One-horned rhinos rest on a highland in the flood affected area of Kaziranga National Park in Nagaon district, in the northeastern state of Assam, India, July 18, 2019. REUTERS/Anuwar Hazarika

One-horned rhinos take shelter at a highland in the flood affected area of Kaziranga National Park in Nagaon district, in the northeastern state of Assam, India, July 18, 2019. REUTERS/Anuwar Hazarika

An engineer uses a piece of wood to show how the tracking device developped by the Sigfox Foundation is inserted in a rhino horn, at French tech company Sigfox offices in Paris, France, December 7, 2018. The Sigfox Foundation develops small and affordable trackers for rhinoceroses that uses 'the internet of things' to transmit information in order to prevent poaching in game reserves. Picture taken December 7, 2018. REUTERS/Philippe Wojazer

Kenya Wildlife Service (KWS) personnel measure the horn of a tranquillised female black rhino before transporting it as part of a rhino translocation exercise In the Nairobi National Park, Kenya, June 26, 2018. REUTERS/Baz Ratner

Kenya Wildlife Service (KWS) personnel measure the horn of a tranquillised female black rhino before transporting it as part of a rhino translocation exercise In the Nairobi National Park, Kenya, June 26, 2018. REUTERS/Baz Ratner

Kenya Wildlife Service (KWS) personnel use a drill to place a tracker in the horn of a tranquillised female black rhino before transporting it as part of a rhino translocation exercise In the Nairobi National Park, Kenya, June 26, 2018. REUTERS/Baz Ratner

Former England cricketer Kevin Pietersen and Britain's Foreign Secretary Boris Johnson visit the ÒDead ShedÓ at Custom House in Heathrow Airport, to observe seized ivory and rhino horn, and other items relating to the illegal wildlife trade, in west London, Britain May 4, 2018. Andrew Matthews/Pool via Reuters

Former England cricketer Kevin Pietersen (UNSEEN) and Britain's Foreign Secretary Boris Johnson visit the ÒDead ShedÓ at Custom House in Heathrow Airport, to observe seized ivory and rhino horn, and other items relating to the illegal wildlife trade, in west London, Britain May 4, 2018. Andrew Matthews/Pool via Reuters

Former England cricketer Kevin Pietersen and Britain's Foreign Secretary Boris Johnson visit the ÒDead ShedÓ at Custom House in Heathrow Airport, to observe seized ivory and rhino horn, and other items relating to the illegal wildlife trade, in west London, Britain May 4, 2018. Andrew Matthews/Pool via Reuters

Former England cricketer Kevin Pietersen (UNSEEN) and Britain's Foreign Secretary Boris Johnson visit the ÒDead ShedÓ at Custom House in Heathrow Airport, to observe seized ivory and rhino horn, and other items relating to the illegal wildlife trade, in west London, Britain May 4, 2018. Andrew Matthews/Pool via Reuters

Former England cricketer Kevin Pietersen and Britain's Foreign Secretary Boris Johnson visit the ÒDead ShedÓ at Custom House in Heathrow Airport, to observe seized ivory and rhino horn, and other items relating to the illegal wildlife trade, in west London, Britain May 4, 2018. Andrew Matthews/Pool via Reuters

Former England cricketer Kevin Pietersen and Britain's Foreign Secretary Boris Johnson visit the ÒDead ShedÓ at Custom House in Heathrow Airport, to observe seized ivory and rhino horn, and other items relating to the illegal wildlife trade, in west London, Britain May 4, 2018. Andrew Matthews/Pool via Reuters

Forest officials ride an elephant as they count one-horned rhinoceros during a rhino census at the Kaziranga National Park, in Golaghat district, in the northeastern state of Assam, India March 26, 2018. REUTERS/Anuwar Hazarika

A one-horned rhinoceros is seen during a rhino census at the Kaziranga National Park, in Golaghat District, in the northeastern state of Assam, India, March 26, 2018. REUTERS/Anuwar Hazarika

A one-horned rhinoceros is seen during a rhino census at the Kaziranga National Park, in Golaghat District, in the northeastern state of Assam, India, March 26, 2018. REUTERS/Anuwar Hazarika

A worker measures a horn of a tranquillised rhino before dehorning it in an effort to deter the poaching of one of the world's endangered species, at a farm outside Klerksdorp, in the north west province, South Africa, August 14, 2017. Picture taken August 14, 2017. REUTERS/Siphiwe Sibeko

Kuala Lumpur International Airport (KLIA) customs director Hamzah Sundang (2nd R) poses with rhino horns that were seized on April 7 from Mozambique to Kuala Lumpur via Doha, during a news conference at the airport in Sepang, Malaysia April 10, 2017. REUTERS/Rozanna Latiff

A Thai customs officer displays seized rhino horns, coming from Ethiopia, during a news conference at the Suvarnabhumi International Airport in Bangkok, Thailand March 14, 2017. REUTERS/Athit Perawongmetha

