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.

Mark Hamblin / 2020VISION / Research scientists fitting satellite transmitter to Hen harrier chick (Circus cyaneus) for tracking movements after fledging. Glen Tanar Estate, Grampian, Scotland, UK, June 2011. Winner, documentary...

Nick Upton / 2020VISION / RSPB volunteers Jane Munstermann and Derek Stevenson observing and radio-tracking Common / Eurasian cranes (Grus grus) released by the Great Crane Project onto the Somerset Levels and moors, on a fogg...

Juergen Freund / Chambered nautilus (Nautilus pompilius) with radio transmitter, Indo-pacific

Juergen Freund / Richard Fitzpatrick releases Grey reef shark {Carcharhinus amblyrhynchos} after inserting transmitter into its belly, as part of the Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Richard Du Toit / Two Lionesses fitted with radio tracking collars {Panthera leo} Chobe NP, Botswana

Ann & Steve Toon / Remote tracking of Rhino patrols via digital radio, screenshot, Lewa Conservancy, Laikipia, Kenya, September 2012

Ann & Steve Toon / African elephants (Loxodonta africana) screen showing remote tracking via GPS radiocollars, screenshot, Lewa Conservancy, Laikipia, Kenya, September 2012

Ann & Steve Toon / Senior radio operator John Tanui, radio control room, Lewa Conservancy, Kenya, September 2012

Tony Heald / African Wild Dog (Lycaon pictus) wearing a radio collar, Mana Pools National Park, Zimbabwe, October 2012

Neil Aldridge / African wild dog (Lycaon pictus) adult male wearing a radio collar for research purposes, Venetia Limpopo Nature Reserve, South Africa, July 2009

Neil Aldridge / African wild dog (Lycaon pictus) adult wearing a radio collar for research purposes, Venetia Limpopo Nature Reserve, South Africa, July 2009

Mark Carwardine / Researcher radio-tracking endangered Kakapo (Strigops habroptila) Codfish Island, off Stewart Island, southern New Zealand, January 2009

Pete Oxford / White-taile Titi (Callicebus discolor) biologist, Amy Porter, radio tracking individual, Tiputini Biodiversity Station, adjacent to Yasuni National Park, Amazon Rainforest, Ecuador

Stephen Belcher / Kakapo (Strigops habroptilus) researchers tracking bird with radio telemetry, Codfish Island, New Zealand

Stephen Belcher / Kakapo (Strigops habroptilus) researcher tracking bird with radio telemetry, Codfish Island, New Zealand

Roland Seitre / Biologist Sandra Moreno tracking radio-tagged Spanish Imperial Eagles (Aquila adalberti). Cadix, Spain, January 2007.

Roland Seitre / Biologist Pepe Bueno using a radio antenna to track Iberian / Spanish Lynx (Lynx pardina), as part of a reintroduction program. Sierra de Andujar National Park, Andalusia, Spain, June 2006.

Roland Seitre / Antoine Cadi, scientist, and others radio tracking a tagged African spurred tortoise (Centrochelys / Geochelone sulcata) Sahel desert, Ferlo North Reserve, Senegal, West Africa, Vulnerable species. Fi...

Ann & Steve Toon / Red kite (Milvus milvus) fitted with radio transmitter just before release into the wild by the Forestry Commission, Grizedale, Cumbria, UK, August 2011. Captive.

Andy Rouse / Osprey (Pandion haliaetus) female 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.

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

Andy Rouse / Osprey (Pandion haliaetus) young male 'Einion' carrying fish while flying. The bird is wearing a radio tracker. Dyfi Estuary, Wales, August. It is the first time ospreys have bred at this lo...

