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Nursery Web Spider (Pisaurina mira)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Nursery Web Spider.

 Updated: 2/18/2019; Authored By Staff Writer; Content ¬©www.InsectIdentification.org




The female Nursery Web Spider is a dedicated parental caretaker, usually seen with its egg sac until the spiderlings hatch.



The Nursery Web Spider derives its name from the delicate care a female takes of her egg sac. She gently carries the sac with fangs and builds a web for it in high weeds or low shrubs, suspending it inside of a leaf so it is less visible and more difficult to reach. The female surrounds the sac with layers of silk and then guards this leafy nursery and all her eggs until they hatch. Spiderlings remain in the nursery for about a week after hatching and then head out on their own.

This spider does not spin a web to catch prey. It is an ambush predator and uses its silk for other purposes. Males look slightly different than females, but both genders eat insects and other invertebrates. Look for females among leaf litter and herbaceous plants, carrying a white, golf-ball like sacs. It has a light brown or tan bodies have a darker brown streak running down the middle of the head region and abdomen. Males have a lighter streak.




Taxonomic Hierarchy
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Arachnida
      Order: Araneae
        Family: Pisauridae
          Genus: Pisaurina
            Species: mira
Identifying Information
Scientific Name: Pisaurina mira
Category: Spider
Size (Adult; Length): 7mm to 26mm (0.27in to 1.01in)
Colorwheel Graphic Colors: brown, gray, white, black
Descriptors: biting, venomous, hairy, spiky
Territorial Map
Alaska  
Hawaii  
Prince Edward Is.  
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Territorial Reach (A-to-Z)
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Canadian National Flag Graphic
Alberta
British Columbia
Manitoba
New Brunswick
Newfoundland and Labrador
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan
Mexican National Flag Graphic
Mexico
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above as they are driven by environmental factors (such as climate change), available food supplies and mating patterns. Grayed-out selections indicate that the subject in question has not been reported in that particular territory. U.S. states and Canadian provinces / territories are clickable to their respective bug listings.




Spider Anatomy
Graphic showing basic parts of spider anatomy
1
Legs: Spiders have four pairs of legs and these are attached to the cephalothorax.
2
Pedipalps: Small appendages near the mouth used as taste and smell organs.
3
Cephalothorax: Contains eyes, head, mouthparts, and legs.
4
Abdomen: Contains various organs related to digestion, reproduction, and web-making.
5
Spinnerets: Used in the production of spider silk for fashioning webs or catching prey.
NOTE: Unlike insects, spiders have both an endoskeleton (internal) and exoskeleton (external).