Nigel Cattlin / Ragwort (Jacobaea vulgaris) flowers with ray and disc florets. Berkshire, England, UK. July.

Nick Upton / Cinnabar moth (Tyria jacobaeae) caterpillar feeding on Ragwort (Jacobaea vulgaris) in meadow. Wiltshire, England, UK. July.

Bernard Castelein / Cinnabar moth (Tyria jacobaea) caterpillars on Ragwort (Senecio jacobaea) Peerdsbos, Brasschaat, Belgium. July

Heather Angel / Mother of pearl (Pleuroptya ruralis) moth nectaring on Ragwort (Jacobaea vulgaris) at night. Surrey, England, UK. July.

Ernie Janes / Vipers bugloss (Echium vulgare) in flower with Ragwort (Senecio jacobaea) Scotland, UK. July.

Philippe Clement / Cinnabar moth caterpillar (Tyria jacobaeae) feeding on leaves of Common ragwort (Jacobaea vulgaris) in summer, Belgium, July

Ernie Janes / Rosebay willowherb (Epilobium angustifolius) and Ragwort (Jacobaea vulgaris) near Syderstone Common, Norfolk, England, UK, July.

Stephen Dalton / Creeping thistle (Cirsium arvense) and Ragwort (Jacobaea vulgaris) Sussex, England, UK, August.

Nick Upton / Cinnabar moth (Tyria jacobaeae) caterpillars feeding on Ragwort (Jacobaea vulgaris), Corfe Common, Dorset, UK, July.

Nick Upton / Cinnabar moth caterpillars (Tyria jacobaeae) feeding on Ragwort (Jacobaea vulgaris), Corfe Common, Dorset, UK, July.

Alex Hyde / Cinnabar moth (Tyria jacobaeae) caterpillar feeding on Common ragwort (Jacobaea vulgaris). Peak District National Park, Derbyshire, UK, July.

Alex Hyde / Cinnabar moth (Tyria jacobaeae) caterpillars feeding on Common ragwort (Jacobaea vulgaris). Peak District National Park, Derbyshire, UK, July.

Rod Williams / Hoverfly (Volucella inanis) female, a wasp mimic, feeding on Ragwort (Jacobaea vulgaris) Brockley Cemetery, Lewisham, London, UK August

Rod Williams / Tree bumble bee (Bombus hypnorum) feeding on Ragwort (Jacobaea vulgaris) Brockley Cemetery, Lewisham, London, UK July

Rod Williams / Tree bumble bee (Bombus hypnorum) feeding on Ragwort (Jacobaea vulgaris) Brockley Cemetery, Lewisham, London, UK July

Martin Willis / Willie-wagtail (Rhipidura leucophrys), Gluepot Reserve, South Australia, Australia

Colin Varndell / Cleavers / Goose grass / Sticky willie (Galium aparine) seeds forming. Dorset, UK August

Rod Williams / Sun hoverfly (Helophilus pendulus) on Common ragwort (Senecio jacobaea) Brockley Cemetery, Lewisham, London UK August

Stephen Dalton / Ragwort (Jacobaea vulgaris) flowering in field Sussex, UK

Nick Upton / Parasite fly / Tachinid fly (Tachina fera) a parasite of noctuid moths, feeding on Ragwort flowers (Senecio jacobaea) in a woodland clearing, GWT Lower Woods reserve, Gloucestershire, UK, September.

Gary K. Smith / Wasteland on industrial estate with wildflowers including Ragwort (Senecio jacobaea), Teasel (Dipsacus fullonum) and Viper's bugloss (Echium vulgare) Norfolk, England UK. July

Alex Hyde / Common ragwort (Senecio jacobaea) flowers. Peak District National Park, Derbyshire, UK. August.

Alex Hyde / Painted lady butterfly (Vanessa cardu) feeding on Common ragwort (Senecio jacobaea). Peak District National Park, Derbyshire, UK. August.

Alex Hyde / Painted lady butterfly (Vanessa cardu) feeding on Common ragwort (Senecio jacobaea). Peak District National Park, Derbyshire, UK. August.

Alex Hyde / Small Tortoiseshell butterfly (Aglais urticae) feeding on Common ragwort (Senecio jacobaea). Peak District National Park, Derbyshire, UK. August.

Alex Hyde / Small tortoiseshell butterfly (Aglais urticae) feeding on Common ragwort (Senecio jacobaea). Peak District National Park, Derbyshire, UK. August.

Rob Drummond / Willie-wagtail (Rhipidura leucophrys), Victoria, Australia

Andrew Parkinson / Badger (Meles meles) sub-adult badger among some ragwort, Derbyshire, England, UK, July. Highly commended in the Habitat category of the BWPA competition 2014.

