If you find a hairy ant-like insect nosing along the trail, it is probably a female velvet ant. Velvet ants are really wasps and may have reddish, whitish or even yellowish hairs. Female velvet ants lack wings and are noted for their potent stings (one species is commonly called "Cow Killer"). The female shown above from the Display Case is fairly typical. The winged males are sometimes seen at flowers. (There are some hairy digger wasps that superficially resemble winged males.)
I did find one similar to this on 2001 July 23 along the trail in McKittrick Canyon.
velvet ant
2003 September 24 at Pine Springs Visitor Center (at night)
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