A grey squirrel forages for spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel eats spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel eats spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel forages for spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel forages for spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel eats spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel forages for spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel eats spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel eats spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel balances along a thin twig to forage for spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

A grey squirrel forages for spring flower buds on a Japanese Maple tree at the National Botanic Gardens in Dublin, Ireland, March 23, 2021. REUTERS/Clodagh Kilcoyne

Visitors watch as sap from maple trees is boiled down into maple syrup in the evaporator in the sugar house at Hollis Hills Farm in Fitchburg, Massachusetts, U.S., March 13, 2021. REUTERS/Brian Snyder

Maple syrup is poured out of the evaporator in the sugar house at Hollis Hills Farm in Fitchburg, Massachusetts, U.S., March 13, 2021. REUTERS/Brian Snyder

Maple syrup is poured out of the evaporator in the sugar house at Hollis Hills Farm in Fitchburg, Massachusetts, U.S., March 13, 2021. REUTERS/Brian Snyder

Sap from a maple tree drips into a bucket to be boiled down into maple syrup at Hollis Hills Farm in Fitchburg, Massachusetts, U.S., March 13, 2021. REUTERS/Brian Snyder

Visitors watch as sap from maple trees is boiled down into maple syrup in the evaporator in the sugar house at Hollis Hills Farm in Fitchburg, Massachusetts, U.S., March 13, 2021. REUTERS/Brian Snyder

Jeong Sang-rok, a parcel delivery worker for Hanjin Transportation, pushes a trolley with a package past a red maple tree in Gwangju, South Korea, November 10, 2020. Picture taken November 10, 2020. REUTERS/Kim Hong-Ji REFILE - CORRECTING NAME OF COMPANY

Couple takes photographs of maple leaves on a late autumn day amid the COVID-19 pandemic at a park in Seoul, South Korea, November 13, 2020. REUTERS/Kim Hong-Ji

Women pose for photographs in front of maple leaves on a late autumn day amid the COVID-19 pandemic at a park in Seoul, South Korea, November 13, 2020. REUTERS/Kim Hong-Ji

One of the last red leaves on a maple tree is seen in autumn colours in Bourlon, France, November 3, 2020. REUTERS/Pascal Rossignol

One of the last red leaves on a maple tree is seen in autumn colours in Bourlon, France, November 3, 2020. REUTERS/Pascal Rossignol

Members of the Winnipeg Fire Paramedic Service wear personal protective gear as they depart Maples Personal Care Home, which is experiencing an outbreak of the coronavirus disease (COVID-19), in Winnipeg, Manitoba, Canada, November 2, 2020. REUTERS/Shannon VanRaes

Members of the Winnipeg Fire Paramedic Service wear personal protective gear as they depart Maples Personal Care Home, which is experiencing an outbreak of the coronavirus disease (COVID-19), in Winnipeg, Manitoba, Canada, November 2, 2020. REUTERS/Shannon VanRaes

A man wearing a mask and face shield walks past the Maples Personal Care Home, which is experiencing an outbreak of the coronavirus disease (COVID-19), in Winnipeg, Manitoba, Canada, November 2, 2020. REUTERS/Shannon VanRaes

A man wearing a mask and face shield walks past the Maples Personal Care Home, which is experiencing an outbreak of the coronavirus disease (COVID-19), in Winnipeg, Manitoba, Canada, November 2, 2020. REUTERS/Shannon VanRaes

Members of the Winnipeg Fire Paramedic Service wear personal protective gear as they depart Maples Personal Care Home, which is experiencing an outbreak of the coronavirus disease (COVID-19), in Winnipeg, Manitoba, Canada, November 2, 2020. REUTERS/Shannon VanRaes

Members of the Winnipeg Fire Paramedic Service remove personal protective gear after departing Maples Personal Care Home, which is experiencing an outbreak of the coronavirus disease (COVID-19), in Winnipeg, Manitoba, Canada, November 2, 2020. REUTERS/Shannon VanRaes

A view of Maple Leaf Dairy, one of the food producers in the area that employs many food workers, as rural hunger rises due to the coronavirus disease (COVID-19) in Manitowoc, Wisconsin, U.S. October 23, 2020. Picture taken October 23, 2020. REUTERS/Gabriela Bhaskar

A view of Maple Leaf Dairy, one of the food producers in the area that employs many food workers, as rural hunger rises due to the coronavirus disease (COVID-19) in Manitowoc, Wisconsin, U.S. October 23, 2020. Picture taken October 23, 2020. REUTERS/Gabriela Bhaskar

Grain elevators are seen at Maple River Grain & Agronomy, an agricultural co-op, as the coronavirus disease (COVID-19) outbreak continues in Casselton, North Dakota, U.S., October 25, 2020. Picture taken October 25, 2020. REUTERS/Bing Guan

Grain elevators are seen at Maple River Grain & Agronomy, an agricultural co-op, as the coronavirus disease (COVID-19) pandemic continues in Casselton, North Dakota, U.S., October 25, 2020. Picture taken October 25, 2020. REUTERS/Bing Guan

