This lovely specimen is a female Nursery Web Spider,
Pisaurina mira. These spiders resemble Wolf Spiders and are often mistaken for that type. Like the Wolf Spider, they are most often encountered on the ground and the female will carry around a silken bag of eggs. Where Wolf Spiders carry their egg sack attached near the end of the abdomen, the Nursery Web Spider carries hers farther forward near the center of the thoracic region. Young Wolf Spiders hatch and spend their early development hanging onto the female’s body. Nursery Web Spiders have an entirely different strategy.
As the time for hatching nears, the female Nursery Web Spider will attach her egg sack to some leaves and build a protective web that surrounds the site. The eggs will hatch and the young will spend their early days living inside this protective enclosure. The mass of young spiders can be seen in the upper left of the photo.
The mass of webbing is not so thick as to obscure the view inside. It would still be difficult for most small predators to penetrate the mass of webs and get at the babies.
The female keeps her legs anchored to the web and will respond defensively if she detects anything bothering the web.
The white mass is the remnants of the egg case. Discarded skins indicate that these spiderlings have completed one molt.
The young are quite active inside their temporary nursery. These will soon be leaving the nest to begin life on their own. They’ve reached the size where they are ready to begin feeding and their only prey inside the web is each other.
This lovely specimen is a female Nursery Web Spider, Pisaurina mira. These spiders resemble Wolf Spiders and are often mistaken for that type. Like the Wolf Spider, they are most often encountered on the ground and the female will carry around a silken bag of eggs. Where Wolf Spiders carry their egg sack attached near the end of the abdomen, the Nursery Web Spider carries hers farther forward near the center of the thoracic region. Young Wolf Spiders hatch and spend their early development hanging onto the female’s body. Nursery Web Spiders have an entirely different strategy.
As the time for hatching nears, the female Nursery Web Spider will attach her egg sack to some leaves and build a protective web that surrounds the site. The eggs will hatch and the young will spend their early days living inside this protective enclosure. The mass of young spiders can be seen in the upper left of the photo.
The mass of webbing is not so thick as to obscure the view inside. It would still be difficult for most small predators to penetrate the mass of webs and get at the babies.
The female keeps her legs anchored to the web and will respond defensively if she detects anything bothering the web.
The white mass is the remnants of the egg case. Discarded skins indicate that these spiderlings have completed one molt.
The young are quite active inside their temporary nursery. These will soon be leaving the nest to begin life on their own. They’ve reached the size where they are ready to begin feeding and their only prey inside the web is each other.
