Birds forage in Paris, France, April 6, 2020. France has imposed a two-week nationwide lockdown on March 17, and it was extended to April 15. Under a lockdown, people have been forced to stay at home, except for trips for purposes of work, health needs or shopping of necessities. (Photo by Aurelien Morissard/Xinhua)

A duck is seen in a street in Paris, France, April 6, 2020. France has imposed a two-week nationwide lockdown on March 17, and it was extended to April 15. Under a lockdown, people have been forced to stay at home, except for trips for purposes of work, health needs or shopping of necessities. (Photo by Aurelien Morissard/Xinhua)

A duck is seen in a street in Paris, France, April 6, 2020. France has imposed a two-week nationwide lockdown on March 17, and it was extended to April 15. Under a lockdown, people have been forced to stay at home, except for trips for purposes of work, health needs or shopping of necessities. (Photo by Aurelien Morissard/Xinhua)

A jogger runs past a duck in Paris, France, April 6, 2020. France has imposed a two-week nationwide lockdown on March 17, and it was extended to April 15. Under a lockdown, people have been forced to stay at home, except for trips for purposes of work, health needs or shopping of necessities. (Photo by Aurelien Morissard/Xinhua)

Crows rest on a statue in Paris, France on April 6, 2020 France has imposed a two-week nationwide lockdown on March 17, and it was extended to April 15. Under a lockdown, people have been forced to stay at home, except for trips for purposes of work, health needs or shopping of necessities. (Photo by Aurelien Morissard/Xinhua)