Nick Upton / Captive reared juvenile White stork (Ciconia ciconia) with a GPS tracker on its back in flight over the Knepp Estate soon after release, Sussex, UK, August 2019.

Andy Rouse / Osprey (Pandion haliaetus) young male 'Einion' in flight. The bird is wearing a radio tracker. Dyfi Estuary, Wales, August. It is the first time ospreys have bred at this location for 400 years.

Karine Aigner / Argentine black and white tegu (Salvator merianae) caught in a trap set by the University of Florida, wearing a GPS tracker. Florida, USA. Invasive species.

Oriol Alamany / Tracker looking for Snow leopard (Panthera uncia) in a canyon near Kibber village, Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February 2017.

Oriol Alamany / Tracker looking with binoculars for Snow leopard (Panthera uncia) in Spiti valley, Cold Desert Biosphere Reserve, Himalaya mountains, Himachal Pradesh, India, February 2017.

Juan Carlos Munoz / Man tracking Iberian lynx (Lynx pardinus) using radio tracker. Spain, February.

Cyril Ruoso / Tracker working with wild Bonobos (Pan paniscus) on a habituation process, north of Bandundu Province, Democratic Republic of Congo (DRC)

Aflo / Japanese crested ibis (Nipponia nippon) with radio tracker attached to back, in the rain, Toyama Prefecture, Japan, October.

Ann & Steve Toon / Save the Rhino Trust camel camp patrol team members Hans Ganaseb (left) and Dansiekie Ganaseb (right), with SRT director of field operations Simson Uri-Khob, (centre) and camels, Kunene region, Namibi...

Ann & Steve Toon / Save the Rhino Trust camel camp patrol team, Hans Ganaseb and camels, Kunene region, Namibia, May 2013

Ann & Steve Toon / Save the Rhino Trust camel camp patrol team member Hans Ganaseb with camels, Kunene region, Namibia, May 2013

Ann & Steve Toon / Save the Rhino Trust camel camp patrol team members with camels, Kunene region, Namibia, May 2013