Red leaves are seen on a maple during the autumn season, in Bourlon, France, October 11, 2020. REUTERS/Pascal Rossignol

Red leaves are seen on a maple during the autumn season, in Bourlon, France, October 11, 2020. REUTERS/Pascal Rossignol

Red leaves are seen on a maple during the autumn season, in Bourlon, France, October 11, 2020. REUTERS/Pascal Rossignol

People sit in a car for an outdoor movie projection at the Maple Garden Drive-in Cinema, during Beijing International Film Festival following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

People wearing face masks sit in a car for an outdoor movie projection at the Maple Garden Drive-in Cinema, during Beijing International Film Festival following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

Cars line up to enter the Maple Garden Drive-in Cinema during Beijing International Film Festival, following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

A staff member holds a thermometer for temperature checks as he requires people to scan a health code at the entrance of the Maple Garden Drive-in Cinema, during Beijing International Film Festival following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

People sit in a Tesla car provided by the cinema for audience who do not have a car, at the Maple Garden Drive-in Cinema, during Beijing International Film Festival following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

People sit on chairs next to their car as they watch an outdoor movie projection at the Maple Garden Drive-in Cinema, during Beijing International Film Festival following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

A staff member checks people's health code as they enter the Maple Garden Drive-in Cinema for an outdoor movie projection during Beijing International Film Festival, following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

People sit in cars for an outdoor movie projection during Beijing International Film Festival at the Maple Garden Drive-in Cinema, following the coronavirus disease (COVID-19) outbreak, in Beijing, China August 24, 2020. REUTERS/Tingshu Wang

A Canadian maple leaf is seen on The Peace Bridge, which runs between Canada and the United States, over the Niagara River in Buffalo, New York, U.S. July 15, 2020. REUTERS/Brendan McDermid

Stephen and Terri Mitchelle (left) of Maple Ridge and their children, who live in Bellingham, gather for Mother's Day along the Canada-U.S. border, closed to non-essential travel due to coronavirus disease (COVID-19) restrictions, in Langley, British Columbia, Canada May 10, 2020. REUTERS/Jennifer Gauthier

A U.S. border patrol agent takes a photograph of the Lopez Borja family of Maple Ridge and Everett, Washington, along the Canada-U.S. border, closed to non-essential travel due to the coronavirus disease (COVID-19) restrictions as the family gathered for Mother's Day in Langley, British Columbia, Canada May 10, 2020. REUTERS/Jennifer Gauthier

A truck leaves the Maple Lodge Farms chicken processing plant after the company said one worker had died and 25 tested positive for the coronavirus disease (COVID-19) in Brampton, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

A truck moves a refrigerated trailer at the Maple Lodge Farms chicken processing plant after the company said one worker had died and 25 tested positive for the coronavirus disease (COVID-19) in Brampton, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

A sign instructs personnel to declare if they are at risk of infection, at the reception door of the Maple Lodge Farms chicken processing plant after the company said one worker had died and 25 tested positive for the coronavirus disease (COVID-19) in Brampton, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

A truck arrives at the Maple Lodge Farms chicken processing plant after the company said one worker had died and 25 tested positive for the coronavirus disease (COVID-19) in Brampton, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

A man wearing a face mask walks past the entry gate after the company said one worker had died and 25 tested positive for the coronavirus disease (COVID-19) at the Maple Lodge Farms chicken processing plant in Brampton, Ontario, Canada May 7, 2020. REUTERS/Chris Helgren

A man waves from a convoy of hearses after a repatriation ceremony for six Canadian military personnel killed in a helicopter crash in the Mediterranean, as they pass under a large Maple Leaf flag hanging from an overpass on the Highway 401 in Toronto, Ontario, Canada May 6, 2020. REUTERS/Chris Helgren

Jane Maples carries flowers at her florist as the spread of the coronavirus disease (COVID-19) continues. Hertford, Britain March 22, 2020 REUTERS/Andrew Couldridge

Men prepare the disks of maple wood during a traditional event to drive the winter out, in Ehrwald, Austria February 29, 2020. REUTERS/Angelika Warmuth

Men prepare disks of maple wood during a traditional event to drive the winter out, in Ehrwald, Austria February 29, 2020. REUTERS/Angelika Warmuth

A man holds disks of maple wood during a traditional event to drive the winter out, in Ehrwald, Austria February 29, 2020. REUTERS/Angelika Warmuth

Men prepare the burning disks of maple wood during a traditional event to drive the winter out, in Ehrwald, Austria February 29, 2020. REUTERS/Angelika Warmuth

Men throw burning disks of maple wood during a traditional event to drive the winter out, in Ehrwald, Austria February 29, 2020. REUTERS/Angelika Warmuth

Burning disks of maple wood lie in the fire during a traditional event to drive the winter out, in Ehrwald, Austria February 29, 2020. REUTERS/Angelika Warmuth

Burning disks of maple wood are thrown during a traditional event to drive the winter out, in Ehrwald, Austria February 29, 2020. REUTERS/Angelika Warmuth

Men throw burning disks of maple wood during a traditional event to drive the winter out, in Ehrwald, Austria February 29, 2020. REUTERS/Angelika Warmuth