P. mira is known for its wide distribution across eastern North America and tend to inhabit high weeds or low shrubs in ecotonal areas.

This silk use for survival has been found to increase P. mira males' reproductive fitness, as they typically engage in mating with multiple females when not manipulated.

[5] Although the venom of P. mira is enough to kill its prey, which are usually small insects, it is insufficient for any lethal damage to bigger animals or humans.

[3] Pisaurina mira, commonly referred to as the nursery web spider, has a moderately high carapace, a hard layer that provides outer protection for the cephalothorax (combined head and thorax region).

[2] They inhabit tall grass, shrubs, and bushes, which gives them an advantage considering their hunting strategy, waiting for prey to come within their reach and using their pincers ("sit-and-wait ambush predator").

[7] Nursery web spiders are distributed across Eastern North America, ranging from Ontario and Quebec, extending southward to central Florida and the Rio Grande Valley of Texas.

Instead of setting up a spider web to passively wait for prey, the most significant silk use in P. mira is centered around the mating behavior.

[8] Likewise, with increasing temperature, the nursery web spiders become weaker predators, resulting in noticeably decreased prey mortality rate.

Due to the heat sensitivity of the nursery web spiders, the increased stress stemming from higher temperature result in the relinquishment of remarkable predator abilities.

While awaiting this process, the female also builds a "nursery web" by gathering leaves together, a safe place where the spiderlings will grow.

Because the female grows increasingly active throughout repeated copulations, copulatory silk wrapping is assumed to be an example of a self-defense mechanism adopted by the male nursery spiders.

When the male P. mira is able to successfully avoid sexual cannibalism, it mates with multiple females to increase the numbers of offspring.

[5] Because the use of silk web to immobilize during copulation can ensure a greater chance at multiple mating, we can assume it to be a positive trait that is selected for among the males.

[10] It is, however, still presumed that the silk wrapping is a trait evolved in males for an advantage in sexual selection and a maximization of reproductive fitness.

More specifically, the use of silk veils was found to often grant higher fertilization success, as it interfered with the female's tactile and chemical receptors.

For example, the highest population level of tarnished plant bugs, a prevalent pest for crops in the United States, was marked in October and June.

The presence of P. mira alters the dietary habits of grasshoppers, which consequently increases the carbon storage by allowing the plants to take over a larger area for photosynthesis as they can conserve the resources that were once reserved for self-protection.

[12] They are also known to consume tarnished plant bugs, a pest that holds economic significance on many crops in the United States, mostly for small fruits and vegetables.