Fencepost jumping spider

Marpissa muscosa · Order: Araneae · Family: Salticidae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Fencepost jumping spider
Photo: Rupert Lees, CC BY

The fencepost jumping spider is grey to brown, furry and flattened in shape. Females are 7.5 to 14 mm long and males are 6 to 8.1 mm long.

Source: Wikipedia

How to recognize it

Both sexes are grey to brown, furry and have a flattened body.

Source: Wikipedia

Size

Females measure 7.5 to 14 mm and males 6 to 8.1 mm in body length.

Source: Wikipedia

Where it comes from

The species occurs throughout the Palaearctic region and is widespread in northern Europe.

Source: Wikipedia

Status: introduced in Canada. Source: iNaturalist

More photos

Fencepost jumping spider photo 3
Photo: ajott, CC BY
Fencepost jumping spider photo 4
Photo: Paul Lewis, CC BY
Fencepost jumping spider photo 5
Photo: Donald Davesne, CC BY
Fencepost jumping spider photo 6
Photo: unknown, CC0

Same family (Salticidae)

Bold Jumping SpiderBold Jumping SpiderPhidippus audaxCan biteZebra Jumping SpiderZebra Jumping SpiderSalticus scenicusHarmlessTan Jumping SpiderTan Jumping SpiderPlatycryptus undatusCan biteGray Wall Jumping SpiderGray Wall Jumping SpiderMenemerus bivittatusHalf-edged Wall Jumping SpiderHalf-edged Wall Jumping SpiderMenemerus semilimbatusBronze Jumping SpiderBronze Jumping SpiderEris militaris

Sources

  • Wikipedia: https://en.wikipedia.org/wiki/Marpissa_muscosa

Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia

Text written 2026-10-22 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.

How this page works

This is one bug's fact sheet. The colored box at the top says whether it is dangerous. Sections below cover how to recognize it, whether it is a pest, and how to deal with it. The US map shows which states have records; tap a state to see other bugs there.

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