It's a spring thing

A skater enjoys the first warm days of the year along the lakeside in Lausanne (Keystone/Dominic Favre) Keystone Archive
Hang your head - a wet snowdrop (Keystone/Arno Balzarini) Keystone
Apple blossoms against the backdrop of the snow covered Glärnisch peak (Keystone/Arno Balzarini) Keystone
A male yellowhammer searching for food. This bird is a sure sign spring is on the way (Keystone) Keystone
Trees blooming in the capital Bern (Reuters/Stefan Wermuth) Reuters
Stripping down and sunbathing on a spring Sunday along the lake in Zurich (Keystone/Walter Bieri) Keystone
Cows grazing between blooming fruit trees in Igis in the Rhine Valley (Keystone/Arno Balzarini) Keystone
Hardly out and already covered up - willow buds drenched by late snow and ice (Keystone/Arno Balzarini) Keystone
Lily-white legs come out in Zurich (Keystone/Steffen Schmidt) Keystone
A view of Bern from the Rosengarten park (Swiss-Image) Swiss-Image
First leaves sprouting on la Treille, the official Geneva chestnut tree. This event has marked the start of spring in the city since 1818 (Keystone/Martial Trezzini) Keystone
A crocus pushes through some late snow in March (Keystone/Ennio Leanza) Keystone
With the first warm spring days, "Petanque" balls start flying, as here on the shores of Lake Zurich (Keystone/Walter Bieri) Keystone
Ilona gets ready for the clients turning up at this garden centre as soon as temperatures rise (Keystone/Steffen Schmidt) Keystone
Spring is around the corner when the grass frogs migrate from their winter quarters to their spawning pools (Keystone/Walter Bieri) Keystone
South of the Alps, a magnolia tree blooms in Lugano as temperatures hit 21 degrees Celsius (Keystone/Karl Mathis) Keystone
A skier heads downhill after a spring outing to the Schafberg in the Prättigau region of canton Graubünden (Keystone/Arno Balzarini) Keystone
A Japanese cherry tree leaves a pink carpet of blossoms draped over this parked car (Keystone/Alessandro della Bella) Keystone
Walking along the shores of Lake Maggiore in canton Ticino (Keystone/Martin Ruetschi)
First flight of the year - bee meets crocus (Keystone/Ennio Leanza) Keystone
Balancing act - window cleaners in action at the Feld school in Zurich during spring cleaning (Reuters/Siggi Bucher) Reuters
Ice cream, family outings and barbecues are unmistakable signs spring is here (Keystone/Arno Balzarini) Keystone
Another family outing - ducks on the roof of Bern's communication museum (Keystone/Yoshiko Kusano) Keystone
Seasonal colours - blue, green and blooming yellow canola (Keystone/Walter Bieri) Keystone
Taking in the warmth of an early spring day in Lugano with Monte Bre in the background (Keystone/Karl Mathis) Keystone