Dave Bevan / Harvest mouse (Micromys minutus) climbing a Thistle (Cirsium), UK, July. Captive.

Dave Bevan / Harvest mouse (Micromys minutus) climbing up and chewing on a thistle (Cirsium) stem, UK, July. Captive.

Nick Upton / Slow motion cllip of a Marbled white butterfly (Melanargia galathea) nectaring on a Creeping thistle (Cirsium arvense) flower, with another trying to court with it, Wiltshire, England, UK, July.

Ann & Steve Toon / Wildflowers, including poppies (Papaver rhoeas), corn marigold (Glebionis segetum), cornflowers (Centaurea cyanus) and corn chamomile (Anthemis arvensis), being grown for seed by Landlife, Fir Tree Fa...

Paul Harcourt Davies / Floral colour in fields on the Piano Grande from Poppies (Papaver rhoeas), Cornflowers (Centaurea), Mustard (Brassica) and Mayweed (Anthemis), Umbria, Italy, June

Paul Harcourt Davies / Cornflowers (Centaurea cyanus) and poppies (Papaver rhoeas) growing on fallow fields near Orvieto, Umbria, Italy. June 2010

Nigel Cattlin / Creeping thistle (Cirsium arvense) with chlorosis caused by PST bacteria (Pseudomonas syringae pv tagetis). Dorset, England, UK. October.

Nigel Cattlin / Creeping thistle (Cirsium arvense) with chlorosis caused by PST bacteria (Pseudomonas syringae pv tagetis). Dorset, England, UK. October.

Nigel Cattlin / Creeping thistle (Cirsium arvense) with leaf chlorosis caused by Bacteria (Pseudomonas syringae pv tagetis). Berkshire England, UK. June.

Dave Bevan / Juvenile Harvest mice (Micromys minutus) climbing a Thistle (Cirsium), UK, July. Captive.

Ashley Cooper / A wind farm near La Calahorra in Andalucia, Spain. May 2011

Ashley Cooper / A wind farm near La Calahorra in Andalucia, Spain. May 2011