It’s a sound somewhere between a hoarse car alarm and a braying donkey. Barely visible through the foliage from ground level, the source of the racket sits in the upper branches of a decades-old ...

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 ...

Hong Kong (CNN) — It’s dusk in Hong Kong Park. Taxis screech past on the road outside, the shuffling footfall of commuters meandering home as the leaves rustle in the evening breeze, and then – It’s a ...