Burrow
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A burrow is a hole or tunnel excavated into the ground by an animal to construct a space suitable for habitation or temporary refuge, or as a byproduct of locomotion. Burrows provide a form of shelter
An eastern chipmunk at the entrance of its burrow
A black-tailed prairie dog, with young, emerges from its burrow
Bird burrows on the Volga shore near Kstovo, Russia
Crustacean burrows in a Jurassic limestone, southern Israel
Trace fossil
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A trace fossil, also called an ichnofossil, is a fossil record of biological activity by lifeforms, but not the preserved remains of the organism itself. Trace fossils contrast with body fossils, whic
Chirotherium footprints in a Triassic sandstone
The trackway Protichnites from the Cambrian, Blackberry Hill, central Wisconsin
Cross-section of mammoth footprints at The Mammoth Site, Hot Springs, South Dakota
Mesolimulus walchi fossil and track, a rare example of tracks and the creature that made them fossilized together