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

Ralph Pace / Florida Gopher Tortoise (Gopherus polyphemus), Disney Wilderness Preserve, Florida

David Perpinan / Carapacial fracture in a gopher tortoise (Gopherus polyphemus) after being hit by a car. Rehabilitation Centre, Georgia, United States. Small repro only

Ashley Cooper / A sign about the Mojave desert tortoise (Gopherus agassizii) near Lake mead in Nevada, USA. September 2014

Barry Mansell / Gopher tortoise (Gopherus polyphemus) North Florida, USA, May. Small repro only

Tim Fitzharris / Desert Tortoise (Gopherus agassizii), Santa Catalina Mountains, Arizona

Tim Fitzharris / Desert Tortoise (Gopherus agassizii), Arizona

Michael Durham / Florida Gopher Tortoise (Gopherus polyphemus) emerging from burrow, Timucuan Ecological and Historic Preserve, Florida

Cyril Ruoso / Gopher tortoise (Gopherus berlandieri) with head withdrawn into shell, South Texas, USA, April.