Terry Whittaker / Water vole (Arvicola amphibius) being anaesthetised for health check, prior to release into the wild. Head Vet Nurse Leasa Neame and Vet Nurse Laura Wilson check the vole's heart rate and warm its tai...

Eric Baccega / Veterinarian taking a blood sample from female Orangutan (Pongo pygmaeus) under anaesthetic, before a check with an MRI scanner, Beauval Zoo, France, October 2017.

Doug Perrine / Volunteers restraining a recently weaned male Hawaiian monk seal (Neomonachus schauinslandi) while Marine Mammal Center veterinarian Michelle Barbiers takes a blood sample prior to tagging. Keokea Bea...

SCOTLAND: The Big Picture / Vet from The Royal Zoological Society Scotland / RZSS taking a blood sample from a sedated Scottish wildcat (Felis silvestris grampia) male. Inside RZSS mobile vet unit, Strathsprey, Cairngorms Nation...

SCOTLAND: The Big Picture / Veterinarian from The Royal Zoological Society Scotland / RZSS with blood sample from Scottish wildcat (Felis silvestris grampia). To be used for genetic testing. Inside RZSS mobile vet unit, Strathsp...

Nick Upton / British Divers Marine Life Rescue (BDMLR) vet Darryl Thorpe takes a blood sample from an injured grey seal pup (Halichoerus grypus) 'Jenga', at BDMLR seal pup treatment facility before its transfer to...

Nick Upton / British Divers Marine Life Rescue vet Darryl Thorpe taking a blood sample from an injured grey seal pup (Halichoerus grypus) 'Jenga' in a cubicle at a BDMLR seal pup treatment facility before its tran...

Suzi Eszterhas / Sea Otter (Enhydra lutris) stranding supervisor, Halley Werner, taking blood sample from three week old orphaned pup, Alaska SeaLife Center, Seward, Alaska

Nick Upton / Veterinarian Romain Pizzi of the Royal Zoological Society of Scotland taking a blood sample from the tail of an Eurasian beaver (Castor fiber). Beaver from an escaped population on the Otter River. Pr...

Sam Hobson / Blood sample collected by scientists working with urban goshawks (Accipiter gentilis). Berlin, Germany. May 2014.

Sam Hobson / Blood samples collected by scientists working with urban goshawks (Accipiter gentilis). Berlin, Germany. May 2014.

Jabruson / People in biohazard suits taking blood sample from bat, in search for the reservoir host of Ebola virus. Ebola Virus Disease killed 128 people in 2003 in Mbomo and in 2005 killed 95% of Odzala Nationa...