Alex Hyde / Mountain Clouded Yellow (Colias phicomone) profile portrait, Aosta Valley, Monte Rosa Massif, Pennine Alps, Italy

Andy Sands / Clouded yellow butterfly (Colias crocea) On Wild sweet pea flower, Captive, UK, July

Andy Sands / Clouded yellow butterfly (Colias crocea) perched on Ragwort flower. West Sussex, UK.

Stephen Dalton / Clouded yellow butterfly {Colias crocea} in flight over thistle flowers, UK

Wild Wonders of Europe / Maitland / Clouded yellow butterfly (Colias croceus) feeding on Viper? bugloss (Echium vulgare) Lagadin region, Lake Ohrid, Galicica National Park, Macedonia, June 2009

Kim Taylor / Clouded yellow butterfly {Colias croceus} female feeding on scabious UK.

Silvia Reiche / Clouded Yellow (Colias croceus)butterfly on a flower, Pruggern, Styria, Austria

Silvia Reiche / Clouded Yellow (Colias croceus) butterfly on blade of grass, Pruggern, Styria, Austria

Silvia Reiche / Clouded Yellow (Colias croceus) butterfly pair feeding at purple flower, Pruggern, Styria, Austria

Silvia Reiche / Danube Clouded Yellow (Colias myrmidone) butterfly on seedhead, Pruggern, Styria, Austria

Silvia Reiche / Clouded Yellow (Colias croceus) on flower, Pruggern, Styria, Austria

Silvia Reiche / Clouded Yellow (Colias croceus) butterfly on a leaf, Pruggern, Styria, Austria

Pascal Pittorino / Clouded yellow butterfly (Colias croceus) feeding on a cosmos flower (Cosmos bipinnatus) in a garden, Grands Causses Regional Natural Park, Lozere, France, October

Andy Sands / Clouded yellow butterfly (Colias crocea) on lavender, Hertfordshire, England, UK, September - Focus Stacked Image - Captive

Andy Sands / Clouded yellow butterfly (Colias crocea) pupa on plant stem, Hertfordshire, England, UK, September - Focus Stacked Image - Captive

Andy Sands / Clouded yellow butterfly (Colias crocea) covered in dew early morning, Hertfordshire, England, UK, September - Focus Stacked Image

Konrad Wothe / Clouded yellow butterfly (Colias crocera) in flight, Upper Bavaria, Germany, August.

Konrad Wothe / Clouded yellow butterfly (Colias crocea) Upper Bavaria, Germany, August.

Konrad Wothe / Clouded yellow butterfly (Colias crocea) in flight, Upper Bavaria, Germany, August.

Konrad Wothe / Pale clouded yellow (Colias hyale) female, Bavaria, Germany, August.

Andy Sands / RF - Clouded yellow butterfly (Colias crocea) on lavender, Hertfordshire, England, UK, September. Focus stacked image. Captive. (This image may be licensed either as rights managed or royalty free.)

Jussi Murtosaari / Moorland clouded yellow butterfly (Colias palaeno), male flying and female resting on flower.

Edwin Giesbers / Clouded yellow butterfly (Colias crocea) nectaring on Mayweed (Anthemis sp) flower. Cyprus. April.

Loic Poidevin / Dark clouded yellow butterfly (Coleas crocea) on flower, Vendee, France, October.

Robert Thompson / Mountain clouded yellow butterfly (Colias phicomone) Bormio & St Caterina, Alps, Italy, June.

Robert Thompson / Mountain clouded butterfly (Colias phicomone) on clover flower, Stelvo Pass, Alps, Italy, June.

Lorraine Bennery / Adonis blue butterfly (Lysandra bellargus) and Berger's Clouded Yellow Butterfly (Colias alfacariensis), Hautes-Alpes, France, May.

Lorraine Bennery / Adonis blue butterfly (Lysandra bellargus) and Berger's Clouded Yellow Butterfly (Colias alfacariensis), Hautes-Alpes, France, May.

Lorraine Bennery / Clouded yellow butterfly (Colias croceus), Isere, France, May.

Lorraine Bennery / Berger's clouded yellow butterfly (Colias alfacariensis), Var, France, April.

Nick Upton / Clouded yellow butterfly (Colias croceus) nectaring on a Field scabious flower (Knautia arvensis), Picos de Europa mountains, Spain, August.

Kim Taylor / Pale clouded yellow butterfly (Colias hyale). Italy, July.

Kim Taylor / Pale clouded yellow butterfly (Colias hyale). Italy, July

Robert Thompson / Berger's clouded yellow butterfly (Colias alfacariensis) Riou de Meaulx, Provence, southern France, May.

Lorraine Bennery / Berger's clouded yellow butterfly (Colias alfacariensis) on Trefoil (Lotus sp.), Hautes-Alpes, France, April.

Ross Hoddinott / RF - Clouded yellow butterfly (Colias crocea) on devil's bit scabious (Succisa pratensis). Dunsdon Nature Reserve, Devon, UK. August 2014.

MYN / Dirk Funhoff / Clouded yellow butterfly (Colias croceus), Lorsch, Hessen, Germany. Meetyourneighbours.net project.

MYN / Dirk Funhoff / Clouded yellow butterfly (Colias croceus) pupa, Lorsch, Hessen, Germany. Meetyourneighbours.net project

MYN / Dirk Funhoff / Clouded yellow butterfly (Colias croceus), Lorsch, Hessen, Germany. Meetyourneighbours.net project

MYN / Dirk Funhoff / Clouded yellow butterfly (Colias croceus), Lorsch, Hessen, Germany. June. Meetyourneighbours.net project

Ross Hoddinott / Clouded yellow butterfly (Colias crocea) on Devil's bit scabious (Succisa pratensis), Dunsdon Nature Reserve, Devon, UK. August 2014.

Loic Poidevin / Dark clouded yellow butterfly (Colias croceus) on flower, Vendee, France, July.

Andy Sands / Clouded yellow butterfly (Colias crocea) feeding on Devil's bit scabious (Succisa pratensis), Hertfordshire, England, UK, September

Andy Sands / Clouded yellow butterfly (Colias crocea) resting on leaf, Hertfordshire, England, UK, September

Jussi Murtosaari / Moorland clouded yellow butterfly (Colias palaeno) one feeding on flower and one in flight, Lieksa, Pohjois-Karjala / North Karelia, Finland, June.

Jussi Murtosaari / Moorland clouded yellow butterfly (Colias palaeno) one feeding on flower and one in flight, Lieksa, Pohjois-Karjala / North Karelia, Finland, June.

Jussi Murtosaari / Clouded pale yellow butterfly (Colias hyale) in flight, Laitila, Lounais-Finland / South-Western Finland, Finland, July.

Jussi Murtosaari / Pale clouded yellow butterfly (Colias hyale) in flight, Laitila, Lounais-Finland / South-Western Finland, Finland, July.