Rhino horns are displayed during a news conference at the Suvarnabhumi International Airport in Bangkok, Thailand March 14, 2017. REUTERS/Athit Perawongmetha

Rhino horns are displayed during a news conference at the Suvarnabhumi International Airport in Bangkok, Thailand March 14, 2017. REUTERS/Athit Perawongmetha

White rhinoceros Bruno (R) and Gracie are seen in their enclosure at Thoiry zoo and wildlife park, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann TPX IMAGES OF THE DAY

White rhinoceros Bruno (R) and Gracie are seen in their enclosure at Thoiry zoo and wildlife park, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann

White rhinoceros Bruno (R) and Gracie are seen in their enclosure at Thoiry zoo and wildlife park, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann

The horn of white rhinoceros Bruno is seen in his enclosure at Thoiry zoo and wildlife park, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann

Thoiry zoo and wildlife park director Thierry Duguet poses near rhinoceros enclosure at the zoo, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann

Thoiry zoo and wildlife park director Thierry Duguet poses in front of white rhinoceros Gracie at the enclosure in the Thoiry zoo and wildlife park, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann

White rhinoceros Bruno is seen in his enclosure at Thoiry zoo and wildlife park, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann

White rhinoceros Bruno is seen in his enclosure at Thoiry zoo and wildlife park, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann

White rhinoceros Bruno (R) and Gracie are seen in their enclosure at Thoiry zoo and wildlife park, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann

White rhinoceros Bruno (R) and Gracie are seen in their enclosure at Thoiry zoo and wildlife park, about 50 km (30 miles) west of Paris, France, March 7, 2017. Poachers broke into the zoo last night, shot dead four-year-old male white rhino called Vince, and sawed off its horn in what is believed to be the first time in Europe that a rhino in captivity has been attacked and killed. REUTERS/Christian Hartmann TPX IMAGES OF THE DAY

Seized elephant ivory and rhino horns are destroyed by Vietnamese authorities in Hanoi November 12, 2016. Picture taken November 12, 2016. REUTERS/Nguyen Thanh Cao

Seized elephant ivory and rhino horns are destroyed by Vietnamese authorities in Hanoi November 12, 2016. Picture taken November 12, 2016. REUTERS/Nguyen Thanh Cao

Seized elephant ivory and rhino horns are seen before being destroyed by Vietnamese authorities in Hanoi November 12, 2016. Picture taken November 12, 2016. REUTERS/Nguyen Thanh Cao

Fire burns part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola/File Photo

A journalist walks past burning stocks of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

A man prepares to add fuel to the burning of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

Fire burns part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

Fire burns part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

Kenyan President Uhuru Kenyatta (right) and chairman of the Kenyan Wildlife Service (KWS) Richard Leakey (left) pose for the press after the president lit on fire parts of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

A Kenyan Wildlife Service (KWS) ranger walks past a burning part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

A man prepares to add fuel to the burning of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

Kenyan president Uhuru Kenyatta (centre) and chairman of the Kenyan Wildlife Service (KWS) Richard Leakey (left) pose for the press after the president lit on fire parts of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

Fire burns part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

Fire burns part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola TPX IMAGES OF THE DAY

A Kenyan Wildlife Service (KWS) ranger stands guard in the rain near stacks of elephant tusks, part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers to be burnt at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

A general view shows stacks of elephant tusks to be burnt, part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers to be burnt at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

A Kenya Wildlife Service (KWS) ranger holds the horn of a rhino, part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers to be burnt at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

A woman takes a picture with her mobile phone of stacks of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers to be burnt at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola

A Kenyan Wildlife Service (KWS) ranger stands guard in the rain near stacks of elephant tusks, part of an estimated 105 tonnes of ivory and a tonne of rhino horn confiscated from smugglers and poachers to be burnt at the Nairobi National Park near Nairobi, Kenya, April 30, 2016. REUTERS/Siegfried Modola TPX IMAGES OF THE DAY

A ranger gestures before performing a post mortem on a rhino after it was killed for its horn by poachers in South Africa's Kruger National Park, August 27, 2014. REUTERS/Siphiwe Sibeko/File Photo

A worker holds rhino horns after it was dehorned in an effort to deter the poaching of one of the world's endangered species, at a farm outside Klerksdorp, in the north west province, South Africa,February 24, 2016.REUTERS/Siphiwe Sibeko

Kenya Wildlife Services (KWS) rangers take Oath of Allegiance during the passing out parade for 592 rangers at the Law Enforcement Academy Manyani in Tsavo West National Park, October 27, 2015. Kenya Wildlife Services Law Enforcement Academy conducts training programs for uniformed personnel including general security courses for staff from institutions outside the wildlife conservation fraternity especially to combat poaching, KWS officials said. Poaching has surged in the last few years across sub-Saharan Africa, where gangs kill elephants and rhinos to feed Asian demand for ivory and horns for use in folk medicines. Kenya has imposed stiffer penalties -- longer jail terms and bigger fines -- for wildlife poaching or trafficking, saying poaching is harming tourism, a major earner of foreign exchange. REUTERS/Thomas Mukoya

