Alex Hyde / Lesser burdock (Arctium minus) close up of seed hooks that catch on animal fur, allowing the seedhead to be transported, Peak District National Park, Derbyshire, UK. February.

Alex Hyde / Lesser burdock (Arctium minus) close up of seedheads showing hooks that catch on animal fur, allowing the seedhead to be transported, Peak District National Park, Derbyshire, UK. February.

Andy Sands / Goldfinch (Carduelis carduelis) perched on snow covered Lesser Burdock seedhead, December, Hertfordshire, UK

Andy Sands / Blue tit (Parus caeruleus) on snow covered seedhead of Lesser Burdock, December, Hertfordshire, UK

Roger Powell / Flock of Goldfinches (Carduelis carduelis) landing on dead Lesser Burdock (Arctium minus) seed heads to feed. Northumberland, UK

Brian Lightfoot / Lesser burdock {Arctium minus} Scotland, UK

Adrian Davies / Prickly seeds of Lesser Burdock (Arctium minus) with spiderweb, UK

Niall Benvie / Lesser burdocks {Arctium minus} in Estonian winter landscape.

Mike Wilkes / Greenfinch {Carduelis chloris} feeding on Lesser Burdock seeds {Arctium minus} Warwickshire, UK.

Mike Wilkes / Greenfinch {Carduelis chloris} feeding on Lesser burdock seed {Arctium minus} Warwickshire, UK.

Mike Wilkes / Greenfinch {Carduelis chloris} feeding on Lesser burdock seeds {Arctium minus} Warwickshire, UK.

David Kjaer / Goldfinch {Carduelis carduelis} on Lesser Burdock seedhead, Wiltshire, UK