CAPE CANAVERAL, Fla. – Alligators gather in the shallow water of a creek at NASA's Kennedy Space Center in Florida. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – Several alligators float at the surface of a creek at NASA's Kennedy Space Center in Florida. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – A manatee's nose breaks the surface of the water in a creek at NASA's Kennedy Space Center in Florida. Several alligators linger in the background. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – A parent and a baby manatee come up for air beneath the branches of a mangrove in a creek at NASA's Kennedy Space Center in Florida. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – The NASA Railroad track borders a creek that often serves as a popular gathering place for alligators and manatees at Kennedy Space Center in Florida. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – An alligator glides through the shallow water of a creek at NASA's Kennedy Space Center. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – In a creek at NASA's Kennedy Space Center in Florida, a manatee in the foreground comes up for air, unbothered by a group of nearby alligators. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – Alligators gather in the shallow water of a creek at NASA's Kennedy Space Center in Florida. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – A parent and a baby manatee come up for air beneath the branches of a mangrove in a creek at NASA's Kennedy Space Center in Florida. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – A manatee raises its eyes and nose above the waterline in a creek at NASA's Kennedy Space Center in Florida. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper

CAPE CANAVERAL, Fla. – Manatees and alligators gather in a creek at Kennedy Space Center's Launch Complex 39 area. In the background from left to right are the Rotation, Processing and Surge Facility, mobile launcher and Vehicle Assembly Building. The center shares a boundary with the Merritt Island National Wildlife Refuge, which encompasses 140,000 acres that provide a habitat for more than 330 species of birds, 31 mammals, 117 fishes, and 65 amphibians and reptiles. Photo credit: NASA/Daniel Casper