George Sanker / Everglades racer (Coluber constrictor paludicola) with tongue out. Everglades National Park, Florida, USA. March.

George Sanker / Everglades racer (Coluber constrictor paludicola). Everglades National Park, Florida, USA. March.

George Sanker / Everglades racer snake (Coluber constrictor paludicola). Everglades National Park, Florida, USA. March.

Karine Aigner / Eastern yellow-bellied racer (Coluber constrictor flaviventris), eating a checkered garter snake (Thamnophis marcianus). Texas, USA, July.

MYN / JP Lawrence / Blackmask racer (Coluber constrictor latrunculus) coiled. Oxford, Mississippi, USA, April. Meetyourneighbours.net project

Pete Oxford / Eastern Racer (Coluber constrictor) in defensive posture, Little St. Simon's Island, Georgia

Pete Oxford / Northern Black Racer (Coluber constrictor constrictor) snake amid ferns, northern Georgia

Pete Oxford / Black racer (Coluber constrictor) Little St Simon's Island, Barrier Islands, Georgia, USA

James Christensen / Western Yellow-bellied Racer (Coluber constrictor mormon) near Imnaha, Oregon

Pete Oxford / Southern Black Racer (Coluber constrictor priapus), Little St. Simon's Island, Georgia

Pete Oxford / Southern Black Racer (Coluber constrictor priapus) in leaf litter, Little St. Simon's Island, Georgia

Pete Oxford / Southern Black Racer (Coluber constrictor priapus), Little St. Simon's Island, Georgia

Pete Oxford / Southern Black Racer (Coluber constrictor priapus) with tongue extended, Little St. Simon's Island, Georgia

Sebastian Kennerknecht / Western Yellow-bellied Racer (Coluber constrictor mormon) snake held by biologist, Pescadero, California

Shattil & Rozinski / Yellow bellied racer snake {Coluber constrictor} emerging from hole in log, Colorado, USA

Todd Pusser / Southern black racer {Coluber constrictor priapus} coiled under log, North Carolina, USA

Todd Pusser / Southern black racer {Coluber constrictor priapus} North Carolina, USA

Barry Mansell / Southern black racer snake {Coluber constrictor priapus} Florida, USA.

Jim Brandenburg / Eastern Yellow-bellied Racer (Coluber constrictor flaviventris) portrait, South Dakota

Barry Mansell / Southern black racer snake {Coluber constrictor priapus}

Pete Oxford / Eastern Racer (Coluber constrictor), Little Saint Simon's Island, Georgia

Pete Oxford / Eastern Racer (Coluber constrictor), Little St. Simon's Island, Georgia

Pete Oxford / Northern Black Racer (Coluber constrictor constrictor) snake coiled around ferns, northern Georgia