Gabriel Rojo / Marsh deer (Blastocerus dichotomus) male, Ibera Marshes, Corrientes Province, Argentina

Gabriel Rojo / Marsh deer (Blastocerus dichotomus) male with growing antlers in velvet, Ibera Marshes, Corrientes Province, Argentina

Gabriel Rojo / Marsh deer (Blastocerus dichotomus) Ibera Marshes, Corrientes Province, Argentina

Gabriel Rojo / Marsh deer (Blastocerus dichotomus) female. Ibera Marshes, Corrientes Province, Argentina

Gabriel Rojo / Marsh deer (Blastocerus dichotomus) male and female Ibera Marshes, Corrientes Province, Argentina

Gabriel Rojo / Marsh deer (Blastocerus dichotomus) male with antlers just beginning to grow, Ibera Marshes, Corrientes Province, Argentina

Pete Oxford / Marsh Deer (Blastocerus dichotomus) female, Pantanal, Mato Grosso, Brazil

Pete Oxford / Marsh Deer (Blastocerus dichotomus) male, Pantanal, Mato Grosso, Brazil

Luciano Candisani / Marsh Deer (Blastocerus dichotomus) male, Pantanal, Brazil

Hermann Brehm / Marsh Deer (Blastocerus dichotomous) in water, Pantanal, Brazil.

Angelo Gandolfi / Marsh Deer (Blastocerus dichotomus) buck and doe, Pantanal, Brazil

Angelo Gandolfi / Marsh Deer (Blastocerus dichotomus) buck, Pantanal, Brazil