Kenya Wildlife Services (KWS) rangers perform a silent drill during the passing out parade for 592 rangers at the Law Enforcement Academy Manyani in Tsavo West National Park, October 27, 2015. Kenya Wildlife Services Law Enforcement Academy conducts training programs for uniformed personnel including general security courses for staff from institutions outside the wildlife conservation fraternity especially to combat poaching, KWS officials said. Poaching has surged in the last few years across sub-Saharan Africa, where gangs kill elephants and rhinos to feed Asian demand for ivory and horns for use in folk medicines. Kenya has imposed stiffer penalties -- longer jail terms and bigger fines -- for wildlife poaching or trafficking, saying poaching is harming tourism, a major earner of foreign exchange. REUTERS/Thomas Mukoya

Kenya Wildlife Services (KWS) rangers perform a silent drill during the passing out parade for 592 rangers at the Law Enforcement Academy Manyani in Tsavo West National Park, October 27, 2015. Kenya Wildlife Services Law Enforcement Academy conducts training programs for uniformed personnel including general security courses for staff from institutions outside the wildlife conservation fraternity especially to combat poaching, KWS officials said. Poaching has surged in the last few years across sub-Saharan Africa, where gangs kill elephants and rhinos to feed Asian demand for ivory and horns for use in folk medicines. Kenya has imposed stiffer penalties -- longer jail terms and bigger fines -- for wildlife poaching or trafficking, saying poaching is harming tourism, a major earner of foreign exchange. REUTERS/Thomas Mukoya

Kenya Wildlife Services (KWS) rangers perform a silent drill during the passing out parade for 592 rangers at the Law Enforcement Academy Manyani in Tsavo West National Park, October 27, 2015. Kenya Wildlife Services Law Enforcement Academy conducts training programs for uniformed personnel including general security courses for staff from institutions outside the wildlife conservation fraternity especially to combat poaching, KWS officials said. Poaching has surged in the last few years across sub-Saharan Africa, where gangs kill elephants and rhinos to feed Asian demand for ivory and horns for use in folk medicines. Kenya has imposed stiffer penalties -- longer jail terms and bigger fines -- for wildlife poaching or trafficking, saying poaching is harming tourism, a major earner of foreign exchange. REUTERS/Thomas Mukoya

Kenya Wildlife Services (KWS) rangers parade during the passing out parade for 592 rangers at the Law Enforcement Academy Manyani in Tsavo West National Park, October 27, 2015. Kenya Wildlife Services Law Enforcement Academy conducts training programs for uniformed personnel including general security courses for staff from institutions outside the wildlife conservation fraternity especially to combat poaching, KWS officials said. Poaching has surged in the last few years across sub-Saharan Africa, where gangs kill elephants and rhinos to feed Asian demand for ivory and horns for use in folk medicines. Kenya has imposed stiffer penalties -- longer jail terms and bigger fines -- for wildlife poaching or trafficking, saying poaching is harming tourism, a major earner of foreign exchange. REUTERS/Thomas Mukoya

Kenya Wildlife Services (KWS) rangers parade during the passing out parade for 592 rangers at the Law Enforcement Academy Manyani in Tsavo West National Park, October 27, 2015. Kenya Wildlife Services Law Enforcement Academy conducts training programs for uniformed personnel including general security courses for staff from institutions outside the wildlife conservation fraternity especially to combat poaching, KWS officials said. Poaching has surged in the last few years across sub-Saharan Africa, where gangs kill elephants and rhinos to feed Asian demand for ivory and horns for use in folk medicines. Kenya has imposed stiffer penalties -- longer jail terms and bigger fines -- for wildlife poaching or trafficking, saying poaching is harming tourism, a major earner of foreign exchange. REUTERS/Thomas Mukoya

Kenya Wildlife Services (KWS) rangers perform a silent drill during the passing out parade for 592 rangers at the Law Enforcement Academy Manyani in Tsavo West National Park, October 27, 2015. Kenya Wildlife Services Law Enforcement Academy conducts training programs for uniformed personnel including general security courses for staff from institutions outside the wildlife conservation fraternity especially to combat poaching, KWS officials said. Poaching has surged in the last few years across sub-Saharan Africa, where gangs kill elephants and rhinos to feed Asian demand for ivory and horns for use in folk medicines. Kenya has imposed stiffer penalties -- longer jail terms and bigger fines -- for wildlife poaching or trafficking, saying poaching is harming tourism, a major earner of foreign exchange. REUTERS/Thomas Mukoya