Mark Hamblin / 2020VISION / Research scientists fitting satellite transmitter to Hen harrier chick (Circus cyaneus) for tracking movements after fledging, Glen Tanar Estate, Grampian, Scotland, UK, June 2011

Mark Hamblin / 2020VISION / Research scientists fitting satellite transmitter to Hen harrier chick (Circus cyaneus) for tracking movements after fledging, Glen Tanar Estate, Grampian, Scotland, UK, June 2011

Mark Hamblin / 2020VISION / Research scientists fitting satellite transmitter to Hen harrier chick (Circus cyaneus) for tracking movements after fledging, Glen Tanar Estate, Grampian, Scotland, UK, June 2011

Mark Hamblin / 2020VISION / Research scientists fitting satellite transmitter to Hen harrier chick (Circus cyaneus) for tracking movements after fledging, Glen Tanar Estate, Grampian, Scotland, UK, June 2011

Mark Hamblin / 2020VISION / Research scientists fitting satellite transmitter to Hen harrier chick (Circus cyaneus) for tracking movements after fledging, Glen Tanar Estate, Grampian, Scotland, UK, June 2011

Mark Hamblin / 2020VISION / Hen harrier chick (Circus cyaneus) in hand after ringing and fitting of satellite transmitter for tracking movements after fledging, Glen Tanar Estate, Grampian, Scotland, UK, June 2011

Mark Hamblin / 2020VISION / Hen harrier chick (Circus cyaneus) in hand after ringing and fitting of satellite transmitter for tracking movements after fledging, Glen Tanar Estate, Grampian, Scotland, UK, June 2011

Florian Möllers / Ilona Beermann carrying out radio telemetry of European Mink (Mustela lutreola). River Ilz, Saarland, Germany, August 2007.

Florian Möllers / Ilona Beermann carrying out radio telemetry of European Mink (Mustela lutreola). River Ilz, Saarland, Germany, August 2007.

Patricio Robles Gil / Male Jaguar (Panthera onca) swimming across the River Piquiri wearing a radio location collar. Parana, Southern Brazil.

Klaus Echle / Red Fox (Vulpes vulpes) running wearing a radio location tracking collar. Black Forest, Germany, August.

Klaus Echle / Red Fox (Vulpes vulpes) wearing a radio location tracking collar walking across a fallen tree trunk. Black Forest, Germany, August.

Klaus Echle / Red Fox (Vulpes vulpes) wearing a radio location tracking collar. Black Forest, Germany, August.

Klaus Echle / Red Fox (Vulpes vulpes) and person with radio tracking device / equipment. Black Forest, Germany, August.

Christian Ziegler / Radio transmitter on the back of a bat used by scientists to record its movements, Smithsonian Tropical Research Station, Barro Colorado Island, Panama

Eric Baccega / Polar Bear (Ursus maritimus) mother with her 3-month cub, soon after emerging from their hibernation den. The mother has a research radio-tracking collar on. Wapusk National Park, Manitoba, Canada, Ma...

Inaki Relanzon / Researcher radio tracking White collared / Grey-headed lemur (Eulemur cinereiceps) Manombo Forest Special Reserve, South east Madagascar, near Farafangana. Endangered species

Mark Carwardine / Radio-tracking Black rhinoceros (Diceros bicornis) Ol Pejeta Conservancy, Kenya, April 2007, No model release

Paul Hobson / Attaching radio tracker to tail of Northern Gannet (Morbus bassanus) Saltee Islands, Republic of Ireland.

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus albojubatu) collared to help with tracking and research. Masai Mara National Reserve, Kenya, September 2009

Michael Quinton / Gray Wolf (Canis lupus) alpha wearing tracking collar leading pack, Denali National Park, Alaska

Laurent Geslin / Radio collared Leopard (Panthera pardus) head portrait in profile, Chobe National Park, Khawai, Botswana, Southern Africa

Laurent Geslin / Radio collared Leopard (Panthera pardus) portrait standing, Chobe National Park, Khawai, Botswana, Southern Africa

Nick Upton / 2020VISION / RSPB volunteers Jane Munstermann and Derek Stevenson observing and radio-tracking Common / Eurasian cranes (Grus grus) released by the Great Crane Project onto the Somerset Levels and moors, on a fogg...

Nick Upton / 2020VISION / Six Juvenile Common / Eurasian cranes (Grus grus) recently released by the Great Crane Project, some with radiotransmitter aerials visible, flying over the Somerset Levels and Moors. Somerset, UK, Nov...

Nick Upton / 2020VISION / Common / Eurasian cranes (Grus grus) six juveniles in flight, recently released by the Great Crane Project, most wih radiotransmitter aerials visible, flying over the Somerset Levels and Moors. Somers...

