A man sings and plays the accordion next to his dog on the embankment of the Tom River after the beginning of an ice drift in the Siberian city of Tomsk, Russia April 17, 2021. REUTERS/Taisiya Vorontsova

Seagulls fly over the field as a farmer plants potatoes in Tilloy-lez-Cambrai, near Cambrai, France, April 17, 2021. REUTERS/Pascal Rossignol

The brass clock given to Britain's Prince Philip by the Queen's Royal Irish Hussars in 1978, to mark 25 years as Colonel-in-Chief, mounted in the front of his driving carriage is pictured ahead of tomorrow's funeral procession at Windsor Castle, Berkshire, Britain April 14, 2021. Picture taken April 14, 2021. Steve Parsons/PA Wire/Pool via REUTERS

Britain's Prince Philip's driving carriage and his two Fell ponies, Balmoral Nevis and Notlaw Storm, are pictured ahead of tomorrow's funeral procession at Windsor Castle, Berkshire, Britain April 14, 2021. Picture taken April 14, 2021. Steve Parsons/PA Wire/Pool via REUTERS

Britain's Prince Philip's driving carriage and his two Fell ponies, Balmoral Nevis and Notlaw Storm, are pictured ahead of tomorrow's funeral procession at Windsor Castle, Berkshire, Britain April 14, 2021. Picture taken April 14, 2021. Steve Parsons/PA Wire/Pool via REUTERS

Britain's Prince Philip's driving carriage and his two Fell ponies, Balmoral Nevis and Notlaw Storm, are pictured ahead of tomorrow's funeral procession at Windsor Castle, Berkshire, Britain April 14, 2021. Picture taken April 14, 2021. Steve Parsons/PA Wire/Pool via REUTERS

A cat cleans itself at Ayasofya-i Kebir Camii or Hagia Sophia Grand Mosque on the first Friday of the holy fasting month of Ramadan, amid the coronavirus disease (COVID-19) pandemic, in Istanbul, Turkey April 16, 2021. REUTERS/Murad Sezer

A squirrel eats a nut at a public garden in Cambrai, France, April 16, 2021. REUTERS/Pascal Rossignol

A squirrel eats a nut at the public garden in Cambrai, France, April 16, 2021. REUTERS/Pascal Rossignol

Bengal tiger Garfield reacts at the zoo in Havana, Cuba, April 14, 2021. Picture taken on April 14, 2021. REUTERS/Alexandre Meneghini

A white bengal tiger cub is seen beside its mother at the zoo in Havana, Cuba, April 14, 2021. Picture taken on April 14, 2021. REUTERS/Alexandre Meneghini

Bengal tiger Garfield interacts with zoo keeper Angel Cordero at the zoo in Havana, Cuba, April 14, 2021. Picture taken on April 14, 2021. REUTERS/Alexandre Meneghini

Bengal tiger Garfield reacts at the zoo in Havana, Cuba, April 14, 2021. Picture taken on April 14, 2021. REUTERS/Alexandre Meneghini TPX IMAGES OF THE DAY

A white bengal tiger cub is seen inside a cage at the zoo in Havana, Cuba, April 14, 2021. Picture taken on April 14, 2021. REUTERS/Alexandre Meneghini

Bengal tiger Garfield interacts with zoo keeper Angel Cordero at the zoo in Havana, Cuba, April 14, 2021. Picture taken on April 14, 2021. REUTERS/Alexandre Meneghini

Bengal tiger Fiona reacts while feeding its cubs at the zoo in Havana, Cuba, April 14, 2021. Picture taken on April 14, 2021. REUTERS/Alexandre Meneghini

The skeleton of a Tyrannosaurus rex, the large meat-eating dinosaur that lived in western North America and went extinct 66 million years ago, is displayed at the Smithsonian National Museum of Natural History in Washington, U.S. June 16, 2019. Picture taken June 16, 2019. REUTERS/Will Dunham

A pigeon sits on the shoulder of a woman in St. James's Park, in London Britain April 15, 2021 REUTERS/Tom Nicholson TPX IMAGES OF THE DAY

A man feeds a bird at St. James's Park, in London Britain April 15, 2021 REUTERS/Tom Nicholson

A service member of the Ukrainian armed forces holds a kitten while speaking with his comrades at fighting positions on the line of separation near the rebel-controlled city of Donetsk, Ukraine April 15, 2021. REUTERS/Serhiy Takhmazov

A squirrel climbs a tree at the public garden in Cambrai, France, April 15, 2021. REUTERS/Pascal Rossignol

A squirrel stands up on the grass at the public garden in Cambrai, France, April 15, 2021. REUTERS/Pascal Rossignol

A squirrel climbs a tree at the public garden in Cambrai, France, April 15, 2021. REUTERS/Pascal Rossignol

A squirrel climbs a tree at the public garden in Cambrai, France, April 15, 2021. REUTERS/Pascal Rossignol

A dog barks as patients (not pictured) arrive early in the morning to be treated by healer Jorge Goliat in Havana, Cuba, April 13, 2021. Picture taken on April 13, 2021. REUTERS/Alexandre Meneghini

