A juvenile grey-headed flying fox hangs in a care centre set up at a home in Bomaderry, Australia January 20, 2020. REUTERS/Angie Teo

Grey-headed flying fox Winston is by Janine Davies, who set up Shoalhaven Bat Clinic, a care centre for flying foxes, in her home in Bomaderry, Australia, January 20, 2020. REUTERS/Angie Teo

Janine Davies, who set up Shoalhaven Bat Clinic, a care centre for flying foxes, in her home, holds a baby grey-headed flying fox in Bomaderry, Australia, January 20, 2020. REUTERS/Angie Teo

An adult grey-headed flying fox hangs in a care centre set up at a home in Bomaderry, Australia January 20, 2020. REUTERS/Angie Teo

A juvenile grey-headed flying fox peeps out from a towel as it hangs in a care centre set up at a home in Bomaderry, Australia January 20, 2020. REUTERS/Angie Teo

Janine Davies, who set up Shoalhaven Bat Clinic, a care centre for flying foxes, in her home, holds a baby grey-headed flying fox in Bomaderry, Australia, January 20, 2020. REUTERS/Angie Teo

An adult grey-headed flying fox hangs in a care centre set up at a home in Bomaderry, Australia January 20, 2020. REUTERS/Angie Teo

A baby grey-headed flying fox with a 'pacifier' looks on in Bomaderry, Australia, January 20, 2020. REUTERS/Angie Teo

Janine Davies, who set up Shoalhaven Bat Clinic, a care centre for flying foxes, in her home, looks at bats in Bomaderry, Australia, January 20, 2020. REUTERS/Angie Teo

Milk bottles for baby flying foxes seen in Janine Davies' kitchen in Bomaderry, Australia January 20, 2020. REUTERS/Angie Teo in Bomaderry, Australia, January 20, 2020. REUTERS/Angie Teo

Janine Davies, who set up Shoalhaven Bat Clinic, a care centre for flying foxes, fills up milk bottles for baby flying foxes in her home in Bomaderry, Australia, January 20, 2020. REUTERS/Angie Teo

A juvenile grey-headed flying fox drinks from a milk dispenser in a care centre set up at a home in Bomaderry, Australia January 20, 2020. REUTERS/Angie Teo

Janine Davies, who set up Shoalhaven Bat Clinic, a care centre for flying foxes, in her home, holds a grey-headed flying fox in Bomaderry, Australia, January 20, 2020. REUTERS/Angie Teo

A bionic flying fox is displayed at Festo's booth at the World Robot Conference (WRC) in Beijing, China August 15, 2018. REUTERS/Jason Lee TPX IMAGES OF THE DAY

Visitors take pictures of a bionic flying fox at Festo's booth at the World Robot Conference (WRC) in Beijing, China August 15, 2018. REUTERS/Jason Lee

A staff member carries a bionic flying fox for a performance at Festo's booth at the World Robot Conference (WRC) in Beijing, China August 15, 2018. REUTERS/Jason Lee

Visitors take pictures of a bionic flying fox at Festo's booth at the World Robot Conference (WRC) in Beijing, China August 15, 2018. REUTERS/Jason Lee

A bionic flying fox is displayed at Festo's booth at the World Robot Conference (WRC) in Beijing, China August 15, 2018. REUTERS/Jason Lee

A staff member prepares to fly a bionic flying fox for a performance at Festo's booth at the World Robot Conference (WRC) in Beijing, China August 15, 2018. REUTERS/Jason Lee

A tamed hawk chases a dove during an annual hunters competition at Almaty hippodrome, Kazakhstan February 10, 2018. REUTERS/Shamil Zhumatov

A tamed golden eagle chases a fox during an annual hunters competition at Almaty hippodrome, Kazakhstan February 10, 2018. REUTERS/Shamil Zhumatov

A tamed golden eagle chases a fox during an annual hunters competition at Almaty hippodrome, Kazakhstan February 10, 2018. REUTERS/Shamil Zhumatov

Dr. Eugene Parker, University of Chicago astrophysicist, (L), receives a first scale model of Parker Solar Probe from Dr. Nicola Fox, project scientist for the Solar Probe Plus, (R), during the NASA announcement on its first mission to fly directly into the sun's atmosphere at the University of Chicago in Chicago, Illinois, U.S. May 31, 2017. REUTERS/Kamil Krzaczynski

