A lion walks past a giraffe at the Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A group of elephants are seen at a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A group of elephants are seen near a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A group of elephants and giraffes walk near a carcass of an elephant at a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A group of elephants and giraffes walk near a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A group of elephants are seen at a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A group of elephants walk near a solar panel at a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A giraffe walks near a carcass of an elephant at a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A marabou stork stands on an elephant carcass at a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo TPX IMAGES OF THE DAY

A lion is seen approaching an elephant carcass at a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A lion is seen approaching an elephant carcass at a watering hole inside Hwange National Park, in Zimbabwe, October 23, 2019. REUTERS/Philimon Bulawayo

A leopard sits in the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A male cheetah rests in the Maasai Mara National Reserve, Kenya, October 15, 2019.REUTERS/Baz Ratner

A leopard walks through the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A leopard walks through the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A leopard walks through the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A leopard sits in the grass in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

A leopard walks past an elephant in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

A male lion lays near a female after mating in the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

A male lion stands over a female after mating in the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

Lions mate in the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

Four out of a pride of five male cheetahs are seen as they rest in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

Three out of a pride of five male cheetahs are seen in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner

An elephant walks through the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

Birds are seen on the back of a giraffe in the Maasai Mara National Reserve, Kenya, October 15, 2019. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

A male lion is seen in the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

Elephants walk through the Maasai Mara National Reserve, Kenya, October 15, 2019.REUTERS/Baz Ratner

Elephants walk through the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

Elephants walk through the Maasai Mara National Reserve, Kenya, October 14, 2019. Picture taken October 14, 2019. REUTERS/Baz Ratner

Giraffes are seen at the Nairobi National Park, near Nairobi, Kenya, December 3, 2018. REUTERS/Amir Cohen

The marked carcass of an elephant is seen, after reports that conservationists have discovered 87 of them slaughtered just in the last few months, in the Mababe area, Botswana, September 19, 2018. Picture taken September 19,2018. REUTERS/Siphiwe Sibeko

A herd of elephants is seen grazing at a wild life area, after reports that conservationists have discovered 87 of them slaughtered just in the last few months, outside Kasane in the northeastern corner of Botswana, September 20, 2018. REUTERS/Siphiwe Sibeko

An aerial photograph shows a herd of buffalo at a wild life area in Botswana, September 20, 2018. REUTERS/Siphiwe Sibeko

A herd of elephants is seen grazing at a wild life area, after reports that conservationists have discovered 87 of them slaughtered just in the last few months, outside Kasane in the northeastern corner of Botswana, September 20, 2018. REUTERS/Siphiwe Sibeko

A whirlwind is seen as elephant and zebras walk through the Amboseli National Park, Kenya August 19, 2018. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

Grevy's zebras, the most threatened species of zebra, graze at the Mpala research centre in Laikipia County, Kenya, January 7, 2018. Picture taken January 7, 2018. REUTERS/Baz Ratner

Grevy's zebras, the most threatened species of zebra, are seen at the Mpala research centre in Laikipia County, Kenya, January 6, 2018. Picture taken January 6, 2018. REUTERS/Baz Ratner

Grevy's zebras, the most threatened species of zebra, graze at the Mpala research centre in Laikipia County, Kenya, January 7, 2018. Picture taken January 7, 2018. REUTERS/Baz Ratner

A Grevy's zebra, the most threatened species of zebra, grazes at the Mpala research centre in Laikipia County, Kenya, January 7, 2018. Picture taken January 7, 2018. REUTERS/Baz Ratner

A Grevy's zebra, the most threatened species of zebra, grazes at the Mpala research centre in Laikipia County, Kenya, January 7, 2018. Picture taken January 7, 2018. REUTERS/Baz Ratner

Grevy's zebras, the most threatened species of zebra, graze at the Mpala research centre in Laikipia County, Kenya, January 7, 2018. Picture taken January 7, 2018. REUTERS/Baz Ratner

Elephants graze at the Mpala Research Centre in Laikipia County Kenya, January 7, 2018. REUTERS/Baz Ratner

A reticulated giraffe crosses a road near the Mpala Research Centre in Laikipia County Kenya, January 7, 2018. REUTERS/Baz Ratner

An elephant walks through the bush at the Mpala Research Centre in Laikipia County Kenya, January 7, 2018. REUTERS/Baz Ratner

An elephant and its calf walk through the bush at the Mpala Research Centre in Laikipia County Kenya, January 7, 2018. REUTERS/Baz Ratner

A Reticulated giraffe is seen at the Mpala research centre in Laikipia County Kenya, January 7, 2018. REUTERS/Baz Ratner