Rob Drummond / Willie-wagtail (Rhipidura leucophrys), Victoria, Australia

Alex Hyde / Common Ragwort (Jacobaea vulgaris) flowers, Derbyshire, England, UK, August. Invasive species, poisonous to livestock.

Alex Hyde / Common Ragwort (Jacobaea vulgaris) flowers, Derbyshire, England, UK, August. Invasive species, poisonous to livestock.

Alex Hyde / Common Ragwort (Jacobaea vulgaris) flowers in field, Derbyshire, England, UK, August. Invasive species, poisonous to livestock.

Alex Hyde / Common Ragwort (Jacobaea vulgaris) flowers in field with cattle, Derbyshire, England, UK, August. Invasive species, poisonous to livestock.

Alex Hyde / Common Ragwort (Jacobaea vulgaris) flowers, Derbyshire, England, UK, August. Invasive species, poisonous to livestock.

Alex Hyde / Common Ragwort (Jacobaea vulgaris) flowers against white background, Derbyshire, England, UK, August. Invasive species, poisonous to livestock.

Alex Hyde / Common Ragwort (Jacobaea vulgaris) flowers against white background, Derbyshire, England, UK, August. Invasive species, poisonous to livestock.

David Tipling / Willie Wagtail (Rhipidura leucophrys) on car, Cairns, Queensland, Australia, September.

Michael Durham / Cinnabar moth (Tyria jacobaeae) caterpillar on Tansy ragwort (Senecio jacobaea) flower head, Cascade Head Preserve, Oregon Coast, USA, August.

Michael Durham / Cinnabar moth (Tyria jacobaeae) on Tansy ragwort (Senecio jacobaea) flower head, Cascade Head Preserve, Oregon Coast, USA, August.

Nick Upton / Fallow field with flowering Common ragwort (Jacobaea vulgaris), Common Hogweed (Heracleum sphondylium) and Spear thistles (Cirsium vulgare) with mix of pastureland, arable crops, tree belts and the R...

Simon Bennett / Willie-wagtail (Rhipidura leucophrys), Australia

Simon Bennett / Willie-wagtail (Rhipidura leucophrys), Queensland, Australia

Jan Piecha / Willie-wagtail (Rhipidura leucophrys), Queensland, Australia

Rob Drummond / Willie-wagtail (Rhipidura leucophrys), Australia

Jan Wegener / Willie-wagtail (Rhipidura leucophrys), Victoria, Australia

Kim Taylor / Cinnabar Moth (Tyria jacobaeae) caterpillars feeding on Ragwort (Senecio jacobaea). Surrey, England

Juergen Freund / Willie Wagtail (Rhipidura leucophrys) in flight over water, Mungerannie Waterhole, South Australia, Australia

Roland Seitre / Emerald Tanager (Tangara florida). Willie Mazu Ecological Ranch, Chiriqui Grande, Bocas del Toro, Panama.

Roland Seitre / Wedge-billed Woodcreeper (Glyphorynchus spirurus). Willie Mazu ecological ranch, Chiriqui Grande, Bocas del Toro, Panama.

Martin Willis / Willie-wagtail (Rhipidura leucophrys), Cue, Western Australia, Australia

Martin Willis / Willie-wagtail (Rhipidura leucophrys), Winton, Queensland

Konrad Wothe / Willie-wagtail (Rhipidura leucophrys) parent with fledgling, North Queensland, Queensland, Australia

Konrad Wothe / Willie-wagtail (Rhipidura leucophrys) parent with begging fledgling, North Queensland, Queensland, Australia

Konrad Wothe / Willie-wagtail (Rhipidura leucophrys) fledgling, North Queensland, Queensland, Australia

Konrad Wothe / Willie-wagtail (Rhipidura leucophrys) parent incubating eggs on nest, North Queensland, Queensland, Australia

Konrad Wothe / Willie-wagtail (Rhipidura leucophrys) at nest, North Queensland, Queensland, Australia

Steven David Miller / Willie Wagtail / Black and White fantail (Rhipidura leucophrys) juvenile perched on branch, Muloorina Station, Oodnadatta Track, South Australia

Tim Laman / Black and white fantail (Rhipidura leucophrys) perched on a leaf, Tari Valley vicinity, Southern Highlands Province, Papua New Guinea

Steven David Miller / Australian South Seas Pearls from the White lip oyster (Pinctada maxima) Willie Creek Pearl Farm, Broome, Western Australia

Steven David Miller / Australian South Seas Pearls from the White lip oyster (Pinctada maxima) Willie Creek Pearl Farm, Broome, Western Australia

Steven David Miller / Oyster rack for the commercial cultivation of Australian South Seas Pearls from the White lip oyster (Pinctada maxima) Willie Creek Pearl Farm, Broome, Western Australia

Steven David Miller / Australian South Seas Pearls from the White lip oyster (Pinctada maxima) Willie Creek Pearl Farm, Broome, Western Australia