Dr. Eugene Parker, University of Chicago astrophysicist (2nd L), speaks as Dr. Thomas Zurbuchen, Associate Administrator for the Science Mission Directorate at NASA (L), Dr. Nicola Fox, project scientist for the Solar Probe Plus (2nd R) and Dr. Rocky Kolb, from University of Chicago (R), listen during the NASA announcement on its first mission to fly directly into the sun's atmosphere at the University of Chicago in Chicago, Illinois, U.S. May 31, 2017. REUTERS/Kamil Krzaczynski

Dr. Thomas Zurbuchen , Associate Administrator for the Science Mission Directorate at NASA (R), speaks as Dr. Eugene Parker, University of Chicago astrophysicist (L), Dr. Nicola Fox, project scientist for the Solar Probe Plus and Dr. Rocky Kolb, from University of Chicago (2nd R), listen during the NASA announcement on its first mission to fly directly into the sun's atmosphere at the University of Chicago in Chicago, Illinois, U.S. May 31, 2017. REUTERS/Kamil Krzaczynski

2011 NIKE MAG shoes, based on the original NIKE MAG worn in 2015 by the "Back to the Future" character Marty McFly, played by Michael J. Fox, are displayed during its unveiling at The Montalban Theatre in Hollywood, California September 8, 2011. REUTERS/Danny Moloshok/File Photo GLOBAL BUSINESS WEEK AHEAD PACKAGE - SEARCH BUSINESS WEEK AHEAD SEPTEMBER 26 FOR ALL IMAGES

Israeli woman, Nora Lifschitz, 28, holds an injured Egyptian fruit bat at her home in Tel Aviv February 21, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 21, 2016. REUTERS/Baz Ratner

Israeli woman, Nora Lifschitz, 28, holds an injured Egyptian fruit bat at her home in Tel Aviv February 21, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 21, 2016. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

Israeli woman, Nora Lifschitz, 28, holds an injured Egyptian fruit bat at her home in Tel Aviv February 21, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 21, 2016. REUTERS/Baz Ratner

An injured Egyptian fruit bat perches next to cages at the home of Israeli woman, Nora Lifschitz, 28, in Tel Aviv February 22, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 22, 2016. REUTERS/Baz Ratner

Israeli woman, Nora Lifschitz, 28, treats Egyptian fruit bats at her home in Tel Aviv February 22, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 22, 2016. REUTERS/Baz Ratner

Israeli woman, Nora Lifschitz, 28, feeds an injured Egyptian fruit bat at her home in Tel Aviv February 21, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 21, 2016. REUTERS/Baz Ratner

Israeli woman, Nora Lifschitz, 28, holds an injured Egyptian fruit bat at her home in Tel Aviv February 22, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 22, 2016. REUTERS/Baz Ratner

Israeli woman, Nora Lifschitz, 28, holds an injured Egyptian fruit bat at her home in Tel Aviv February 21, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 21, 2016. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

An injured Egyptian fruit bat hangs on a teddy bear at the home of Israeli woman, Nora Lifschitz, 28, in Tel Aviv February 21, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 21, 2016. REUTERS/Baz Ratner

Injured Egyptian fruit bats hang on a teddy bear at the home of Israeli woman, Nora Lifschitz, 28, in Tel Aviv February 21, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 21, 2016. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

Israeli woman, Nora Lifschitz, 28, treats an Egyptian fruit bat at her home in Tel Aviv February 22, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 22, 2016. REUTERS/Baz Ratner

Israeli woman, Nora Lifschitz, 28, holds an injured Egyptian fruit bat at her home in Tel Aviv February 21, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. Picture taken February 21, 2016. REUTERS/Baz Ratner

Police officers in a helicopter fly over trees during a manhunt in Fox Lake, Illinois, United States, September 1, 2015. Police with dogs and helicopters are searching woods and swampy areas north of Chicago for three armed suspects after a police officer was shot dead on Tuesday in the suburb of Fox Lake, a local law enforcement official said. REUTERS/Jim Young

U.S. Air Force F-16 Thunderbirds fly in formation over General William J. Fox Airfield during a media day ahead of the Los Angeles County Air Show in Lancaster, California March 19, 2015. REUTERS/Mario Anzuoni

