Sue Daly / Selfheal (Prunella vulgaris), Sark, British Channel Islands, July.

Andy Sands / Self heal (Prunella vulgaris) Close up of flower, Oxfordshire, England, UK, June - Focus Stacked Image

Colin Varndell / Selfheal (Prunella vulgaris) in flower. Dorset, UK, June.

Will Watson / Garden Bumblebee (Bombus hortorum) pollinating Selfheal (Prunella vulgaris) in garden lawn, Hererfordshire, England, UK, July.

Brent Stephenson / Dunnock (Prunella modularis) feeding amongst short grass. Havelock North, Hawkes Bay, New Zealand, September. Introduced species in New Zealand.

Brent Stephenson / Dunnock (Prunella modularis) feeding amongst short grass. Havelock North, Hawkes Bay, New Zealand, September. Introduced species in New Zealand.

Radomir Jakubowski / Alpine Accentor (Prunella collaris) Bernese Alps, Switzerland, April.

Mike Read / Dunnock (Prunella modularis) in hazel, New Forest National Park, Hampshire, England, UK, February.

Fabrice Cahez / Common self-heal (Prunella vulgaris) Aubrac, Auvergne, France, July.

Robert Thompson / Self heal (Prunella vulgaris) flower, Gedre, Pyrenees National Park, Hautes Pyrenees, France, July.

Nick Upton / Dunnock (Prunella modularis) perched on a lichen encrusted dead branch in farmland, Marlborough Downs, Wiltshire, UK, July.

Nick Upton / Alpine accentor (Prunus collaris) perched on a snow-covered hand-rail at an alpine chalet, with snow-covered mountain slopes and trees in the background, Hauteluce, Savoie, France, January.