A view of the Sierra Nevada mountain range, a mountain range in the Western United States, is seen from a plane window in California, U.S., February 24, 2020. REUTERS/Shannon Stapleton 

Birds perch on one of the Colossi of Memnon, the ruins of two stone statues that guarded the mortuary temple built for Pharaoh Amenhotep III, in Luxor, Egypt November 25, 2018. REUTERS/Mohamed Abd El Ghany 

The Colossi of Memnon, the ruins of two stone statues that guarded the mortuary temple built for Pharaoh Amenhotep III, is seen in Luxor, Egypt November 25, 2018. REUTERS/Mohamed Abd El Ghany 

Birds perch on one of the Colossi of Memnon, the ruins of two stone statues that guarded the mortuary temple built for Pharaoh Amenhotep III, in Luxor, Egypt November 25, 2018. REUTERS/Mohamed Abd El Ghany 

A heron stands on a Chinampa or floating garden in Xochimilco on the outskirts of Mexico City, Mexico September 5, 2018. Picture taken September 5, 2018. REUTERS/Carlos Jasso 

A hunting Golden eagle is seen during a celebration by Egyptian clubs and austringers on World Falconry Day at Borg al-Arab desert in Alexandria, Egypt, November 17, 2018. Picture taken November 17, 2018. REUTERS/Amr Abdallah Dalsh 

A falcon eats a dove after hunting during a celebration by Egyptian clubs and austringers on World Falconry Day at Borg al-Arab desert in Alexandria, Egypt, November 17, 2018. Picture taken November 17, 2018. REUTERS/Amr Abdallah Dalsh 

A hunting falcon catches a hare during a celebration by Egyptian clubs and austringers on World Falconry Day at Borg al-Arab desert in Alexandria, Egypt, November 17, 2018. Picture taken November 17, 2018. REUTERS/Amr Abdallah Dalsh 

A hunting falcon catches a hare during a celebration by Egyptian clubs and austringers on World Falconry Day at Borg al-Arab desert in Alexandria, Egypt, November 17, 2018. Picture taken November 17, 2018. REUTERS/Amr Abdallah Dalsh 

A falcon flies after being released during a celebration by Egyptian clubs and austringers on World Falconry Day at Borg al-Arab desert in Alexandria, Egypt, November 17, 2018. Picture taken November 17, 2018. REUTERS/Amr Abdallah Dalsh 

A bird flies past a waxing gibbous moon, Bristol, Britain, November 18, 2018. REUTERS/Peter Cziborra 

A general view shows a construction site of Rogun hydroelectric power station on the Vakhsh River ahead of the launch of its first turbine, east of country's capital Dushanbe, Tajikistan November 14, 2018. Picture taken November 14, 2018. REUTERS/Nozim Kalandarov 

A general view shows the upper part of Europe's longest glacier, the Aletschgletscher, near Jungfraujoch, Switzerland November 16, 2018. REUTERS/Arnd Wiegmann 

A long exposure shows the fog-covered valley of the Aare River from Bruenigpass mountain road, Switzerland November 16, 2018. REUTERS/Arnd Wiegmann 

Bhanu, an Asiatic lion, rolls in leaves scented with cardamom, cinnamon and clove in his enclosure at London Zoo, London, Britain, October 18, 2018. REUTERS/Peter Nicholls TPX IMAGES OF THE DAY 

A deer stag barks in Richmond Park in London, Britain, October 7, 2018. REUTERS/Henry Nicholls 

A deer stag barks in Richmond Park in London, Britain, October 7, 2018. REUTERS/Henry Nicholls 

A deer stag stands in Richmond Park in London, Britain, October 7, 2018. REUTERS/Henry Nicholls 

Deer stand in Richmond Park in London, Britain, October 7, 2018. REUTERS/Henry Nicholls 

A stag deer stands in the bracken in Richmond Park in London, Britain, October 7, 2018. REUTERS/Henry Nicholls 

Two stag deer are seen in Richmond Park in London, Britain, October 7, 2018. REUTERS/Henry Nicholls 

Deer stand in the morning light in Richmond Park in London, Britain, October 7, 2018. REUTERS/Henry Nicholls 

Bavarian farmers transport their cows on a boat over the picturesque Lake Koenigssee, Germany, October 6, 2018. REUTERS/Michael Dalder 

The Grimsel and Furka Pass are pictured from the Rhone Glacier, Switzerland, September 13, 2018. Picture taken September 13, 2018. REUTERS/Denis Balibouse 

A tourist stands where the water leaves the Rhone Glacier in Furka, Switzerland, September 13, 2018. Picture taken September 13, 2018. REUTERS/Denis Balibouse 

Mont-Blanc mountain is pictured in Nyon, Switzerland, September 27, 2018. Picture taken September 27, 2018. REUTERS/Denis Balibouse 

