Eastern racer
#2 · Coluber constrictor · travel
Snakes
Guinness says 9.9 mph to 11.8 mph (16–19 km/h) for the black mamba in short bursts. The figure is 9.9 mph (16 km/h), the bottom of that range. A strike speed is not a separate figure.
A black mamba can travel 9.9 mph (16 km/h), an official figure.
Top speed
Published as 16 km/hPublished as 16 km/hPublished as 16 km/h
Guinness fastest land snake: the black mamba can reach 10 to 12 mph (16 to 19 km/h) in short bursts over level ground. The figure is 9.9 mph (16 km/h), the bottom of that published range. 11.8 mph (19 km/h) is not a separate figure as a separate peak. This is travel, not strike speed.
In context
Worked out from the sourced figure above, which stays the ranked number.
Quick answers
A black mamba can travel 9.9 mph (16 km/h), an official figure.
Black mamba is labeled Official. Ratified by a governing body such as the FIA, World Athletics or Guinness World Records.
The figure cites Guinness World Records, “Fastest land snake.”
Black mamba is 1st of 7 on Fastest Snakes.
Mechanism
Guinness says about 10 to 12 mph (16 to 19 km/h) for the black mamba, Dendroaspis polylepis, in short bursts. The figure is 9.9 mph (16 km/h), the bottom of that range. A strike speed is not a separate figure.
A range of 9.9 mph to 11.8 mph (16 to 19 km/h) is not one measurement. The page uses 9.9 mph (16 km/h) so the page does not pick the top of a Guinness range. The locomotion is a short burst of lateral undulation. A strike, the head moving at prey, is a different motion.
Tingle's table of sidewinders and adders is in the single digits of km/h, from named trials. The mamba's 9.9 mph (16 km/h) is a Guinness range, a different kind of source. It is not averaged with the rosy boa's 0.249 mph (0.4 km/h).
Provenance
Claimed, measured and official figures side by side, each with its source. The ranked figure is marked.
Guinness fastest land snake: the black mamba can reach 10 to 12 mph (16 to 19 km/h) in short bursts over level ground. The figure is 9.9 mph (16 km/h), the bottom of that published range. 11.8 mph (19 km/h) is not a separate figure as a separate peak. This is travel, not strike speed.
Wikipedia says up to 9.9 mph (16 km/h) for short distances. Animal Diversity Web says up to 12.4 mph (20 km/h). Those ceilings are not a separate record.
Reference
Context
Guinness calls the black mamba the fastest land snake and says a range, 9.9 mph to 11.8 mph (16 to 19 km/h) in short bursts over level ground. The figure is 9.9 mph (16 km/h), the bottom of that range. The top of the range is not a separate figure as if it were a measured peak.
Wikipedia, citing field guides, says the snake can move at up to 9.9 mph (16 km/h) for short distances and cannot move more quickly than 12.4 mph (20 km/h). Animal Diversity Web says up to 12.4 mph (20 km/h). Those sentences are the ceiling, not the figure. A strike speed was not in the sources that published a travel figure, so no strike is given.
Head to head
2.5× faster6.5km/h4.0mph1.8m/s3.5kn
2.9× faster5.5km/h3.4mph1.5m/s3.0kn
Every report is read by a person, and corrections are dated on the page.