Reticulated giraffes graze at the Mpala Research Centre in Laikipia County Kenya, January 7, 2018. REUTERS/Baz Ratner

Hippos run into a river at the Mpala Research Centre in Laikipia County Kenya, January 7, 2018. REUTERS/Baz Ratner

Reticulated giraffes graze at the Mpala Research Centre in Laikipia County Kenya, January 7, 2018. REUTERS/Baz Ratner

Hippos splash water in a river at the Mpala Research Centre in Laikipia County Kenya, January 6, 2018. Picture taken January 6, 2018. REUTERS/Baz Ratner

An elephant and its calf walk through the bush at the Mpala Research Centre in Laikipia County, Kenya, January 7, 2018. REUTERS/Baz Ratner

Giraffes stand on a road in Mugui Conservancy, Kenya, February 12, 2017. REUTERS/Goran Tomasevic

A male elephant attempts to stand on its feet after it was fitted with an advanced satellite radio tracking collar to monitor their movement and control human-wildlife conflict near Mt. Kilimanjaro at the Amboseli National Park, in Kenya November 2, 2016. REUTERS/Thomas Mukoya TPX IMAGES OF THE DAY

Mount Kilimanjaro in the distance, as elephants walk in Amboseli National park January 26, 2015. REUTERS/Goran Tomasevic (KENYA - Tags: ENVIRONMENT ANIMALS TPX IMAGES OF THE DAY)

Elephants walk in Amboseli National park January 26, 2015. REUTERS/Goran Tomasevic (KENYA - Tags: ENVIRONMENT ANIMALS TPX IMAGES OF THE DAY)

A fisherman holds a stack of Bolivar notes after selling his catch to buyers, at a waterway on the plains near the Arauca river in El Yagual in the state of Apure November 4, 2014. Some inhabitants of Venezuela's savannah heartlands struggling to survive the national economic crisis have found a novel way to make ends meet - fish-smuggling to Colombia. While contraband of gasoline and medicine has been going on for years, little is known about the burgeoning trade in fresh-water fish by Venezuelans who pile tons onto motorised canoes and traverse dangerous waterways for days into Colombia. Picture taken on November 4, 2014. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: AGRICULTURE FOOD POLITICS SOCIETY)

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Fishermen navigate through waterways on the plains near the Arauca river in El Yagual in the state of Apure November 4, 2014. Some inhabitants of Venezuela's savannah heartlands struggling to survive the national economic crisis have found a novel way to make ends meet - fish-smuggling to Colombia. While contraband of gasoline and medicine has been going on for years, little is known about the burgeoning trade in fresh-water fish by Venezuelans who pile tons onto motorised canoes and traverse dangerous waterways for days into Colombia. Picture taken on November 4, 2014. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: AGRICULTURE FOOD POLITICS SOCIETY)

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Fishermen throw their nets on a waterway on the plains near the Arauca river in El Yagual at the state of Apure November 4, 2014. Some inhabitants of Venezuela's savannah heartlands struggling to survive the national economic crisis have found a novel way to make ends meet - fish-smuggling to Colombia. While contraband of gasoline and medicine has been going on for years, little is known about the burgeoning trade in fresh-water fish by Venezuelans who pile tons onto motorised canoes and traverse dangerous waterways for days into Colombia. Picture taken on November 4, 2014. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: AGRICULTURE FOOD POLITICS SOCIETY)

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A fisherman throws a net on a waterway on the plains near the Arauca river in El Yagual at the state of Apure November 4, 2014. Some inhabitants of Venezuela's savannah heartlands struggling to survive the national economic crisis have found a novel way to make ends meet - fish-smuggling to Colombia. While contraband of gasoline and medicine has been going on for years, little is known about the burgeoning trade in fresh-water fish by Venezuelans who pile tons onto motorised canoes and traverse dangerous waterways for days into Colombia. Picture taken on November 4, 2014. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: AGRICULTURE FOOD POLITICS SOCIETY TPX IMAGES OF THE DAY)

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Fishermen navigate along a waterway on the plains near the Arauca river in El Yagual at the state of Apure November 5, 2014. Some inhabitants of Venezuela's savannah heartlands struggling to survive the national economic crisis have found a novel way to make ends meet - fish-smuggling to Colombia. While contraband of gasoline and medicine has been going on for years, little is known about the burgeoning trade in fresh-water fish by Venezuelans who pile tons onto motorised canoes and traverse dangerous waterways for days into Colombia. Picture taken on November 5, 2014. REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: AGRICULTURE FOOD POLITICS SOCIETY TPX IMAGES OF THE DAY) ATTENTION EDITORS: PICTURE 04 26 FOR WIDER IMAGE PACKAGE 'FISH SMUGGLING IN VENEZUELA'

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