Claudio Contreras / Texas indigo snake (Drymarchon melanurus erebennus) close up amongst Vervain (Glandularia sp.) flowers, Laredo Borderlands, Texas, USA. April

Pete Oxford / Eastern diamondback rattlesnake (Crotalus adamanteus) close up of rattle, The Orianne Indigo Snake Preserve, Telfair County, Georgia USA, captive

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.

David Perpinan / Surgical site and procedure in a wild Eastern indigo snake (Drymarchon couperi) in order to place a subcutaneous radiotransmitter for a conservation project. Small repro only

David Perpinan / Endotracheal intubation in a wild Eastern indigo snake (Drymarchon couperi) anesthetized for a minor surgery small repro only

David Perpinan / Anesthesia of a wild Eastern indigo snake (Drymarchon couperi) using inhalant anesthetics in a zip lock bag. Small repro only.

David Perpinan / Snake fungal diseases in a wild Eastern indigo snake (Drymarchon couperi). This is an emerging disease in wild snakes of North America. Small repro only

David Perpinan / Snake fungal disease in a wild Eatern Indigo snake (Drymarchon couperi). This is an emerging disease in wild snakes of North America. Small repro only

Doug Wechsler / Black-tailed indigo snake (Drymarchon melanurus) swimming, Jorupe Reserve, Ecuador.

Doug Wechsler / Black-tailed indigo snake (Drymarchon melanurus) Jorupe Reserve, Ecuador.

Daniel Heuclin / Mexican indigo snake (Drymarchon melanurus rubidus) captive, occurs in Mexico.