Chris Gomersall / 2020VISION / Seven spot ladybird (Coccinella septempunctata) on Black knapweed (Centaurea nigra) flower at RSPB's Hope Farm Reserve, Cambridgeshire, England, UK, July
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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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Ernie Janes / RF- Ox-eye Daisies (Leucantemum vulgare) and Common Knapweed (Centaurea nigra) in hay meadow, Wensum Valley, Norfolk, UK. July. (This image may be licensed either as rights managed or royalty free.)
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Chris Gomersall / 2020VISION / Buff-tailed bumble bee (Bombus terrestris) feeing on nectar from a Black knapweed flower (Centaurea nigra) at RSPB's Hope Farm Reserve, Cambridgeshire, England, UK, July
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Chris Gomersall / 2020VISION / Male Small skipper butterfly (Thymelicus sylvestris) feeding on nectar from Black knapweed (Centaurea nigra) flower at RSPB's Hope Farm Reserve, Cambridgeshire, England, UK, July
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Chris Gomersall / 2020VISION / Buff-tailed bumble bee (Bombus terrestris) feeing on nectar from a black knapweed flower (Centaurea nigra) at RSPB's Hope Farm Reserve, Cambridgeshire, England, UK, July
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David Kjaer / Lesser / Black Knapweed {Centaurea nigra} in flower, Wiltshire, UK.
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Ross Hoddinott / Lesser / Black knapweed {Centaurea nigra} UK
