Alex Hyde / Aposematism describes the use of bright colouration and bold patterns to advertise that an organism is unpalatable or dangerous. All three insects are foul-tasting or toxic if eaten: Wood Tiger moth...

Chris Gomersall / 2020VISION / Common nightingale (Luscinia megarhynchos) adult perched, singing, Cambridgeshire, UK, April. Photographer quote: 'Nightingales are more renowned for the beauty of their song than their looks. You are...

Terry Whittaker / 2020VISION / Grey Squirrel (Sciurus carolinensis) climbing over fence in parkland, Regent's Park, London, UK, April 2011. Photographer quote: 'Grey squirrels may be overfed, oversexed and over here, but they are s...

Jerry Monkman / Lone hiker at sunrise on the Bold Coast trail in Cutler, Maine, USA, June 2009. Model released

Jack Dykinga / Petrified sandstone formation with bold striated patterns and lichen covered stones, Paria Canyon-Vermilion Cllffs Wilderness, Arizona, USA

Karine Aigner / Blue wildebeest (Connochaetes taurinus) huddled together in a circle, protecting each other from a pack of four African wild dogs (Lycaon Pictus). Botswana.

Karine Aigner / African wild dogs (lycaon pictus) fighting with a Spotted hyena (Crocuta crocuta) Malilangwe Wildlife Reserve. Zimbabwe.

Mike Read / Bold Cove and Port Howard West Falkland, Falkland Islands, December 2016

John Abbott / Young male Bold jumper (Phidippus audax) jumping with its drag line visible Travis County, Texas, USA. Controlled conditions. March

Tui De Roy / Kea (Nestor notabilis) close up of wings, Arthur's Pass National Park, Southern Alps, New Zealand, August.

Tui De Roy / Keas (Nestor notabilis) in habitat, Arthur's Pass National Park, Southern Alps, New Zealand, August.

Tui De Roy / Kea (Nestor notabilis) in flight, Arthur's Pass National Park, Southern Alps, New Zealand, August.