David Welling / Texas tortoise {Gopherus berlandieri} Texas, USA

Norbert Wu / Desert Tortoise (Gopherus agassizii), Nevada

Larry Minden / Desert Tortoise (Gopherus agassizii) emerging from burrow beneath Mohave Desertrue (Thamnosma montana), Mojave Desert, California

Larry Minden / Desert Tortoise (Gopherus agassizii) in a field of yellow flowers, Mojave Desert, California

Richard Herrmann / Desert Tortoise (Gopherus agassizii), Joshua Tree National Park, California

Rolf Nussbaumer / Texas Tortoise (Gopherus berlandieri) male walking, Dinero, Lake Corpus Christi, South Texas, USA.

Pete Oxford / Florida gopher tortoise (Gopherus polyphemus) male at burrow, The Orianne Indigo Snake Preserve Telfair County, Georgia, USA, threatened species in Georgia

Pete Oxford / Florida gopher tortoise (Gopherus polyphemus) underneath view of male showing plastral projection - highly developed. The Orianne Indigo Snake Preserve, Telfair County, Georgia, USA. Threatened spec...

Pete Oxford / Gopher Tortoise (Gopherus polyphemus) female, The Orianne Indigo Snake Preserve, Telfair County, Georgia, USA

Rolf Nussbaumer / Texas Tortoise (Gopherus berlandieri), adult walking. Laredo, Webb County, South Texas, USA, April.

Rolf Nussbaumer / Texas Tortoise (Gopherus berlandieri), adult walking. Laredo, Webb County, South Texas, USA, April.

Rolf Nussbaumer / Texas Tortoise (Gopherus berlandieri), adult walking. Laredo, Webb County, South Texas, USA, April.

Rolf Nussbaumer / Texas Tortoise (Gopherus berlandieri), adult walking. Laredo, Webb County, South Texas, USA, April.

Richard Herrmann / Desert Tortoise (Gopherus agassizii), west of Harper Dry Lake, Mojave Desert, California

Richard Herrmann / Desert Tortoise (Gopherus agassizii) young female forages near dirt road, west of Harper Dry Lake, Mojave Desert, California

Richard Herrmann / Desert Tortoise (Gopherus agassizii) male, Rainbow Basin Natural Area, Mojave Desert, Barstow, San Bernadino County, California

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) male in burned area, Georgia

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) male, Georgia

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) male, Georgia

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) female going into burrow, Georgia

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) female, Georgia

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) female, Georgia

Daniel Heuclin / Portrait of a Desert Tortoise (Gopherus agassizii). Controlled conditions. Foothills of Catalina mountains, Arizona, October.

Daniel Heuclin / Desert Tortoise (Gopherus agassizii) walking across stony ground. Controlled conditions. Foothills of Catalina mountains, Arizona, USA, October.

Daniel Heuclin / Desert Tortoise (Gopherus agassizii) emerging from water. Controlled conditions. Foothills of Catalina mountains, Arizona, USA, October.

ZSSD / Desert Tortoise (Gopherus agassizii) in its native habitat, native to California

ZSSD / Desert Tortoise (Gopherus agassizii) in its native habitat, native to California

Claudio Contreras / Bolson tortoise (Gopherus flavomarginatus) in front of cactus, captive, Mapimi Biosphere Reserve, Chihuahuan Desert, Mexico, November

Claudio Contreras / Bolson tortoise (Gopherus flavomarginatus) walking, captive, Mapimi Biosphere Reserve, Chihuahuan Desert, Mexico, November

Claudio Contreras / Bolson tortoise (Gopherus flavomarginatus) near cacti, captive, Mapimi Biosphere Reserve, Chihuahuan Desert, Mexico, November

ZSSD / Desert Tortoise (Gopherus agassizii) walking, native to North America

ZSSD / Desert Tortoise (Gopherus agassizii) crossing road, Las Vegas, Nevada

ZSSD / Desert Tortoise (Gopherus agassizii) crossing road, Las Vegas, Nevada

Scott Leslie / Florida Gopher Tortoise (Gopherus polyphemus), Kissimmee Prairie Preserve State Park, Florida

John Cancalosi / Desert Tortoise (Gopherus agassizii) Arizona, USA

John Cancalosi / Desert Tortoise (Gopherus agassizii) with mouth wide open, Arizona, USA

Tom Vezo / Texas tortoise (Gopherus berlandieri) amongst flowers, Rio Grande, Texas, USA

Rob Tilley / Gopher Tortoise Crossing warning sign, Sanibel, Florida, USA

Rolf Nussbaumer / Texas tortoise {Gopherus berlandieri} and Strawberry cactus, Texas, US

Patricio Robles Gil / Texas tortoise (Gopherus berlandieri) crossing desert, leaving tracks in the sand, Tamaulipas, Mexico

JEFF FOOTT / Desert tortoise at den site {Gopherus agassizi} Arizona, USA

Steven David Miller / Road crossing sign for Florida gopher tortoise {Gopherus polyphemus} Florida, USA - endangered species

Patricio Robles Gil / Texas tortoise crossing sand {Gopherus berlandieri} Tamaulipas, Mexico

ZSSD / Desert Tortoise (Gopherus agassizii), native to the Mojave and Sonoran Deserts

Patricio Robles Gil / Texas Tortoise (Gopherus berlandieri) leaving tracks in rippled sand, Laguna Madre, Tamaulipas, Mexico

Patricio Robles Gil / Texas Tortoise (Gopherus berlandieri) leaving tracks in rippled sand, Laguna Madre, Tamaulipas, Mexico

Patricio Robles Gil / Texas Tortoise (Gopherus berlandieri) crossing rippled sand, Laguna Madre, Tamaulipas, Mexico

LYNN M. STONE / Desert tortoise {Gopherus agassizi} Arizona, US

LYNN M. STONE / Desert tortoise {Gopherus agassizi} Arizona, US

Steven David Miller / Florida gopher tortoise at burrow entrance {Gopherus polyphemus} FL, USA Doreshan

John Cancalosi / Desert tortoise (Gopherus agassizi) eating fruit Arizona, USA Sonoran Desert. Eating prickly pear cactus fruit.

John Cancalosi / Desert tortoise {Gopherus agassizi} eating prickly pear fruit, Arizona

Steven David Miller / Florida gopher tortoise entering burrow {Gopherus polyphemus} FL, USA, North America

Richard Herrmann / Desert Tortoise (Gopherus agassizii) young female forages west of Harper Dry Lake, Mojave Desert, California

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) male at burrow after burn, Georgia

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) male, Georgia

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) female, Georgia

Pete Oxford / Florida Gopher Tortoise (Gopherus polyphemus) female, Georgia

Steven David Miller / Florida gopher tortoise grazing {Gopherus polyphemus} Sanibel Is Florida USA

DAVID TIPLING / Florida gopher tortoise {Gopherus polyphemus} Florida USA

Steven David Miller / Florida gopher tortoise grazing {Gopherus polyphemus} Sanibel Is Florida USA