Dave Watts / Dark green fritillary (Argynnis aglaja) on pink clover, south west France.

Clay Bolt / Black and gold bumblebee (Bombus auricomus) flies in front of the Washington Monument on the National Mall, Washington DC, USA.

Nick Upton / Common spotted orchid (Dactylorhiza fuchsii), pale form, flowering alongside Ragged robin (Silene flos-cuculi) Common buttercups (Ranunculus acris) and Red clover (Trifolium pratense) in a traditional...

Ross Hoddinott / Marbled white butterfly (Melanargia galathea) resting on Red clover (Trifolium pratense) flower, Dunsdon, Devon, UK, July.

David Welling / Looking down on a bed of Crimson clovers {Trifolium incarnatum} in Redwoods National Park, California

Philippe Clement / Red clover flowering in field {Trifolium pratense} Belgium

Philippe Clement / Red clover flowering in field {Trifolium pratense} Belgium

Brian Lightfoot / Red clover (Trifolium pratense) in flower. Montrose, Scotland, UK, Europe

Duncan Mcewan / Red clover flowering in machair {Trifolium pratense} Outer Hebrides, Scotland, UK

Duncan Mcewan / Red clover flowers {Trifolium pratense} Scotland, UK

Russell Cooper / Red clover flower, UK

GEORGETTE DOUWMA / Four leaved clover - digitally manipulated image