The abdomen is a yellow-gray except for a pale median band consisting of a series of connected triangles edged by brown.

They prefer mesic habitats, and are most commonly seen in the springtime, presumably as they are searching for mates as the weather warms.

Generally, C. captiosus can be found in both oak and pine trees, leaf litter, and caves.

[6] A study conducted by researchers at Lewis & Clark College on a single female C. captiosus found that it carried a total venom protein of 604.25.

[7] It has been reported that a bite from this species is described as a needle-like puncture with subsequent swelling about the site, nausea, dizziness, and flulike symptoms that persist for several days.