.0kn
Sidewinder vs Field's horned viper
2.8× faster1.3km/h0.808mph0.361m/s0.702kn
1.8× slower6.5km/h4.0mph1.8m/s3.5kn
Sidewinder vs Painted saw-scaled viper
3.4× faster1.1km/h0.684mph0.306m/s0.594kn
Every report is read by a person, and corrections are dated on the page.