Nick Upton / Close-up of a Meadow brown butterfly (Maniola jurtina) nectaring on a Greater knapweed flower (Centaurea scabiosa) in a chalk grassland meadow, Wiltshire, England, UK, June.

Nick Upton / Two Dark green fritillary butterflies (Argynnis aglaja) and a Narrow-bordered five-spot burnet moth (Zygaena lonicerae) nectaring on a Greater knapweed flower (Centaurea scabiosa) in a chalk grassland...

Nick Upton / Six-spot burnet moth (Zygaena filipendulae), Marbled white butterflies (Melanargia galathea) and a Dark green fritillary (Argynnis aglaja) nectaring on a clump of Greater knapweed flowers (Centaurea s...

Nick Upton / Marbled white butterflies (Melanargia galathea) nectaring on a clump of Greater knapweed flowers (Centaurea scabiosa) in a chalk grassland meadow, Wiltshire, England, UK, June.

Nick Upton / Marbled white butterflies (Melanargia galathea) nectaring on a clump of Greater knapweed flowers (Centaurea scabiosa) in a chalk grassland meadow, Wiltshire, England, UK, June.

Ross Hoddinott / Common blue butterfly (Polyommatus icarus) resting on devil's bit scabious (Succisa pratensis), Vealand Farm, Devon, UK. August

Ross Hoddinott / Female chalkhill blue butterfly (Lysandra coridon) with wings closed resting on Devils-bit scabious (Succisa pratensis), Hatch Hill, Somerset, UK. August 2016.

Nick Upton / Close up view of a Marbled white butterfly (Melanargia galathea) nectaring on a Field scabious (Knautia arvensis) flower, with another trying to court with it, Wiltshire, England, UK, July.

Nick Upton / Close-up of a Dark green fritillary (Argynnis aglaja) nectaring on a Greater knapweed (Centaurea scabiosa) flower and flying off, Wiltshire, England, UK, July.

Alex Hyde / Alpine meadow in flower including Scabious flowers. Austrian Alps at 1700 metres altitude, North Tyrol, Austria, June

MYN / Carsten Krieger / Close up of flower of Sheep's bit scabious (Jasione montana) County Clare, Republic of Ireland, July. meetyourneighbours.net project

Alex Hyde / Heath fritillary (Melitaea athalia) resting on scabious flower, Nordtirol, Austrian Alps, Austria, August.