Doug Gimesy / Gill nets placed in the Snowy river to capture, examine, take measurements and place tracking devices on Platypus (Ornithorhynchus anatinus) Snowy River, Jindabyne, NSW, Australia. September, 2017.

Doug Gimesy / Two researchers examine an anaesthetised Platypus (Ornithorhynchus anatinus) and start to glue a temporary radio transponder to its tail, allowing researchers to track its movements. Snowy River banks...

Doug Gimesy / Two researchers examine an anaesthetised platypus (Ornithorhynchus anatinus). Body measurements, blood, urine and DNA samples will be taken, and a temporary radio transponder could be glued to its t...

Doug Gimesy / Two researchers examine and take measurements from a young female platypus (Ornithorhynchus anatinus) Dalgety, NSW, Australia. September, 2017.Model released.

Eric Baccega / Western lowland gorilla (Gorilla gorilla gorilla) silverback male, portrait. Beauval Zoo Parc, France. Captive.

Doug Gimesy / Wildlife rescuers examine the remains of a dead Grey-headed flying-foxes (Pteropus poliocephalus) that was recovered in the field during a heat stress event at the Melbourne colony that day. Yarra Ben...

Doug Gimesy / Wildlife rescuers and Parks Victoria officer, Stephen Brend (top right) examine the remains of a dead Grey-headed Flying-foxes (Pteropus poliocephalus) that was recovered in the field during a heat st...

Clay Bolt / Natural history photographer Clay Bolt and writer Glen Chilton examine a termite mound while searching for Wallace's giant bee (Megachile pluto) Mollucas, Indonesia. January 2019

Ashley Cooper / Girl looking at Lions mane jellyfish (Cyanea capillata), washed ashore on a Nothumberland Beach, England, UK. July 2014

Suzi Eszterhas / American Beaver (Castor canadensis) wildlife rehabilitators, Jessie Lazaris and Jessie Paolello, examine one-month-old orphaned kit, Sarvey Wildlife Care Center, Arlington, Washington

Nick Upton / Linda Rennie sexing an adult Harvest mouse (Micromys minutus), one of a population being reared in captivity ahead of a reintroduction, Lifton, Devon, UK, May. Model released.

Ann & Steve Toon / Black rhinoceros horns (Diceros bicornis) at Glasgow Museums Resource Centre, awaiting DNA analysis.