Wheeling birds, Isla San Pedro Martir, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Man wheeling cycle rickshaw laden with dung pats for use as domestic fuel, Hugli village, West Bengal, India, Asia

A murmuration of starlings, numbering well over a million birds, flock together to roost at dusk on the Avalon Marshes at Shapwick Heath Nature Reserve in Somerset

A murmuration of starlings, numbering well over a million birds, form the shape of an atomic bomb mushroom cloud as they come in to roost at dusk on the Avalon Marshes at Shapwick Heath Nature Reserve in Somerset

A murmuration of starlings, numbering well over a million birds, gather as a flock to roost at dusk on the Avalon Marshes at Shapwick Heath Nature Reserve in Somerset

Man wheeling child on bicycle in crowded street in Islamabad in Pakistan

Graffiti walls in Werregaren Straat, Ghent. Belgium

Nurse wheeling gurney in corridor of hospital

Two nurses wheeling gurney with patient in corridor of hospital

Rear view of couple wheeling bicycles along cycling path, Jupiter, Florida

Portrait of woman looking over shoulder at senior man, while getting on bicycle and laughing, Jupiter, Florida

Man with mountain bike, Utah, United States