Silvia Reiche / Oldworld Swallowtail (Papilio machaon) caterpillar on fennel, Netherlands

Philippe Clement / Fennel (Foeniculum vulgare), Belgium, April.

Nick Upton / Soap Aloe (Aloe maculata / saponaria) and Giant Fennel (Ferula communis) flowering on a clifftop with the sea in the background. Algarve, Portugal, June.

Wild Wonders of Europe / Muñoz / Fennel (Foeniculum vulgare) close up of flowers, Campanarios de Azaba Biological Reserve, a rewilding Europe Area, Salamanca, Castilla y Leon, Spain

Nick Upton / Wild Fennel (Foeniculum vulgare) and Wild carrot (Daucus carota) umbels flowering in a traditional hay meadow with heavily forested Julian Alps in the background, in sunset light, Slovenia, July

Philippe Clement / Cultivated Fennel plants (Foeniculum vulgare) in field, Belgium

Jason Smalley / Bee {Colletes succinctus} on Fennel {Foeniculum vulgare} in sand dunes, Formby, Merseyside, UK.

Paul Harcourt Davies / Fennel flowers (Foeniculum vulgare) in a pot, drying in the sun before being made into powder, Podere Montecucco, Orvieto, Italy. August.

Colin Varndell / Two Harvest mice (Micromys minutus) juveniles, resting on Fennel (Foeniculum vulgare) stalk, Dorset, UK. February. Captive.

Nigel Cattlin / German wasp (Vespula germanica) feeding on nectar from fennel flowers, Berkshire, England, UK, August