Spider web with dew drops

Michigan Spider Guide

Discover and identify the diverse spider species found throughout Michigan. Learn about their habitats, behaviors, and whether they pose any risk to humans.

Showing 43 of 43 species

Wolf Spider
Low Risk
Wolf Spider
Lycosidae

Size:

10-20mm body length

Family:

Lycosidae

Habitat:

Ground level, gardens, fields, woodlands, and occasionally indoors

Northern Black Widow
Venomous
Northern Black Widow
Latrodectus variolus

Size:

8-10mm body length

Family:

Theridiidae

Habitat:

Dark sheltered areas, woodpiles, basements, garages, under eaves

Jumping Spider
Harmless
Jumping Spider
Salticidae

Size:

5-15mm body length

Family:

Salticidae

Habitat:

Walls, windows, vegetation, gardens, sunny areas

Black and Yellow Garden Spider
Harmless
Black and Yellow Garden Spider
Argiope aurantia

Size:

12-20mm body length

Family:

Aranidae

Habitat:

Gardens, fields, shrubs, areas with abundant insects

Fishing Spider
Low Risk
Fishing Spider
Dolomedes

Size:

12-25mm body length

Family:

Dolomedidae

Habitat:

Near water, marshes, ponds, streams, occasionally indoors during cold months

Northern Yellow Sac Spider
Moderate Risk
Northern Yellow Sac Spider
Cheiracanthium mildei

Size:

7-10mm body length

Family:

Cheiracanthiidae

Habitat:

Indoors and outdoors, under bark, in vegetation, common in homes

American Grass Spider
Harmless
American Grass Spider
Agelenopsis

Size:

10-20mm body length

Family:

Agelenidae

Habitat:

Grass, vegetation, gardens, fields, under eaves

Brown Recluse
Venomous
Brown Recluse
Loxosceles reclusa

Size:

6-11mm body length

Family:

Sicariidae

Habitat:

Rare in Michigan, prefers warm southern climates, occasionally found in imported goods

Cellar Spider (Daddy Long-Legs)
Harmless
Cellar Spider (Daddy Long-Legs)
Pholcidae

Size:

2-10mm body length (legs much longer)

Family:

Pholcidae

Habitat:

Cellars, basements, dark corners, caves, under bridges

Flower Crab Spider
Harmless
Flower Crab Spider
Misumena vatia

Size:

8-11mm body length

Family:

Thomisidae

Habitat:

Flowers, vegetation, gardens, parks

Common House Spider
Harmless
Common House Spider
Parasteatoda tepidariorum

Size:

5-8mm body length

Family:

Theridiidae

Habitat:

Indoors, corners, ceilings, attics, basements

Striped Lynx Spider
Harmless
Striped Lynx Spider
Oxyopes salticus

Size:

6-8mm body length

Family:

Oxyopidae

Habitat:

Vegetation, shrubs, gardens, meadows, often on plants

Dark Sac Spider
Low Risk
Dark Sac Spider
Clubiona

Size:

5-8mm body length

Family:

Clubionidae

Habitat:

Under bark, in leaf litter, vegetation, occasionally indoors

Ground Spider
Harmless
Ground Spider
Gnaphosidae

Size:

8-15mm body length

Family:

Gnaphosidae

Habitat:

Ground level, under rocks, logs, leaf litter, gardens

American House Spider
Harmless
American House Spider
Achaearanea tepidariorum

Size:

4-8mm body length

Family:

Theridiidae

Habitat:

Indoors, corners, closets, attics, sheds, garages

Spitting Spider
Harmless
Spitting Spider
Scytodes thoracica

Size:

4-5mm body length

Family:

Scytodidae

Habitat:

Indoors, basements, cellars, dark corners, occasionally outdoors

Sheet Web Spider
Harmless
Sheet Web Spider
Linyphiidae

Size:

2-8mm body length

Family:

Linyphiidae

Habitat:

Low vegetation, tall grass, shrubs, gardens, forests

Nursery Web Spider
Harmless
Nursery Web Spider
Pisauridae

Size:

10-20mm body length

Family:

Pisauridae

Habitat:

Near water, vegetation, gardens, woodlands, marshes

Trapdoor Spider
Low Risk
Trapdoor Spider
Ctenizidae

Size:

10-15mm body length

Family:

Ctenizidae

Habitat:

Burrows in soil, gardens, woodlands, warm areas

Pirate Spider
Harmless
Pirate Spider
Mimetidae

Size:

3-8mm body length

Family:

Mimetidae

Habitat:

Vegetation, gardens, forests, often on other spider webs

Six-Eyed Spider
Harmless
Six-Eyed Spider
Dysdera crocota

Size:

8-15mm body length

Family:

Dysderidae

Habitat:

Under rocks, logs, leaf litter, gardens, occasionally indoors

Running Spider
Harmless
Running Spider
Philodromidae

Size:

5-10mm body length

Family:

Philodromidae

Habitat:

