Cranes gather during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes gather during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun TPX IMAGES OF THE DAY 

Cranes fly during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes gather during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly above a lake during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun TPX IMAGES OF THE DAY 

Cranes gather during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly during the migration season at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

A cranes flies as others gather during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly above a lake during the migration season at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun TPX IMAGES OF THE DAY 

Cranes fly during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly during the migration season on a foggy morning at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly during the migration season at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly during the migration season at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

Cranes fly as the sun sets during the migration season at Hula Nature Reserve, in northern Israel November 17, 2020. Picture taken November 17, 2020. REUTERS/Ronen Zvulun 

The Wildstrubel mountain and the Plaine Morte glacier are pictured, days ahead federal elections, in Lenk, Switzerland October 14, 2019. Picture taken October 14, 2019. REUTERS/Denis Balibouse 

A white stork flies off a nest in front of a church's cross in Rust, Austria, April 16, 2019. REUTERS/Lisi Niesner 

White storks are seen inside their nest on a chimney above the rooftops in Rust, Austria, April 16, 2019. REUTERS/Lisi Niesner 

White storks are seen inside their nest on a chimney above the rooftops in Rust, Austria, April 16, 2019. REUTERS/Lisi Niesner 

White storks are seen inside their nest on a chimney above the rooftops in Rust, Austria, April 16, 2019. REUTERS/Lisi Niesner 

A view shows a church during a heavy snowfall in a settlement on the Pechora Sea island of Kolguyev in Nenets Autonomous District, Russia February 28, 2018. REUTERS/Sergei Karpukhin 

An aerial view shows the nomad camp of farmer Tanzurun Darisyu, located in Kara-Charyaa area south of Kyzyl town, the administrative centre of the Republic of Tuva (Tyva region) in Southern Siberia, Russia February 14, 2018. Picture taken February 14, 2018. REUTERS/Ilya Naymushin 

A murmuration of migrating starlings is seen across the sky near the village of Beit Kama in southern Israel January 16, 2018. REUTERS/Amir Cohen TPX IMAGES OF THE DAY 

A banner reading "No borders" is seen on the snow as demonstrators march from Claviere in Italy to Montgenevre in France to ask for open borders for migrants, January 14, 2018. REUTERS/Massimo Pinca 

Snow covers the beginning of a mountain pass from where migrants try to cross from Italy into France, near the town of Bardonecchia in northern Italy, December 19, 2017. REUTERS/Siegfried Modola SEARCH "MODOLA ALPS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A sign that warns of avalanche dangers protrudes from the snow on a mountain pass where migrants try to cross from Italy into France, near the town of Bardonecchia in northern Italy, December 20, 2017. REUTERS/Siegfried Modola SEARCH "MODOLA ALPS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Migrants walk through snow after crossing part of the Alps mountain range from Italy into France, near the town of Nevache in southeastern France, December 21, 2017. REUTERS/Siegfried Modola SEARCH "MODOLA ALPS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. 

Libyan migrants on a wooden boat await rescue by the migrant search and rescue vessel MV Seefuchs of the German NGO Sea-Eye in the search and rescue zone some fifty nautical miles north of the Tunisian-Libyan land border, September 30, 2017. REUTERS/Darrin Zammit Lupi TPX IMAGES OF THE DAY 

An animal carcass and an abandoned tent is seen in Rosebud camp in Cannon Ball, North Dakota, U.S., February 24, 2017. REUTERS/Stephen Yang 

Domed mud houses are covered in snow on a road to Aleppo through Homs, Syria January 29, 2017. Picture taken January 29, 2017. REUTERS/Ali Hashisho 

A border marker is seen at the U.S.-Canada border into Hemmingford, Quebec, Canada February 14, 2017. REUTERS/Christinne Muschi 

General view of the Vistytis town is seen near Russia border in Vistytis, Lithuania February 10, 2017. REUTERS/Kacper Pempel 

Car passes a road sign near the border with Russia in Vistytis town, Lithuania February 10, 2017. REUTERS/Kacper Pempel 

Polish and Russian border signs are seen on the border with Russia in Zytkiejmy, Poland February 9, 2017. REUTERS/Kacper Pempel 

