Adult and baby wild pigs graze in a grassy field at NASA's Kennedy Space Center in Florida.

Several adult and baby wild pigs, in a variety of colors and patterns, graze in a grassy field at NASA's Kennedy Space Center in Florida. The wild pigs have flourished in the environs around Kennedy.

The center shares a boundary with the Merritt Island National Wildlife Refuge, consisting of 140,000 acres. The refuge provides a wide variety of habitats -- coastal dunes, saltwater estuaries and marshes, freshwater impoundments, scrub, pine flatwoods, and hardwood hammocks -- that provide sanctuary for more than 1,500 species of plants and animals, including about 331 species of birds. Photo credit: NASA/Jim Grossmann