Nick Upton / 2020VISION / Seven Juvenile Common / Eurasian cranes (Grus grus) in flight, recently released by the Great Crane Project, some with radiotransmitter aerials visible, Somerset, UK, November 2010.

Inaki Relanzon / Tracking system attached to a Ploughshare / Angonoka tortoise (Geochelone yniphora), one of the most endangered turttles in the world, Baie de Baly National Park, North west Madagascar.

Laurent Geslin / Red squirrel (Sciurus vulgaris) wearing radio tracking collar, as part of a conservation and research project, Parc des Sceaux, Paris, France.

Laurent Geslin / Red squirrel (Sciurus vulgaris) wearing radio tracking collar, as part of a conservation and research project, Parc de Sceaux, Paris, France.

Laurent Geslin / Red squirrel (Sciurus vulgaris) wearing a radio tracking collar, as part of a conservation and research project, Parc de Sceaux, Paris, France.

Laurent Geslin / Public information sign in Parc de Sceaux, Paris, France, depicting a Red squirrel (Sciurus vulgaris) and detailing the radio collar tracking reserach / conservation efforts there

Nick Upton / 2020VISION / RSPB volunteer Peter Broxholme radiotracking Common / Eurasian cranes (Grus grus) released by the Great Crane Project onto the Somerset Levels and Moors. Somerset, UK, October 2010. 2020VISION Book Pl...

Nick Upton / 2020VISION / Great Crane Project staff radiotracking Common / Eurasian cranes (Grus grus) recently released onto the Somerset Levels and Moors. Somerset, UK, October 2010.

Jeff Wilson / Cameraman Mark Smith using radio tracking equipment to track Snow leopard (Panthera uncia) Hindu Kush, Pakistan. For BBC Natural World programme on Snow Leopard, 2007

Lisa Hoffner / Conservation biologist and founder of the Proyecto Titi conservation programme Anne Savage radio tracking Cotton-top tamarins (Saguinus oedipus) in dry tropical forest of Colombia, South America IUCN...

Lisa Hoffner / Wild Cotton-top tamarin (Saguinus oedipus) wearing a radio-collar, climbing the trunk of a tree in dry tropical forest of Colombia, South America IUCN List: Critically Endangered

Pete Oxford / Spectacled bear (Tremarctos ornatus) sedated and carried by scientist, who will attach a radio collar. Andes Ecuador, South America

Pete Oxford / Spanish Lynx (Lynx pardinus) researcher, Leonardo Fernandez Pena, radio tracking, Donana National Park, Huelva, Andalusia, Spain

Pete Oxford / Spanish Lynx (Lynx pardinus) researcher, Leonardo Fernandez Pena, radio tracking cats, Donana National Park, Huelva, Andalusia, Spain

Pete Oxford / Spanish Lynx (Lynx pardinus) researcher radio tracking animals, Sierra de Andujar Natural Park, Andalusia, Spain

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) researcher Liu Bing radio tracking Xiang Xiang, the first captive raised panda released into the wild, Wolong Nature Reserve, endangered, China

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) researcher Liu Bing radio tracking Xiang Xiang, the first captive raised panda to be released into the wild, Wolong Nature Reserve, endangered, China

Suzi Eszterhas / Grevy's Zebra (Equus grevyi) biologist, Belinda Low of the Grevy's Zebra Trust uses radio telemetry to track the movements of zebras, Lewa Wildlife Conservation Area, northern Kenya

Wild Wonders of Europe / Arndt / Researcher Dr. Anna Pipia radio tracking Mouflon (Ovis musimon) for Wild Wonders of Europe project, Gennargentu National Park, Sardinia, Italy, November 2008

Wild Wonders of Europe / Arndt / Researcher Dr. Anna Pipia radio tracking Mouflon (Ovis musimon) for Wild Wonders of Europe project, Gennargentu National Park, Sardinia, Italy, November 2008

David Kjaer / Great Bustard {Otis tarda} shortly after release on Salisbury Plain, Wiltshire, UK. Part of a reintroduction program with birds imported as chicks from Russia 2007. note: satellite tracking transmitte...