On walls, vegetation, tree bark, gardens, occasionally indoors

Banded Garden Spider
Harmless
Banded Garden Spider
Wasp Spider

Size:

8-15mm body length

Family:

Aranidae

Habitat:

Gardens, meadows, vegetation, areas with abundant insects

Funnel Weaver
Harmless
Funnel Weaver
Agelenidae

Size:

10-20mm body length

Family:

Agelenidae

Habitat:

Grass, vegetation, gardens, fields, building eaves

Green Lynx Spider
Harmless
Green Lynx Spider
Peucetia viridans

Size:

8-12mm body length

Family:

Oxyopidae

Habitat:

Vegetation, shrubs, gardens, meadows

Bold Jumping Spider
Harmless
Bold Jumping Spider
Phidippus audax

Size:

12-20mm body length

Family:

Salticidae

Habitat:

Buildings, gardens, vegetation, sunny areas

Marbled Orb Weaver
Harmless
Marbled Orb Weaver
Araneus marmoreus

Size:

8-12mm body length

Family:

Aranidae

Habitat:

Gardens, forests, vegetation, areas with abundant insects

Spotted Orb Weaver
Harmless
Spotted Orb Weaver
Neoscona crucifera

Size:

6-11mm body length

Family:

Aranidae

Habitat:

Gardens, fields, vegetation, areas with abundant insects

Long-Jawed Orb Weaver
Harmless
Long-Jawed Orb Weaver
Tetragnathidae

Size:

4-10mm body length

Family:

Tetragnathidae

Habitat:

Near water, vegetation, gardens, areas with abundant insects

Red Theridiid Spider
Harmless
Red Theridiid Spider
Theridion

Size:

3-5mm body length

Family:

Theridiidae

Habitat:

Vegetation, gardens, under eaves, indoors

Brown Widow Spider
Moderate Risk
Brown Widow Spider
Latrodectus geometricus

Size:

6-9mm body length

Family:

Theridiidae

Habitat:

Warm sheltered areas, occasionally in Michigan during warm months

Striped Wolf Spider
Low Risk
Striped Wolf Spider
Pardosa

Size:

8-15mm body length

Family:

Lycosidae

Habitat:

Ground level, gardens, fields, woodlands, grasslands

Striped Jumping Spider
Harmless
Striped Jumping Spider
Peckhamia picata

Size:

5-7mm body length

Family:

Salticidae

Habitat:

Buildings, gardens, vegetation, sunny areas

Brown Crab Spider
Harmless
Brown Crab Spider
Xysticus

Size:

5-10mm body length

Family:

Thomisidae

Habitat:

Vegetation, gardens, flowers, tree bark

Dark Fishing Spider
Low Risk
Dark Fishing Spider
Dolomedes tenebrosus

Size:

15-20mm body length

Family:

Dolomedidae

Habitat:

Near water, marshes, ponds, streams, swamps

European Grass Spider
Harmless
European Grass Spider
Eratigena atrica

Size:

10-20mm body length

Family:

Agelenidae

Habitat:

Grass, vegetation, gardens, fields, building eaves

Burrowing Wolf Spider
Low Risk
Burrowing Wolf Spider
Geolycosa

Size:

12-18mm body length

Family:

Lycosidae

Habitat:

Burrows in soil, gardens, fields, grasslands, woodlands

Pale Sac Spider
Low Risk
Pale Sac Spider
Cheiracanthium inclusum

Size:

6-9mm body length

Family:

Cheiracanthiidae

Habitat:

Indoors and outdoors, vegetation, under bark, common in homes

Furrow Orb Weaver
Harmless
Furrow Orb Weaver
Larinioides cornutus

Size:

7-13mm body length

Family:

Aranidae

Habitat:

Near water, vegetation, gardens, areas with abundant insects

Metallic Green Jumping Spider
Harmless
Metallic Green Jumping Spider
Neon reticulatus

Size:

4-6mm body length

Family:

Salticidae

Habitat:

Vegetation, gardens, flowers, sunny areas

Oxyopes Lynx Spider
Harmless
Oxyopes Lynx Spider
Oxyopes

Size:

5-8mm body length

Family:

Oxyopidae

Habitat:

Vegetation, shrubs, gardens, meadows, flowers

Comb-Footed Spider
Harmless
Comb-Footed Spider
Theridiidae

Size:

3-10mm body length

Family:

Theridiidae

Habitat:

Indoors, gardens, vegetation, under eaves

Nursery Tent Wolf Spider
Low Risk
Nursery Tent Wolf Spider
Lycosa

Size:

10-15mm body length

Family:

Lycosidae

Habitat:

Ground level, gardens, fields, grasslands

Over 500 Species

Michigan is home to more than 500 spider species, making it a hotspot for arachnid diversity.

Mostly Harmless

Only two Michigan spiders are medically significant: the Northern Black Widow and the rare Brown Recluse.

Beneficial Predators

Spiders are natural pest controllers, consuming vast quantities of insects that would otherwise damage crops and gardens.