Valerie Chicola, a staffer on Capitol Hill pets Officer Clarence, a Saint Bernard from the Greenfield, Massachusetts police department, April 14, 2021. Officer Clarence is the first official police comfort dog and he specializes in helping first responders in the aftermath of critical incidents. He came to Washington to support police officers and others during the tribute to slain Capitol Police officer William Evans. REUTERS/Evelyn Hockstein

Valerie Chicola, a staffer on Capitol Hill pets Officer Clarence, a Saint Bernard from the Greenfield, Massachusetts police department, April 14, 2021. Officer Clarence is the first official police comfort dog and he specializes in helping first responders in the aftermath of critical incidents. He came to Washington to support police officers and others during the tribute to slain Capitol Police officer William Evans. REUTERS/Evelyn Hockstein TPX IMAGES OF THE DAY

A road sign depicting a frog is seen on a closed road section in Tallinn, Estonia April 13, 2021. Picture taken on April 13, 2021. REUTERS/Janis Laizans

A road sign depicting a frog is seen on a closed road section in Tallinn, Estonia April 13, 2021. Picture taken on April 13, 2021. REUTERS/Janis Laizans

A toad is pictured on the road in Tallinn, Estonia April 13, 2021. Picture taken on April 13, 2021. REUTERS/Janis Laizans

A toad is pictured on the road in Tallinn, Estonia April 13, 2021. Picture taken on April 13, 2021. REUTERS/Janis Laizans

A toad is pictured on the road in Tallinn, Estonia April 13, 2021. Picture taken on April 13, 2021. REUTERS/Janis Laizans

A toad is pictured on the road in Tallinn, Estonia April 13, 2021. Picture taken on April 13, 2021. REUTERS/Janis Laizans

Horses stand in a field early in the morning in Vertou, France, April 14, 2021. REUTERS/Stephane Mahe

Storks are seen on a nest built on top of a mosque near the north Aegean town of Biga in Canakkale province, Turkey April 13, 2021. REUTERS/Yoruk Isik

Storks are seen on a nest built on top of a mosque near the north Aegean town of Biga in Canakkale province, Turkey April 13, 2021. REUTERS/Yoruk Isik

A grey heron is seen at the Sempione park, after Lombardy was downgraded from a red to an orange zone, loosening the coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open, in Milan, Italy, April 13, 2021. REUTERS/Flavio Lo Scalzo

Boxers train at the Sempione park, after Lombardy was downgraded from a red to an orange zone, loosening the coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open, in Milan, Italy, April 13, 2021. REUTERS/Flavio Lo Scalzo

People exercise near a grey heron at the Sempione park, after Lombardy was downgraded from a red to an orange zone, loosening the coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open, in Milan, Italy, April 13, 2021. REUTERS/Flavio Lo Scalzo

A grey heron is seen at the Sempione park, after Lombardy was downgraded from a red to an orange zone, loosening the coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open, in Milan, Italy, April 13, 2021. REUTERS/Flavio Lo Scalzo TPX IMAGES OF THE DAY

A man wearing a face mask takes a rest near a grey heron at the Sempione park, after Lombardy was downgraded from a red to an orange zone, loosening the coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open, in Milan, Italy, April 13, 2021. REUTERS/Flavio Lo Scalzo

A grey heron is seen at the Sempione park, after Lombardy was downgraded from a red to an orange zone, loosening the coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open, in Milan, Italy, April 13, 2021. REUTERS/Flavio Lo Scalzo

A grey heron is seen at the Sempione park, after Lombardy was downgraded from a red to an orange zone, loosening the coronavirus disease (COVID-19) restrictions including allowing non-essential shops to re-open, in Milan, Italy, April 13, 2021. REUTERS/Flavio Lo Scalzo

A pet bird which belongs to a bodybuilder is seen in a room next to a gym which has been turned from a bicycle shed inside a residential compound in the southwest of Beijing, China April 8, 2021. Picture taken April 8, 2021. REUTERS/Tingshu Wang

A goat looks out a window at an artisanal fishing hub, at Hann Bay on the eastern edge of Dakar, Senegal, April 12, 2021.REUTERS/Zohra Bensemra

A man plays violin next to a duck on a pedestrian street during the coronavirus disease (COVID-19) pandemic, in Santiago, Chile April 12, 2021. REUTERS/Ivan Alvarado

A child looks at a polar bear inside its enclosure at re-opened Prague Zoo, as coronavirus disease (COVID-19) restrictions ease, in Prague, Czech Republic, April 12, 2021. REUTERS/David W Cerny

Animator dressed as a cosmonaut performs on the eve of Cosmonautics Day in Krasnogorsk, Moscow region, Russia April 11, 2021. REUTERS/Evgenia Novozhenina

Animators dressed as astronauts pose on the eve of Cosmonautics Day in Krasnogorsk, Moscow region, Russia April 11, 2021. REUTERS/Evgenia Novozhenina

Lions are seen at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

A North American timber wolf is seen at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

An American black bear cub is seen at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

A North American timber wolf is seen at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

An American black bear cub is seen at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

An American black bear cub is seen at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

A young lion plays with a ball at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

A lion cub yawns at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

A young lion is seen at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

A lion is seen at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers

Lion cubs play at Woburn Safari park before its opening as coronavirus disease (COVID-19) restrictions begin to ease, in Woburn, Britain April 11, 2021. REUTERS/Andrew Boyers