A geese flies over the river where people punt as coronavirus disease (COVID-19) restrictions are eased in Cambridge, Britain May 12, 2021. REUTERS/Andrew Couldridge

People punt on the river as coronavirus disease (COVID-19) restrictions are eased in Cambridge, Britain May 12, 2021. REUTERS/Andrew Couldridge

People punt on the river as coronavirus disease (COVID-19) restrictions are eased in Cambridge, Britain May 12, 2021. REUTERS/Andrew Couldridge

People punt on the river as coronavirus disease (COVID-19) restrictions are eased in Cambridge, Britain May 12, 2021. REUTERS/Andrew Couldridge

Asylum-seeking migrants are seen after crossing the Rio Bravo river to turn themselves in to U.S. Border Patrol agents to request for asylum in El Paso, Texas, U.S., as seen from Ciudad Juarez, Mexico May 11, 2021. REUTERS/Jose Luis Gonzalez

An asylum-seeking migrant is seen after crossing the Rio Bravo river to turn herself in to U.S. Border Patrol agents to request for asylum in El Paso, Texas, U.S., as seen from Ciudad Juarez, Mexico May 11, 2021. REUTERS/Jose Luis Gonzalez

An asylum-seeking migrant from Honduras and her daughter are seen before crossing the Rio Bravo river to turn themselves in to U.S Border Patrol agents to request for asylum in El Paso, Texas, U.S., in Ciudad Juarez, Mexico May 11, 2021. REUTERS/Jose Luis Gonzalez TPX IMAGES OF THE DAY

Asylum-seeking migrants are seen after crossing the Rio Bravo river to turn themselves in to U.S. Border Patrol agents to request for asylum in El Paso, Texas, U.S., as seen from Ciudad Juarez, Mexico May 11, 2021. REUTERS/Jose Luis Gonzalez

Asylum-seeking migrants are seen before crossing the Rio Bravo river to turn themselves in to U.S Border Patrol agents to request for asylum in El Paso, Texas, U.S., in Ciudad Juarez, Mexico May 11, 2021. REUTERS/Jose Luis Gonzalez

Asylum-seeking migrants walk out of the Rio Bravo river after crossing it to turn themselves in to U.S Border Patrol agents and request for asylum in El Paso, Texas, U.S., as seen from Ciudad Juarez, Mexico May 11, 2021. REUTERS/Jose Luis Gonzalez

Asylum-seeking migrants cross the Rio Bravo river to turn themselves in to U.S Border Patrol agents to request for asylum in El Paso, Texas, U.S., as seen from Ciudad Juarez, Mexico May 11, 2021. REUTERS/Jose Luis Gonzalez

A man looks at Tagus river from Praca do Comercio amid the coronavirus disease (COVID-19) pandemic in Lisbon, Portugal, May 11, 2021. REUTERS/Pedro Nunes

Asylum seeking migrants from Central America navigate the rocky riverbank of the Rio Grande river after crossing into the United States from Mexico, in Roma, Texas, U.S., May 11, 2021. REUTERS/Adrees Latif

Asylum seeking migrants from Central America exit a raft after crossing the Rio Grande river into the United States from Mexico, in Roma, Texas, U.S., May 11, 2021. REUTERS/Adrees Latif

Jocelyn, a three year old asylum seeking migrant from Honduras, is held by her mother as she navigates the rocky riverbank of the Rio Grande river after crossing into the United States from Mexico, in Roma, Texas, U.S., May 11, 2021. REUTERS/Adrees Latif

A raft full of asylum-seeking migrants from Central America approaches the rocky riverbank of the Rio Grande river after crossing into the United States from Mexico, in Roma, Texas, U.S., May 11, 2021. REUTERS/Adrees Latif

The carcass of a three-metre minke whale calf that has been put down is readied to be loaded onto the back of a truck at the Royal National Lifeboat Institution (RNLI) Teddington Lifeboat Station to be taken away for a post-mortem examination, by the River Thames in London, Britain May 11, 2021 REUTERS/Tom Nicholson

A three-metre minke whale calf that has been put down is loaded onto the back of a truck at the Royal National Lifeboat Institution (RNLI) Teddington Lifeboat Station to be taken away for a post-mortem examination, by the River Thames in London, Britain May 11, 2021 REUTERS/Tom Nicholson

A three-metre minke whale calf that has been put down is loaded onto the back of a truck at the Royal National Lifeboat Institution (RNLI) Teddington Lifeboat Station to be taken away for a post-mortem examination, by the River Thames in London, Britain May 11, 2021 REUTERS/Tom Nicholson

A three-metre minke whale calf that has been put down is taken away by members of the Royal National Lifeboat Institution (RNLI) and the Cetacean Strandings Investigation Programme (CSIP) on the River Thames in London, Britain May 11, 2021 REUTERS/Tom Nicholson

The carcass of a three-metre minke whale calf that has been put down is seen on the banks of the River Thames in London, Britain May 11, 2021 REUTERS/Tom Nicholson

A three-metre minke whale calf that has been put down is taken away by members of the Royal National Lifeboat Institution (RNLI) and the Cetacean Strandings Investigation Programme (CSIP) on the River Thames in London, Britain May 11, 2021 REUTERS/Tom Nicholson

Asylum-seeking migrants from Venezuela cross the Rio Grande river into the United States from Mexico in Del Rio, Texas, U.S., May 10, 2021. REUTERS/James Breeden

People react looking at the scene after a three-metre minke whale calf has been put down on the banks of the River Thames in London, Britain May 10, 2021 REUTERS/Tom Nicholson