F-16 U.S. Air Force Thunderbirds fly in formation over General William J. Fox Airfield during a media day ahead of the Los Angeles County Air Show in Lancaster, California March 19, 2015. REUTERS/Mario Anzuoni

F-16 U.S. Air Force Thunderbirds fly in formation over General William J. Fox Airfield during a media day ahead of the Los Angeles County Air Show in Lancaster, California March 19, 2015. REUTERS/Mario Anzuoni

F-16 U.S. Air Force Thunderbirds fly in formation over General William J. Fox Airfield during a media day ahead of the Los Angeles County Air Show in Lancaster, California March 19, 2015. REUTERS/Mario Anzuoni

A boy holds onto a flying fox at Municipal Park Monday, located near the border with Brazil and Argentina, in Presidente Franco district, Alto Parana, May 4, 2014. REUTERS/Jorge Adorno (PARAGUAY - Tags: ENVIRONMENT TRAVEL)

A tame fox approaches revellers gathering at the summit of Broken mountain in the Harz regions during celebrations of the Walpurgisnacht pagan festival, April 30, 2014. Legend has it that on Walpurgisnacht or May Eve, witches fly their broomsticks to meet the devil at the summit of the Brocken Mountain in Harz. In towns and villages scattered throughout the mountain region, locals make bonfires, dress in devil or witches costumes and dance into the new month of May. Picture taken April 30, 2014. REUTERS/Thomas Peter (GERMANY - Tags: SOCIETY ANIMALS)

Australia's Prime Minister Tony Abbott meets with Royal New Zealand Air Force Squadron Leader Leon Fox during his visit to RAAF Base Pearce near Perth March 31, 2014. Abbott said on Monday there was no time limit on the hunt for Malaysia Airlines flight MH370, missing for more than three weeks in the Indian Ocean with 239 people on board. Abbott met on Monday with members of various international military forces currently searching for MH370 in the Indian Ocean. Fox's team have been flying a Royal New Zealand Air Force P-3K2 Orion aircraft in the Indian Ocean searching for MH370. REUTERS/Jason Reed (AUSTRALIA - Tags: MILITARY TRANSPORT DISASTER POLITICS)

Airplanes fly in formation at the Los Angeles County Air Show at the General William J. Fox Airfield in Lancaster, California, March 21, 2014. REUTERS/David McNew (UNITED STATES - Tags: TRANSPORT SOCIETY)

Ron Hackworth flies a Northrop N9MB Flying Wing, designed in 1944 and considered the grandfather of the B-2 Stealth Bomber, over Navy Blue Angels F/A-18 Hornet fighter jets on the tarmac at the Los Angeles County Air Show at the General William J. Fox Airfield in Lancaster, California, March 21, 2014. REUTERS/David McNew (UNITED STATES - Tags: TRANSPORT MILITARY)

Two U.S. Navy Blue Angels F/A-18 Hornet fighter jets fly side-by-side, one right-side up and one up-side down, at the Los Angeles County Air Show at the General William J. Fox Airfield in Lancaster, California, March 21, 2014. Show officials called it a draw. REUTERS/David McNew (UNITED STATES - Tags: MILITARY TRANSPORT)

Ron Hackworth flies a Northrop N9MB Flying Wing, designed in 1944 and considered the grandfather of the B-2 Stealth Bomber, at the Los Angeles County Air Show at the General William J. Fox Airfield in Lancaster, California, March 21, 2014. REUTERS/David McNew (UNITED STATES - Tags: MILITARY TRANSPORT)

Ron Hackworth flies a Northrop N9MB Flying Wing, designed in 1944 and considered the grandfather of the B-2 Stealth Bomber, at the Los Angeles County Air Show at the General William J. Fox Airfield in Lancaster, California, March 21, 2014. REUTERS/David McNew (UNITED STATES - Tags: TRANSPORT SOCIETY)

Ron Hackworth sits on an experimental Northrop N9MB Flying Wing, designed in 1944 and considered the grandfather of the B-2 Stealth Bomber, above another pilot, Ed Maloney, on rehearsal day for the Los Angeles County Air Show at the General William J. Fox Airfield in Lancaster, California, March 20, 2014. The air show will take place on Friday March 21 and Saturday March 22. REUTERS/David McNew (UNITED STATES - Tags: TRANSPORT)

