British red deer could suffer the same fate as the red squirrel, a study has warned. Red deer are being outcompeted by sika ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

Native British red deer face replacement in the countryside by the invasive Asian sika deer, mirroring the fate of the red ...

I spent several long days in a hide on the moors, hoping to photograph the elusive merlin hunting. On the final evening, as the light faded, I started packing up to leave. The moment I stepped outside ...

(CNN) — In a west London park, a giant red deer roars in the rain. In the south of the city, a swan sits on the side of a road as a red bus hurtles by. And in Bristol, in southwest England, a ...