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Guadalupe Mountains National Park
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![A coiled rattler waits patiently for its prey. A coiled rattler waits patiently for its prey.](https://webarchive.library.unt.edu/eot2008/20081013011618im_/http://www.nps.gov/imr/customcf/apps/CMS_HandF/Pictures/GUMO_rattler.jpg) |
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Did You Know?
Equipped with the most efficient heat receptors in the animal world, rattlesnakes distinguish not only direction of an object that differs in temperature from its background, but also distance, sensing changes < .001 degree Farhenheit.
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Last Updated: July 17, 2008 at 17:35 EST |