Ron Hackworth taxis an experimental Northrop N9MB Flying Wing, designed in 1944 and considered the grandfather of the B-2 Stealth Bomber, past Blue Angeles F/A-18 Hornet fighter jets on rehearsal day for the Los Angeles County Air Show at the General William J. Fox Airfield in Lancaster, California, March 20, 2014. The air show will take place on Friday March 21 and Saturday March 22. REUTERS/David McNew (UNITED STATES - Tags: MILITARY TRANSPORT)

The U.S. Navy Flight Demonstration Squadron, the Blue Angels, fly in a tight formation as they practice their routines in F/A-18 Hornet fighter jets on rehearsal day for the Los Angeles County Air Show, where they will be the headline act, at the General William J. Fox Airfield in Lancaster, California, March 20, 2014. The Blue Angeles are making a comeback with the start of a season after having been sequestration grounded the team from performing in public air shows last April. REUTERS/David McNew (UNITED STATES - Tags: MILITARY TRANSPORT)

The U.S. Navy Flight Demonstration Squadron, the Blue Angels, fly in a tight formation as they practice their routines in F/A-18 Hornet fighter jets on rehearsal day for the Los Angeles County Air Show, where they will be the headline act, at the General William J. Fox Airfield in Lancaster, California, March 20, 2014. The Blue Angeles are making a comeback with the start of a season after having been sequestration grounded the team from performing in public air shows last April. REUTERS/David McNew (UNITED STATES - Tags: TRANSPORT MILITARY)

A veterinarian (L) takes a blood sample from an Andean Condor, one of the world's biggest flying birds, at a veterinary hospital in Los Andes, approximately 80 km (50 miles) north of Santiago, August 12, 2013. Authorities are investigating the discovery of at least 20 Andean Condors, found poisoned on Sunday afternoon next to a road in Los Andes. Two of the Condors were discovered to be dead, and director of Santiago's Metropolitan Zoo added that two foxes were also found dead, according to various media reports. REUTERS/Ivan Alvarado (CHILE - Tags: ENVIRONMENT SOCIETY ANIMALS)

An Andean Condor, one of the world's biggest flying birds, rests inside a cage at a veterinary hospital in Los Andes, approximately 80 km (50 miles) north of Santiago, August 12, 2013. Authorities today are investigating the discovery of at least 20 Andean Condors, found poisoned on Sunday afternoon next to a road in Los Andes. Two of the Condors were discovered to be dead, and director of Santiago's Metropolitan Zoo added that two foxes were also found dead, according to various media reports. REUTERS/Ivan Alvarado (CHILE - Tags: ENVIRONMENT SOCIETY ANIMALS)

A dead Andean Condor, one of the world's biggest flying birds, lies on the ground at a veterinary hospital in Los Andes, approximately 80 km (50 miles) north of Santiago, August 12, 2013. Authorities are investigating the discovery of at least 20 Andean Condors, found poisoned on Sunday afternoon next to a road in Los Andes. Two of the Condors were discovered to be dead, and director of Santiago's Metropolitan Zoo added that two foxes were also found dead, according to various media reports. REUTERS/Ivan Alvarado (CHILE - Tags: ENVIRONMENT SOCIETY ANIMALS)

Veterinarians hold an Andean Condor, one of the world's biggest flying birds, at a veterinary hospital in Los Andes, approximately 80 km (50 miles) north of Santiago, August 12, 2013. Authorities are investigating the discovery of at least 20 Andean Condors, found poisoned on Sunday afternoon next to a road in Los Andes. Two of the Condors were discovered to be dead, and director of Santiago's Metropolitan Zoo added that two foxes were also found dead, according to various media reports. REUTERS/Ivan Alvarado (CHILE - Tags: ENVIRONMENT SOCIETY ANIMALS)

Veterinarians hold an Andean Condor, one of the world's biggest flying birds, at a veterinary hospital in Los Andes, approximately 80 km (50 miles) north of Santiago, August 12, 2013. Authorities are investigating the discovery of at least 20 Andean Condors, found poisoned on Sunday afternoon next to a road in Los Andes. Two of the Condors were discovered to be dead, and director of Santiago's Metropolitan Zoo added that two foxes were also found dead, according to various media reports. REUTERS/Ivan Alvarado (CHILE - Tags: ENVIRONMENT SOCIETY ANIMALS)