John Chan / American avocet (Recurvirostra americana) foraging in salt marsh, Southern California, USA.
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John Waters / Large murmuration of Common starlings (Sturnus vulgaris) swirling over reedbed roost at sunset, Ham Wall RSPB Reserve, Somerset, England, UK, January.
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John Waters / Large flock of Common starlings (Sturnus vulgaris) swirling over reedbed roost at dusk, Ham Wall RSPB Reserve, Somerset, England, UK, November.
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John Waters / Large flock of Common starlings (Sturnus vulgaris) swirling over reedbed roost at dusk, Ham Wall RSPB Reserve, Somerset, England, UK, November.
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Michael Hutchinson / Marsh fritillary butterfly (Euphydryas aurinia) flying and landing on a Buttercup (Ranunculus), Devon, England, UK, June.
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Michael Hutchinson / Pair of Marsh fritillary butterflies (Euphydryas aurinia) courting on a Buttercup (Ranunculus), Devon, England, UK, June.
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Michael Hutchinson / Pair of Marsh fritillary butterflies (Euphydryas aurinia) courting on a Buttercup (Ranunculus), Devon, England, UK, June.
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Michael Hutchinson / Marsh fritillary butterfly (Euphydryas aurinia) nectaring from a Buttercup (Ranunculus) before taking off, Devon, England, UK, June.
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Michael Hutchinson / Pair of Marsh fritillary butterflies (Euphydryas aurinia) mating, Devon, England, UK, June.
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Michael Hutchinson / Close-up of a pair of Marsh fritillary butterflies (Euphydryas aurinia) mating, showing tips of abdomens, Devon, England, UK, June.
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Michael Hutchinson / Close-up of a pair of Marsh fritillary butterflies (Euphydryas aurinia) mating, shot tilt downs, Devon, England, UK, June.
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Michael Hutchinson / Male Marsh fritillary butterfly (Euphydryas aurinia) displaying to a female on a Buttercup (Ranunculus) flower, Devon, England, UK, June.