John Downer / Black footed / Jackass penguins on beach {Speniscus demersus} Boulders Beach, South Africa

Nigel Cattlin / Elephant hawk-moth (Deilephila elpenor) caterpillar feeding on Orange balsam (Impatiens capensis) leaves. Berkshire, England, UK. September.

Nigel Cattlin / Orange balsam (Impatiens capensis). Kennet and Avon Canal, Berkshire, England, UK. August.

Nigel Cattlin / Orange balsam (Impatiens capensis) flowering and seeding at edge of Kennet and Avon Canal, Berkshire, England, UK. August.

Alex Hyde / Orange balsam / Orange jewelweed (Impatiens capensis) Strumpshaw Fen, Norfolk, UK, September.

Kirkendall-Spring / Arrowleaf Balsamroot (Balsamorhiza sagittata) flowering along Antelope Flats Road with Teton Range in the background, Grand Teton National Park, Wyoming, USA, June.

Kirkendall-Spring / Arrowleaf Balsamroot (Balsamorhiza sagittata) flowering along Antelope Flats Road with Teton Range in the background, Grand Teton National Park, Wyoming, USA, June.

Kirkendall-Spring / Balsamroot flowers (Balsamorhiza sagittata) along Antelope Flats Road with Teton Range in the background, Grand Teton National Park, Wyoming, USA, June.

Nick Upton / White-tailed bumblebee (Bombus lucorum) heavily dusted with pollen, using long proboscis to take nectar from Himlayan balsam (Impatiens glandulifera) flower. Wiltshire pastureland, UK, October

Adrian Davies / Balsam pear flowers + seedpod {Momordica charantia} Everglades, Florida, USA

Doug Wechsler / Two Ferruginous carpenter ants (Camponotus chromaiodes) on a Common jewelweed leaf (Impatiens capensis) sharing food with Aphids (Aphididae) they are tending, Bucks County, Pennsylvania, USA. Septembe...

Linda Pitkin / Orange balsam (Impatiens capensis) in flower, Kew, London, England. August.

Nick Upton / Orange balsam / Common jewelweed (Impatiens capensis) a North American plant naturalised in the UK, flowering by the Kennet and Avon Canal, Limpley Stoke, Wiltshire, UK, August.