Lisa Hoffner / Hungry orphan elephants (Loxodonta africana) greet the milk delivery trailer. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, April 2007. Model released

Carol Walker / Wild horse / mustang called Mica, rounded up from Adobe Town Herd Management Area in Wyoming and adopted by photographer Carol Walker. Being led out of his trailer by trainer Rich Scott, arriving at C...

Gary K. Smith / Mechanised lifting of sugar beet crop with self propelled harvester filling trailer with harvested roots, with black headed gull flock (Chroicoephalus ridibundus) flying around, North Norfolk, England...

Pat Tuson / Delivery bicycle with trailer, Mother Earth shop, Newington Green, London Borough of Islington, UK

Gary K. Smith / UK farming, commercial potato growing, tractor with potato planter being refilled from trailer, tractors with stone picking machines in distance, Norfolk, UK, May

Paul Harris / 2020VISION / Combining Oats - grain pouring from harvester into trailer - Haregill Lodge Farm, Ellingstring, North Yorkshire, England, UK, August.

Carol Walker / Palomino Wild horse / mustang colt Mica adopted from the Adobe Town herd, Wyoming, learning to enter a trailer, Colorado, USA, May 2011

Carol Walker / Carol Walker with her male cremello Wild horse / mustang colt Claro that had been rounded up from the McCullough Peak herd, Wyoming, and put up for adoption, Colorado, USA, August 2011, model released

Mark Hamblin / 2020VISION / Bales of Barley straw on trailer, Scotland, UK, September

Onne van der Wal / Small sailing-boat on a trailer covered in thick snow. Mount Tremblant, Quebec, Canada, 2008.

Ernie Janes / Combine harvester loading trailer with Wheat, Bedfordshire, UK, August 2006

Ernie Janes / View of Combine harvester harvesting field of Wheat from trailer, Bedfordshire, UK, August 2006

Ernie Janes / View of Combine harvester harvesting field of Wheat from trailer, Bedfordshire, UK, August 2006

Ernie Janes / Combine harvester harvesting field of Wheat, emptying harvest into trailer, Bedfordshire, UK, August 2006

Ernie Janes / Trailer collecting wheat from combine harvester, Bedfordshire, UK, August 2006

Ernie Janes / Sugar beet (Beta vulagaris) crop being harvested, unloading beets into trailer, Norfolk, UK, January 2009

Ernie Janes / Sugar beet (Beta vulagaris) crop, unloading beets from trailer, Norfolk, UK, January 2009

Ernie Janes / Harvesting crop of Oil seed rape with combine harvester and trailer, Norfolk, UK

Ernie Janes / Harvesting crop of Oil seed rape with combine harvester and trailer, Norfolk, UK

Ernie Janes / Tractor and trailer at shoreline waiting to collect crabbing boat, Cromer, UK

Ernie Janes / Barley harvest, barley grains emptied from combine harvester into waiting trailer, Norfolk, UK, August

Carol Walker / Grey Mustang / Wild horse colt foal Mica, rounded up from the Adobe Town herd, Wyoming, and adopted by the photographer, being led into trailer by trainer Rich Scott, Colorado, USA, February 2011, mod...

Juan Carlos Munoz / Baskets of harvested olives (Olea europaea) being taken away on a trailer in Sierra de Andujar Natural Park. Andalusia, Spain, Feb 2010

Nick Upton / Hay being loaded onto tractor and trailer with a pitchfork, with Picos d'Europa mountains in the background, near Ribadesella, Asturias, Spain. July 2009

Wild Wonders of Europe / Benvie / Wood on tractor trailer ready for processing into charcoal, Cartaya, Andalucia, Spain, April 2009

Adrian Davies / Mobile Air quality monitoring trailer beside a road in Richmond, London, UK

Adrian Davies / Mobile Air quality monitoring unit beside a road in Richmond, London, UK

Ross Hoddinott / Lichen (Xanthoria parientina) growing on paint of tractor trailer. Devon, UK.

Ross Hoddinott / Lichen (Xanthoria parientina) growing on paint of tractor trailer. Devon, UK.

Onne van der Wal / A yacht being transported overland on a trailer pulled by a red jeep, Cape Cod, Massachusetts, USA.

Onne van der Wal / 4x4 car hauling a beetlecat dinghy out of the water.

Onne van der Wal / Red jeep towing a yacht on a trailer.

Onne van der Wal / Viper dinghy hauled out a on trailer behind SUV.

Onne van der Wal / A yacht being transported overland on a trailer pulled by a red jeep, Cape Cod, Massachusetts, USA.