The pillbug, commonly referred to as the "roly-poly," is a terrestrial crustacean isopod that is closely related to lobsters and crayfish. They can grow to be about three-eighths of an inch long and live up to three years.

Eggs

The female pillbug carries the eggs in a pouch under her body. The number of eggs can be between two and 200, and they will hatch within two to seven weeks.

Early Months

The eggs later hatch into young pillbugs that closely resemble what they will look like as adults. The young pillbugs remain in their mother's pouch for about two months after hatching.

Adult Development

Development into an adult will take about a year, and the ultimate lifespan will depend primarily on survival conditions.

Breeding

Breeding typically occurs mostly in the spring season. Up to three broods are produced yearly.

Survival

Moisture is an important factor in the pillbug's survival. They will often group together to avoid water loss, and will remain in damp areas within the ground.