What is the typical size and color associated with the silken retreats of the yellow sac spider?
Answer
About half an inch, white or off-white silk
The silk retreats constructed by yellow sac spiders are small and architecturally simple. They are generally described as being quite small, measuring only about half an inch in dimension. Furthermore, the silk used to construct these protective pouches is typically light-colored, manifesting as white or off-white material. This small size and light color contribute to their relative inconspicuousness when tucked away in crevices.

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