Ingo Arndt / Christmas Island Red Crabs (Gecarcoidea natalis) crossing closed road, during annual migration, Christmas Island, Indian Ocean, Australian Territory, November 2009.

Mark Taylor / Car park flooded by River Wey, with cars almost completely submerged during Christmas 2013 flooding, Guildford. Surrey, England, UK. 25th December 2013.

Ross Hoddinott / Tree and road sign in the snow, icy, wintry roads, early morning light, nr Bradworthy, Devon, UK. December 2010

Ross Hoddinott / Road and road sign in snow, early morning light, nr Bradworthy, Devon, Uk. December 2010

Ross Hoddinott / Tree and road sign in the snow on icy, wintry roads in early morning light, nr Bradworthy, Devon, UK. December 2010

Staffan Widstrand / Moose warning sign on roadside, Sweden.

Gabriel Rojo / Road sign on the Transpantaneira route warning drivers to watch out for wildlife. Mato Grosso , Brazil. 2017.

Chris Mattison / Unsuitable for HGVs sign in Welsh and English at entrance to narrow lane, advising lorry drivers not to follow Sat-nav. Monmouthshire, Wales, UK. 2018.

SCOTLAND: The Big Picture / Information Sign in Wester Ross indicating livestock grazing on moorland, Gairloch, Highlands, Scotland, UK.

David Fleetham / Road sign warning drivers that Nene goose (Branta sandvicensis), are found in the area. East end of Molokai, Hawaii. July 2017.

Philippe Clement / Eurasian otter / European otter (Lutra lutra) road warning sign for otters crossing street in coastal Scotland, Shetland, UK

Philippe Clement / Eurasian otter / European otter (Lutra lutra) road warning sign for otters crossing street in coastal Scotland, UK