Steven Kazlowski / Weddell seal (Leptonychotes weddellii) relaxing on a rocky beach on the western Antarctic Peninsula, Antarctica, Southern Ocean

Pete Oxford / Eastern indigo snake (Drymarchon couperi) The Orianne Indigo Snake Preserve, Telfair County, Georgia, USA, threatened species, captive

Rolf Nussbaumer / Texas indigo snake drinking {Drymarchon corais erebennus} Texas, USA.

Claudio Contreras / Central American Indigo Snake (Drymarchon corais melanurus). Maria Madre Island, Islas Marias Biosphere Reserve, Sea of Cortez (Gulf of California), Mexico, October.

Claudio Contreras / Central American Indigo Snake (Drymarchon corais melanurus). Maria Madre Island, Islas Marias Biosphere Reserve, Sea of Cortez (Gulf of California), Mexico, October.

Pete Oxford / Eastern indigo snake (Drymarchon couperi) The Orianne Indigo Snake Preserve, Telfair County, Georgia, USA, threatened species, captive

Pete Oxford / Eastern indigo snake (Drymarchon couperi) The Orianne Indigo Snake Preserve, Telfair County, Georgia, USA, threatened species, captive

Pete Oxford / Eastern indigo snake (Drymarchon couperi) The Orianne Indigo Snake Preserve, Telfair County, Georgia, USA, threatened species, captive

B&S Draker / Texas Indigo Snake (Drymarchon corais erebennus) adult at pond. Sinton, Corpus Christi, Coastal Bend, Texas, USA, April.

David Welling / Texas Indigo Snake (Drymarchon corais erebennus) looking alert by water. Santa Clara ranch, Starr County, Texas, USA, April.

David Welling / Texas Indigo Snake (Drymarchon corais erebennus) by water. Santa Clara ranch, Starr County, Texas, USA, April.

Pete Oxford / Eastern Indigo Snake (Drymarchon corais couperi) at river, native to the southeastern United States

Pete Oxford / Eastern Indigo Snake (Drymarchon corais couperi) at tortoise burrow, native to the southeastern United States