Roger Powell / Willie Wagtail / Black and white fantail {Rhipidura leucophrys} Victoria, Australia

Duncan Mcewan / Goose grass /Common cleaver / Sticky willie {Galium aparine} Fruits showing hooks. UK summer

WILLIAM OSBORN / Black and white / Willie wagtail {Rhipidura leucophrys} territorial display, Queensland, Australia

Dave Watts / Male Red kangaroo resting {Macropus rufus} with Willie wagtail on rump, Australia

Elizabeth White / Black and white fantail / Willie wagtail nest {Rhipidura leucophrys} Western Australia

Nigel Cattlin / Ragwort (Jacobaea vulgaris) yellow star-shaped flowers with ray and disc florets, some older and darker. Poisonous to livestock, Berkshire, July

Nigel Cattlin / Ragwort (Jacobaea vulgaris) yellow star-shaped flowers with ray and disc florets, some older and darker. Poisonous to livestock, Berkshire, July

Jan Wegener, BIA / Willie-wagtail (Rhipidura leucophrys), Victoria, Australia

Neil Aldridge / Panning shot of Ragwort (Jacobaea vulgaris) stem to flower, wildflower meadow, Wiltshire, England, UK.

Roland Seitre / Short-billed pigeon (Patagioenas nigrirostris) perched in tree, Willie Mazu Ecological Ranch, Bocas del Toro, Panama.

Mike Read / Meadow brown butterfly (Maniola jurtina) nectaring on Common ragwort (Senecio jacobaea) flowers, Powerstock Common Nature Reserve, Dorset, England, UK. July.

Roland Seitre / Violet-crowned Woodnymph (Thalurania colombica) hummingbird, Willie Mazu Ecological Ranch, Panama

Roland Seitre / White-necked Jacobin (Florisuga mellivora) hummingbird, Willie Mazu Ecological Ranch, Panama

Roland Seitre / White-necked Jacobin (Florisuga mellivora) hummingbird, Willie Mazu Ecological Ranch, Panama

Martin Willis / Willie-wagtail (Rhipidura leucophrys), Wondecla, Queensland, Australia

Bernard Castelein / Hedge brown (Pyronia tithonus) butterfly on Ragwort (Senecio jacobaea), Klein Schietveld Nature Reserve, Brasschaat, Belgium. August.

Bruce Thomson / Willie wagtail (Rhipidura leucophrys) adult and chick in nest sheltering from desert heat, Quilpie, Queensland, Australia.

Bruce Thomson / Willie wagtail (Rhipidura leucophrys) perching on a branch, Inglewood, Queensland, Australia.

Philippe Clement / Gatekeeper (Pyronia tithonus) butterfly feeding on nectar from Ragwort (Jacobaea vulgaris), Belgium. July.

Neil Aldridge / Slider shot of Ragwort flowers (Senecio jacobaea) in field margin with butterfly and other insects feeding, Somerset, England, UK, September.

Konrad Wothe / Willie wagtail (Rhipidura leucophrys) at nest. Papua New Guinea.

Konrad Wothe / Willie wagtail (Rhipidura leucophrys) pair at nest, one incubating. Papua New Guinea.

Konrad Wothe / Willie wagtail (Rhipidura leucophrys) on nest. Papua New Guinea.

Suzi Eszterhas / Willie wagtail (Rhipidura leucophrys) perched on back of Western grey kangaroo (Macropus fuliginosus). Kangaroo Island, South Australia.

Nick Upton / Close-up of a Cinnabar moth caterpillar (Tyria jacobaeae) feeding on a Ragwort flower (Senecio jacobaea) in a meadow, Wiltshire, England, UK, July.

Nick Upton / Cinnabar moth caterpillar (Tyria jacobaeae) feeding on a Ragwort flower (Senecio jacobaea) in a meadow, Wiltshire, England, UK, July.

Nick Upton / Cinnabar moth caterpillar (Tyria jacobaeae) and a Common red soldier beetle (Rhagonycha fulva) feeding on Ragwort flowers (Senecio jacobaea), Wiltshire, England, UK, July.

Nick Upton / Six spot burnet moths (Zygaena filipendulae) nectaring on Common ragwort flowers (Senecio jacobaea) among coastal sand dunes, The Gower, Wales, UK, August.

Will Watson / Common ragwort (Senecio jacobaea) surrounded by Tufted vetch (Vicia cracca), on a brownfield site, Worcester, England, July.

Nick Upton / Cinnabar moth caterpillar (Tyria jacobaeae) feeding on a Ragwort flower (Senecio jacobaea) in a meadow, Wiltshire, UK, July.

Nick Upton / Six spot burnet moths (Zygaena filipendulae) nectaring on Common ragwort flowers (Senecio jacobaea) among coastal sand dunes, The Gower, Wales, UK, August.