Nick Upton / 2020VISION / Common snail (Helix aspersa) crawling over edge of a low retaining wall in a garden, with house in the background, Wiltshire, England, UK, April . Property released.

Claus Meyer / Spider web retaining raindrops, Atlantic Forest ecosystem, Brazil

Nick Upton / Flowering Red Valerian (Centranthus ruber) growing from drainage pipe in a retaining wall, Looe, Cornwall, UK, June

Nick Upton / Flowering Red Valerian (Centranthus ruber) growing from drainage pipe in a retaining wall, with cars, buildings and Looe harbour in the background, Cornwall, UK, June 2012

Kim Taylor / Red mason bee (Osmia rufa) female building pollen retaining wall of mud and sand to separate egg cells in artificial nest box, Surrey, UK, April

Nick Upton / 2020VISION / Common snail (Helix aspersa) crawling over edge of a low retaining wall in a garden with house in the background, Wiltshire, England, UK, April . Property released.

Nick Upton / 2020VISION / Common snail (Helix aspersa) crawling along low retaining wall in a garden with house in the background, Wiltshire, England, UK, April . Property released.

Jane Burton / Common Frog (Rana temporaria) 9-week-old froglet with fully developed limbs but still retaining larval lips and tail

Jane Burton / Common Frog (Rana temporaria) 9-week-old froglet with fully developed limbs but still retaining larval lips and tail

Paul D Stewart / Map of the World with Voyage of the Beagle coloured in red. Appendix from 'The Voyage of HMS Beagle' by Charles Darwin (Cover Title) New Edition 1890 John Murray Publishers. Coloured print, retaining...

Paul D Stewart / Map of South America with Voyage of the Beagle coloured in red. Appendix from 'The Voyage of HMS Beagle' (Cover Title) by Charles Darwin, New Edition 1890 John Murray publishers. Coloured print, retai...