Quick Facts on Feral Hogs

Wildlife Damage Management, Feral Hogs October 10, 2014 Print Friendly and PDF

Feral hog numbers are on the rise in the United States.  Likewise the problems they cause are also growing.  With attention on this invasive species, many myths are circulating about feral hog history, distribution, biology, and damage.  The following bullets will help get the facts straight.

History and Distribution

  • Swine were domesticated thousands of years ago from wild stock in Europe and Asia.
  • Swine were first introduced to North America by Spanish explorers. 
  • Confined and/or free-ranging domestic swine escaped from Hispanic and Anglo settlers—a source for feral hog population establishment.
  • More recently, feral hogs have been introduced for hunting purposes in the United States.
  • Feral refers to returning to an untamed state from a point of domestication.
  • Feral hogs can be found in 38 states.
  • There are an estimated 4-5 million feral hogs in the nation and 2.6 million in Texas.

Biology

  • European wild boar, feral hogs, and domestic swine all belong to the species Sus scrofa.
  • Feral hogs are not closely related to native collared peccary (javelina; Tayassu tajacu).
  • Feral hog coat color varies, but it is often solid black.
  • Females are reproductive at 8-10 months of age. 
  • Females are capable of producing 10-12 piglets per litter, but 4-6 young born per litter is more common in the wild.
  • Gestation is approximately 115 days.
  • Females are capable of having two litters per year but usually have only one.
  • Sounders are groups of females and young of various ages.
  • Boars typically move independent of sounders but join them for short periods.
  • Boars move greater distances than sounders to pursue breeding opportunities.
  • Feral hogs are omnivores, eating both plant and animal matter.

Damage

  • Feral hogs foul water sources for native wildlife and humans.
  • Feral hogs consume native wildlife and plants and jeopardize their population and health.
  • Feral hogs compete for food and habitat resources with native animals.
  • Feral hog rooting causes erosion and can compromise sensitive ecosystems as well as render some areas impassable for farm machinery.
  • Feral hogs will prey on the young of livestock and wildlife such as kids, lambs, and deer fawns.
  • Feral hogs harbor diseases (swine brucellosis, pseudorabies, and others), which can impact the livestock industry.
  • Feral hogs carry parasites that can be harmful to the livestock industry.

 

 

 

 

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USDA / NIFA

This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.