What feature identifies a Trapdoor Spider?

The feature that identifies a Trapdoor Spider is the capped entrance to its burrow. Trapdoor Spiders are known for constructing silk-lined burrows that are usually hidden beneath a camouflaged lid made from soil, plant debris, and silk. This lid not only serves as a cover for the spider but also acts as a trap for unsuspecting prey. When an insect wanders too close to the entrance, the spider can quickly spring out and capture it.

In contrast, the other options do not accurately represent the characteristics of Trapdoor Spiders. Bright coloration is not typical of these spiders, as they are generally more subdued in color to enhance their camouflage. Trapdoor Spiders are not known for building webs in the same way as other spider species, such as orb-weavers; they primarily rely on their burrows for hunting and protection. Finally, the ability to change color is not a recognized trait of Trapdoor Spiders; they remain relatively constant in color to blend in with their surroundings.