People react looking at the scene after a three-metre minke whale calf has been put down on the banks of the River Thames in London, Britain May 10, 2021 REUTERS/Tom Nicholson

A woman and a dog in a kayak look at the scene after a three-metre minke whale calf has been put down on the banks of the River Thames in London, Britain May 10, 2021 REUTERS/Tom Nicholson

A member of a team attending to a three-metre minke whale calf lays flowers after it has been put down on the banks of the River Thames in London, Britain May 10, 2021 REUTERS/Tom Nicholson

Flowers left on a three-metre minke whale calf lie after is has been put down on the banks of the River Thames in London, Britain May 10, 2021 REUTERS/Tom Nicholson TPX IMAGES OF THE DAY

Members of a team attending to a three-metre minke whale calf work after is has been put down on the banks of the River Thames in London, Britain May 10, 2021 REUTERS/Tom Nicholson

A member of a team looks at a three-metre minke whale calf after is has been put down on the banks of the River Thames in London, Britain, May 10, 2021. Picture taken with a drone. REUTERS/Hannah McKay

A team attends to a three-metre minke whale calf by the River Thames, in London, Britain May 10, 2021 REUTERS/Tom Nicholson

Cristina, an asylum-seeking migrant woman from Romania, holds her two-month-old daughter Eva after crossing the Rio Grande river into the United States from Mexico in Roma, Texas, U.S., May 10, 2021. REUTERS/Adrees Latif

Kinya, an asylum-seeking migrant woman from Honduras, holds her one-year-old son Baron after crossing the Rio Grande river into the United States from Mexico, in Roma, Texas, U.S., May 10, 2021. REUTERS/Adrees Latif

A member of a team attending to a three-metre minke whale calf takes its picture by the River Thames, in London, Britain May 10, 2021 REUTERS/Tom Nicholson

An asylum seeking migrant holds her child while exiting a raft after crossing the Rio Grande river into the United States from Mexico, in Roma, Texas, U.S., May 10, 2021. REUTERS/Adrees Latif

An asylum seeking migrant holds her child after using a raft to cross Rio Grande river into the United States from Mexico, in Roma, Texas, U.S., May 10, 2021. REUTERS/Adrees Latif

Royal National Lifeboat Institution (RNLI) members attend to a three-metre minke whale calf by the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

A spotlight used by the Texas Army National Guard lights the river as a raft full of asylum seeking migrants cross Rio Grande river into the United States from Mexico, in Roma, Texas, U.S., May 10, 2021. REUTERS/Adrees Latif

A member of the Texas Army National Guard lights the river bank for asylum seeking migrant Gerson, of Honduras, as he holds his daughters Elisa, 2, and Arlette, 4, after crossing the Rio Grande river into the United States from Mexico on raft, in Roma, Texas, U.S., May 10, 2021. REUTERS/Adrees Latif TPX IMAGES OF THE DAY

Maria, an asylum seeking migrant from Ecuador, holds her daughter Melani, 4, after crossing the Rio Grande river into the United States from Mexico on raft, in Roma, Texas, U.S., May 10, 2021. REUTERS/Adrees Latif

Maria, an asylum seeking migrant from Ecuador, exits a raft with her daughter Melani, 4, after crossing the Rio Grande river into the United States from Mexico, in Roma, Texas, U.S. May 10, 2021. REUTERS/Adrees Latif

A ZSL London Zoo veterinarian is seen from behind a fence at the scene where a three-metre minke whale calf is in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

A ZSL London Zoo veterinarian is seen at the scene where a three-metre minke whale calf is in the River Thames, in London, Britain May 10, 2021 REUTERS/Tom Nicholson

People watch as Royal National Lifeboat Institution (RNLI) members attend to a three-metre minke whale calf by the River Thames, in London, Britain May 10, 2021 REUTERS/Tom Nicholson

Royal National Lifeboat Institution (RNLI) members attend to a three-metre minke whale calf by the River Thames, in London, Britain May 10, 2021 REUTERS/Tom Nicholson

Royal National Lifeboat Institution (RNLI) members attend to a three-metre minke whale calf in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

Royal National Lifeboat Institution (RNLI) members attend to a three-metre minke whale calf in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

Royal National Lifeboat Institution (RNLI) members attend to a three-metre minke whale calf in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

Royal National Lifeboat Institution (RNLI) members attend to a three-metre minke whale calf that had been found injured and beached on concrete, in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

A three-metre minke whale calf that had been found injured and beached on concrete, is seen in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

A three-metre minke whale calf that had been found injured and beached on concrete, is seen in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

A three-metre minke whale calf that had been found injured and beached on concrete, is seen in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

People watch a three-metre minke whale calf that had been found injured and beached on concrete, in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

A three-metre minke whale calf that had been found injured and beached on concrete, is seen in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

People watch as a boat of the Royal National Lifeboat Institution (RNLI) looks for a three-metre minke whale calf that had been found injured and beached on concrete in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

People watch as a boat of the Royal National Lifeboat Institution (RNLI) looks for a three-metre minke whale calf that had been found injured and beached on concrete in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

A three-metre minke whale calf that was found injured and beached on concrete is seen at Teddington Lock, in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

A three-metre minke whale calf that was found injured and beached on concrete is seen at Teddington Lock, in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay

People stand near the place where a three-metre minke whale calf that had been found injured and beached on concrete is seen, at Teddington Lock, in the River Thames, in London, Britain May 10, 2021 REUTERS/Hannah Mckay