Kim Taylor / Marbled white butterflies (Melanargia galathea) visiting Greater knapweed (Centaurea scabiosa) Dorset, England, digital composite
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Kim Taylor / Marbled white butterflies (Melanargia galathea) visiting Greater knapweed (Centaurea scabiosa) Dorset, England, digital composite
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Nick Upton / Head on view of a Dark green fritillary butterfly (Argynnis aglaja) feeding on Greater knapweed flower (Centaurea scabiosa) with long proboscis, chalk grassland meadow, Wiltshire, UK, July
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Nick Upton / Dark green fritillary butterfly (Argynnis aglaja) feeding on Greater knapweed flower (Centaurea scabiosa) as another takes off in the background, chalk grassland meadow, Wiltshire, UK, July
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Philippe Clement / Greater knapweed (Centaurea scabiosa) flower and bud, Ardennes, Belgium, July
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Philippe Clement / Greater knapweed (Centaurea scabiosa) in flower, Ardennes, Belgium, July
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Nick Upton / Frtistch's knapweed (Centaurea scabiosa fritschii) flowering in a traditional hay meadow, Julian Alps, Slovenia, July
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Nick Upton / Frtistch's knapweed (Centaurea scabiosa fritschii) flowering in a traditional hay meadow with heavily forested Julian Alps in the background, Slovenia, July
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Laurie Campbell / Greater knapweed (Centaurea scabiosa) close-up of part of flower head, Caithness, Scotland, June
Nick Upton / Gall fly / Greater fruit fly (Terellia colon) female on flowerbud of host plant, Greater knapweed (Centaurea scabiosa), chalk grassland, Wiltshire, UK, June.
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Nick Upton / Gall fly / Greater fruit fly (Terellia colon) male on flowerbud of host plant, Greater knapweed (Centaurea scabiosa), chalk grassland, Wiltshire, UK, June.