A border guard opens a gate at a border crossing point with Russia in Goldap, Poland February 8, 2017. REUTERS/Kacper Pempel TPX IMAGES OF THE DAY 

Polish border guards walk near the border with Russia in Zytkiejmy, Poland February 8, 2017. REUTERS/Kacper Pempel 

A sign post for the small border town of Emerson, near the Canada-U.S border crossing where refugees make their way often on foot into the province, is seen in Emerson, Manitoba, Canada, February 1, 2017. REUTERS/Lyle Stafford 

Latvian and Russian border signs are seen in Lavosnieki, Latvia, January 29, 2017. REUTERS/Ints Kalnins 

A village sign is seen about 12 km (7,5 miles) from the border with Russia in Ziguri, Latvia, January 29, 2017. REUTERS/Ints Kalnins 

A fence on the border with Russia is seen in Katlesi, Latvia, January 29, 2017. REUTERS/Ints Kalnins 

A town sign is seen about 16 km (10 miles) from the border with Russia in Vilaka, Latvia, January 29, 2017. REUTERS/Ints Kalnins 

Latvian and Russian border signs are seen near Vecumi, Latvia, January 29, 2017. REUTERS/Ints Kalnins 

Mud houses are covered in snow on a road to Aleppo through Homs, Syria January 29, 2017. REUTERS/Ali Hashisho 

A child climbs a tree at the snow-covered refugee camp of the village of Vagiohori in northern Greece, January 13, 2017. REUTERS/Alexandros Avramidis 

Migrants walk during a snowfall inside a derelict customs warehouse in Belgrade, Serbia, January 11, 2017. REUTERS/Marko Djurica TPX IMAGES OF THE DAY 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Stranded Syrian refugees carry their children through a show storm at a refugee camp north of Athens, Greece January 10, 2017.REUTERS/Yannis Behrakis 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A stranded Syrian refugee child walks through a snowstorm at a refugee camp north of Athens, Greece January 10, 2017.REUTERS/Yannis Behrakis 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A banner reading: "Home is where your mom is" is attached to a tree as stranded Syrian refugee children walk through a snowstorm at a refugee camp north of Athens, Greece January 10, 2017.REUTERS/Yannis Behrakis 

A tent is seen at a makeshift camp in the transit zone on the Serbian-Hungarian border near Horgos, Serbia January 9, 2017. REUTERS/Bernadett Szabo 

A migrant carries a railway sleeper during a snowfall outside a derelict customs warehouse in Belgrade, Serbia January 9, 2017. REUTERS/Marko Djurica 

A girl carries clothes that were hung to dry during snowfall at a refugee camp in Ritsona, northern of Athens, Greece, December 30, 2016. REUTERS/Alkis Konstantinidis 

Migrating cranes fly over the Hula Lake Ornithology and Nature Park in northern Israel, which is a stopping point for hundreds of species of birds along their migration route between the northern and southern hemispheres during the cold season December 7, 2016. REUTERS/Baz Ratner 

Migrating cranes rest on the Hula Lake Ornithology and Nature Park in northern Israel, which is a stopping point for hundreds of species of birds along their migration route between the northern and southern hemispheres during the cold season December 7, 2016. REUTERS/Baz Ratner 

Migrating cranes rest on the Hula Lake Ornithology and Nature Park in northern Israel, which is a stopping point for hundreds of species of birds along their migration route between the northern and southern hemispheres during the cold season December 7, 2016. REUTERS/Baz Ratner 

Migrating cranes rest on the Hula Lake Ornithology and Nature Park in northern Israel, which is a stopping point for hundreds of species of birds along their migration route between the northern and southern hemispheres during the cold season December 7, 2016. REUTERS/Baz Ratner 

Migrating cranes rest on the Hula Lake Ornithology and Nature Park in northern Israel, which is a stopping point for hundreds of species of birds along their migration route between the northern and southern hemispheres during the cold season December 7, 2016. REUTERS/Baz Ratner 

Migrating cranes fly over the Hula Lake Ornithology and Nature Park in northern Israel, which is a stopping point for hundreds of species of birds along their migration route between the northern and southern hemispheres during the cold season December 7, 2016. REUTERS/Baz Ratner