The Bionnassay glacier is pictured near Chamonix, France, August 31, 2018. REUTERS/Denis Balibouse 

Mont-Blanc mountain is pictured in Nyon, Switzerland, September 27, 2018. Picture taken September 27, 2018. REUTERS/Denis Balibouse 

Mont-Blanc mountain is pictured with Lake Leman in Nyon, Switzerland, September 27, 2018. Picture taken September 27, 2018. REUTERS/Denis Balibouse 

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 male deer stands in a field in Republican landscape reserve "Nalibotsky" near the village of Kozliki, Belarus September 20, 2018. REUTERS/Vasily Fedosenko TPX IMAGES OF THE DAY 

A male deer stands in a field in Republican landscape reserve "Nalibotsky" near the village of Kozliki, Belarus September 20, 2018. REUTERS/Vasily Fedosenko 

A male deer roars in a field in Republican landscape reserve "Nalibotsky" near the village of Kozliki, Belarus September 20, 2018. REUTERS/Vasily Fedosenko 

A male deer stands in a field in Republican landscape reserve "Nalibotsky" near the village of Kozliki, Belarus September 20, 2018. REUTERS/Vasily Fedosenko 

A male deer rests in a field in Republican landscape reserve "Nalibotsky" near the village of Kozliki, Belarus September 20, 2018. REUTERS/Vasily Fedosenko 

A deer rests in the long grass during sunset in Dublin, Ireland, June 27, 2018. REUTERS/Clodagh Kilcoyne 

A deer rests in the long grass during sunset in Dublin, Ireland, June 27, 2018. REUTERS/Clodagh Kilcoyne 

A view of the Fuego volcano in San Miguel, Escuintla, Guatemala, June 8, 2018. REUTERS/Luis Echeverria 

People inspect an affected area after the eruption of the Fuego volcano in Escuintla, Guatemala, June 8, 2018. REUTERS/Carlos Jasso 

The Fuego volcano spews out a plume of ash and smoke as seen from El Rodeo in Escuintla, Guatemala June 8, 2018. REUTERS/Carlos Jasso 

Police officers observe a lahar flowing down from the Fuego volcano at El Rodeo in Escuintla, Guatemala June 8, 2018. REUTERS/Carlos Jasso 

A view of a lahar from the crater of the Fuego volcano is seen from El Rodeo in Escuintla, Guatemala June 8, 2018. REUTERS/Carlos Jasso 

A view of a lahar from the crater of the Fuego volcano is seen from Alotenango, Guatemala June 8, 2018. REUTERS/Jose Cabezas 

The Fuego volcano is seen from San Miguel Los Lotes in Escuintla, Guatemala June 7, 2018. REUTERS/Luis Echeverria 

The Fuego volcano is seen from San Miguel Los Lotes in Escuintla, Guatemala June 7, 2018. REUTERS/Luis Echeverria 

The Fuego volcano is seen from San Miguel Los Lotes in Escuintla, Guatemala June 7, 2018. REUTERS/Carlos Jasso 

The Fuego volcano is seen from San Miguel Los Lotes in Escuintla, Guatemala June 7, 2018. REUTERS/Carlos Jasso 

The Fuego volcano is seen from San Miguel Los Lotes in Escuintla, Guatemala June 7, 2018. REUTERS/Carlos Jasso 

Horses are seen during a wild horse show event in Duelmen, Germany, May 26, 2018. REUTERS/Leon Kuegeler 

Horses are seen during a wild horse show event in Duelmen, Germany, May 26, 2018. REUTERS/Leon Kuegeler 

Horses are seen during a wild horse show event in Duelmen, Germany, May 26, 2018. REUTERS/Leon Kuegeler 

Methane gas burns from the lava flow that crossed Kahukai St. in the Leilani Estates near Pahoa, Hawaii, U.S., May 25, 2018. REUTERS/Marco Garcia 

A tourist is seen at the beach as subtropical storm Alberto approaches Cancun, Mexico May 25, 2018. REUTERS/Israel Leal 

A general view shows an empty beach as subtropical storm Alberto approaches Cancun, Mexico May 25, 2018. REUTERS/Israel Leal 

The coast of the West Falkland, of the Falkland Islands, is seen from an airplane May 20, 2018. REUTERS/Marcos Brindicci 

Clouds are seen from an airplane as it flies over the Falkland Islands, May 20, 2018. REUTERS/Marcos Brindicci 

The coast of the West Falkland, of the Falkland Islands, is seen from an airplane May 20, 2018. REUTERS/Marcos Brindicci 

A monkey looks for eatables on the polluted banks of the Yamuna river next to the historic Taj Mahal in Agra, India, May 19, 2018. Picture taken May 19, 2018. REUTERS/Saumya Khandelwal