Nick Garbutt / Veterinarian from Project Oncafari measuring teeth and jaw of Jaguar (Panthera onca palustris) female trapped following the death of a Cow. Caiman Lodge, southern Pantanal, Mato Grosso do Sul, Brazil....

SCOTLAND: The Big Picture / Conservationist from The Royal Zoological Society Scotland / RZSS measuring the size of a Scottish wildcat's (Felis silvestris grampia) testes. Inside RZSS mobile vet unit, Strathsprey, Cairngorms Nat...

SCOTLAND: The Big Picture / Field worker measuring bill of Golden eagle (Aquila chrysaetos) chick, Glen Tanar Estate, Aberdeenshire, Scotland, UK, June 2015.

Billy Black / Compass and dividers aboard cruising yacht.

Billy Black / Navigating with paper charts aboard Amel 54 ketch "Hollis" on delivery from Martinique, Caribbean. 2006.

Billy Black / Man navigating with paper charts aboard Amel 54 ketch "Hollis" on delivery from Martinique, Caribbean. 2006. Model and property released.

Edwin Giesbers / Antarctica - map / chart and mapping instruments including dividers and parallel rulers

Pete Oxford / Making wax honeycomb dividers, Community Bee Culture Project, Pro Pueblo Foundation, Ecuador

Onne van der Wal / Man with dividers doing chartwork in cabin aboard a yacht.

Wendy Shattil / Black-crested titmouse (Baeolophus atricristatus) in the hand, biologist from Texas Parks and Wildlife measuring beak length during bird ringing session. Southmost Preserve, The Nature Conservancy res...

Erik Russell / Chart table and instruments on board classic Victoria 34 Cutter, "Kipper". Solent, June 2008

Erwan Quéméré / Chart of La Rance River in Brittany, with compass, dividers and Breton Plotter.