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Pronghorn — printable fact sheet
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Pronghorn
Antilocapra americana
Antilocapra americana is the fastest land animal in the Western Hemisphere, sustaining around 65 km/h for kilometres and sprinting past 88 km/h, and it is far better at endurance than a cheetah, which is exhausted in under a minute. Nothing alive today can catch it — which is th…
Did you know?
- Pronghorns evolved their speed to outrun extinct North American cheetahs, not any current predator.
- The pronghorn herd that summers in Grand Teton makes a round trip of roughly 480 km to the Upper Green River Basin, the longest land migration in the lower 48 states, and it passes through a bottleneck barely 100 m wide at one point. Females carry two fawns and, in utero, the embryos compete lethally: a developing embryo can pierce and kill a rival with a sharp process, so litters are culled before birth. The pronghorn's speed record is verified — it has been clocked running alongside vehicles, and it can outrun any predator it has met in the last 10,000 years by a wide margin.
What I learned
Draw the pronghorn
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