Michael Durham / Allen's Big-eared Bat (Idionycteris phyllotis) reasearcher, Ben Solvesky, radio tracking female he had placed a transmitter on the night before, Arizona

Juergen Freund / Radio transmitter on blue marked Christmas Island red crab {Gecarcoidea natalis}. Christmas Is, Indian Ocean

Ingo Arndt / Common Seal (Phoca vitulina) with radio transmitter on its back, North Sea, Helgoland, Germany

Yva Momatiuk & John Eastcott / California Condor (Gymnogyps californianus) juvenile wearing a radio transmitter sitting on rocky cliff in autumn, one of a few born in the wild in Grand Canyon near Zion National Park, Utah

Yva Momatiuk & John Eastcott / California Condor (Gymnogyps californianus) adult spreading wings, critically endangered, bred in captivity and released wearing radio transmitters, they are the largest bird in North America with a 9...

Yva Momatiuk & John Eastcott / California Condor (Gymnogyps californianus) group of adults and juveniles, critically endangered, bred in captivity, later released wearing radio transmitters, interacting on rocky cliff in autumn, ne...

Yva Momatiuk & John Eastcott / California Condor (Gymnogyps californianus) group of adults and juveniles, critically endangered, bred in captivity, later released wearing radio transmitters, interacting on rocky cliff in autumn, ne...

Michael Durham / California Condor (Gymnogyps californianus) note the radio transmitter on the foreground wing, and a GPS transmitter with a solar charger on the other wing, Big Sur, California

Michael Durham / Oregon Division of Fish and Wildlife biologist Pat Matthews collects data on a newborn Elk (Cervus elaphus) calf in the Sled Springs Elk Study Area, the calf will be radio collared so that its movemen...

Michael Durham / American Elk (Cervus elaphus nelsoni) two day old calf is outfitted with a radio collar by biologist Scott Findholdt with the Oregon Department of Fish and Wildlife, Sled Springs Study Area, northeast...

Michael Durham / Bighorn Sheep (Ovis canadensis) ram with radio collar, Wallowa Mountains, Oregon

Pete Cairns / Dave Anderson, Forestry Commission conservation officer, radio-tracking pine martens to establish predation impact on red squirrels and tawny owls, Trossachs Forests District, Scotland. 2006

Anup Shah / Researchers tracking radio tagged Simien jackal / Ethiopian wolf {Canis simensis} Bale Mountains, Bale NP, Ethiopia December 2003

ASHISH & SHANTHI CHANDOLA / Research scientists implant radio tracking device in Smooth Indian Otter {Lutra perspicillata} India

HUGH WARWICK / BTCV volunteers radio tracking wolves in Bialowieza NP, Poland 1996

Owen Newman / Ju / Hoan bushmen with leopard {Panthera pardus} under sedation fitted with radio tracking collar, Namibia. 1996

Adam White / Komodo Dragon {Varanus komodoensis} with radio back-pack for scientific study, Komodo Island, Indonesia.

Adam White / Komodo Dragon {Varanus komodoensis} with radio back-pack for scientific study, Komodo Island, Indonesia.

Todd Pusser / Biologist Jeff Beane radio tracking a Pine gopher snake {Pituophis melanoleucus} North Carolina, USA.

Steven David Miller / Key deer {Odocoileus virginianus clavium} doe with radio tracking collar, USA.

Staffan Widstrand / European Lynx kittens held for microchip insertion, Stora Sjofallet NP. Sweden.

Eric Baccega / Rangers fit a radio tracking device on a female Black bear, Canada.

Eric Baccega / Rangers measuring a Black bear {Ursus americanus} paw, Canada. Parc National de la Mauricie, Canada.

Eric Baccega / Rangers attach a radio tracking collar to a Black bear {Ursus americanus}, Parc National de la Mauricie, Canada.

Eric Baccega / Ranger Denis Masse uses radio tracking device to find Black bears, Parc National de la Mauricie, Canada.

Andrew Parkinson / African wild dog group, one with radio collar {Lycaon pictus} Moremi GR, Botswana