Herpyllus ecclesiasticus, commonly called the eastern parson spider, is a species of spider named after the abdominal markings resembling an old-style cravat worn by clergy in the 18th century. It is mainly found in North America east of the Rocky Mountains, from Alberta, Canada, east to Nova Scotia, and south to Tamaulipas, Mexico, and Florida, US. Individuals can be found throughout the year, both in homes and under rocks or logs in deciduous forests.

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