Juan Carlos Munoz / Basket containing harvested Saffron crocuses (Crocus sativus) in a field, cultivated for saffron, Lleida, Catalonia, Spain, November.

Juan Carlos Munoz / Baskets of harvested Saffron crocuses (Crocus sativus), cultivated for saffron, Lleida, Catalonia, Spain, November.

Juan Carlos Munoz / Baskets of harvested Saffron crocuses (Crocus sativus), cultivated for saffron, Lleida, Catalonia, Spain, November.

Nick Upton / Carpet of Dutch crocuses (Crocus vernus) flowering in early spring, Wiltshire, UK, February.

Nick Upton / Carpet of Dutch crocuses (Crocus vernus) flowering in early spring, Wiltshire, UK, Fenruary.

Orsolya Haarberg / Crocuses (Crocus heuffelianus) in flower, with mountain landscape and frozen lake in the background, Retezat National Park, Transylvania, Romania, May 2015.

Erlend Haarberg / Crocuses (Crocus heuffelianus) flowering, Retezat National Park, Transylvania, Romania, May.

Philippe Clement / White and purple crocuses (Crocus sp) flowering in garden in spring. Belgium, March.

Angelo Gandolfi / Carpet of Purple Crocuses (Crocus angustifolius) in flower, Retezat National Park, South Carpathian Mountains, Romania

Angelo Gandolfi / Snowdrops (Galanthus sp) among Purple Crocuses (Crocus angustifolius) in flower, Retezat National Park, South Carpathian Mountains, Romania

David Kjaer / Portrait of Jay (Garrulus glandarius) foraging on grass,with crocuses (Crocus nudiflorus) Somerset, England

Philippe Clement / Crocus (Romulea) bulb with shoots