That's A Vole Lot Of Babies...

Voles are the most prolific breeders in the rodent family.

Picture from FCPS

Voles produce between three and five pups per litter and up to 17 litters in a year.  A female vole can have 80 offspring in a year! However, since the vole has a wide variety of predators, including large birds, most only survive a few months in the wild.