Saunders guided Villa to the First Division title in 1981, before departing during their European Cup-winning campaign the following season.
He also won two League Cups during his eight years at Villa Park.
"Ron Saunders died at 15:00 GMT on Saturday and his family have asked for their privacy to be respected at such a difficult time," a club statement said.
Ben Pearson, from World Animal Protection, says he has an additional concern: "What happens if this private zoo goes bankrupt? Zoos Victoria [in Melbourne] and Sydney's Taronga Zoo are publicly funded so they're able to to maintain high welfare standards.
"If Sydney Zoo goes bust, the elephant they shipped all the way from Dublin will likely have to be shipped back, adding to its distress."
Animal rights group Peta has said the new zoo is "nothing to celebrate" and that "Australians passionate about wild animals" should donate to organisations supporting animals in the wild instead.
Prof Bekoff's research into the sentience of animals reported on the stress, fear and boredom animals experience when confined in claustrophobic zoo enclosures that can be one millionth the size of their natural ranges.
"They'll feel the exact same emotions as companion animals - dogs and cats - if they're just kept locked up," he says.
This is backed up by a study which found that elephants in zoos often endure stress and have significantly shorter life spans than wild elephants.
Then there are the horror-story incidents: Harambe the gorilla was shot and killed in 2016 after dragging a toddler who'd climbed into an enclosure at Cincinnati Zoo; Tilikum the orca killed trainer Dawn Brancheau at Sea World Orlando; London Zoo keeper Jim Robson was killed by an elephant in front of a packed crowd in 2001.
Senator Rick Scott, the ex-governor of Florida, called for a review of training programmes for foreign military personnel on US soil.
"We shouldn't be providing military training to people who wish us harm," he said.
The US defence secretary, Mark Esper, said he wanted to make sure that vetting was adequate.
"I want to make sure that we're doing our due diligence to understand: What are our procedures? Is it sufficient?" he told reporters.
Meanwhile Saudi officials have continued to condemn the attack, including vice-minister of defence, Khalid bin Salman, who said he trained at a US base like many others in the Saudi military.
Sydney's first new major zoo in more than 100 years will open on Saturday. With such debate about animal welfare these days, can zoos still be a force for good? Gary Nunn reports from Sydney.
Zoos have evolved significantly since they were first created.
Their original purpose was braggadocio: a way for the wealthy to display their power in private collections. Later, they helped with science research. Then they became tourist attractions the public would pay to view. It wasn't until the 1970s onwards that conservation emerged as a priority.
Mohammed Saeed Alshamrani was a second lieutenant in the Saudi Air Force in training at the site, US officials say. There are reports that he posted an online manifesto before the attack but this is yet to be confirmed.
Several Saudi nationals were detained near the scene of the shooting, the New York Times reported, citing unnamed sources.
According to the US Navy, there had in recent weeks been 18 Saudi naval aviators and two aircrew members training at Pensacola.
An investigation was taking place and names of victims would not be released until next of kin had been notified, it said in a statement.
What has Saudi Arabia said?
"King Salman of Saudi Arabia just called to express his sincere condolences and give his sympathies to the families and friends of the warriors who were killed and wounded in the attack," President Trump tweeted.
"The King said that the Saudi people are greatly angered by the barbaric actions of the shooter, and that this person in no way shape or form represents the feelings of the Saudi people who love the American people."
In a separate statement, the Saudi foreign ministry called the attack "horrific" and said it would provide "full support" to the investigation.
The FBI are yet to declare a motive but are believed to be investigating for links to terrorism.
"There are many reports circulating, but the FBI deals only in facts," special agent Rachel Rojas told a news conference on Friday night.
Saudi Arabia is a key US ally in the Middle East and the two countries have longstanding military exchange programmes. The shooting has already prompted questions about the vetting of foreign military personnel sent to the US for training.
It is the second shooting to take place at a US military base this week.
A US sailor shot dead two workers at the Pearl Harbor military base in Hawaii on Wednesday.
Saudi Arabia's King Salman condemned a gun attack at a US naval base by a Saudi student as "barbaric", President Donald Trump said.
He tweeted that the monarch had called him to offer "sincere condolences".
The gunman, an aviation student, killed three people and injured at least eight at the base in Pensacola, Florida, before being shot dead.
Florida Governor Ron DeSantis said the Saudi government was "going to owe a debt" to the victims.
The attacker has been named by US media as Mohammed Saeed Alshamrani. He used a handgun during the shooting.
For a long time, there have been only two contraceptive solutions which rely directly on men.
They can either wear a condom, or have sterilising surgery called a vasectomy to cut or seal the two tubes that carry sperm to the penis. A male birth control pill and a contraceptive gel are still in the works.
But India says it is going to launch the world's first male birth control injection soon. Will this be the male contraceptive that succeeds?
Invented by Sujoy Guha, a maverick 78-year-old Delhi-based biomedical engineer, the drug is a single preloaded syringe shot into the tubes carrying sperm from the testicle to the penis, under local anaesthesia. The non-hormonal, long-acting contraceptive, researchers claim, will be effective for 13 years.
In a campaign where both parties have sought to repeatedly talk about their key themes, tonight did not diverge radically from the script.
Boris Johnson came under pressure on the issue of trust - and whether his Brexit plan would mean checks between Great Britain and Northern Ireland.
Jeremy Corbyn was once again pressed on his failure to pick a side on Brexit - and questioned on why Europe would offer Labour a new deal when so many frontbenchers back Remain.
Both men landed punches. But none of them were critical.
And given that polls suggest the Conservatives are ahead in the polls - that might suit Boris Johnson more than Jeremy Corbyn.
Responding to the performances of Mr Corbyn and Mr Johnson, SNP leader Nicola Sturgeon tweeted: "That was utterly woeful. Two uninspiring men, both of them unsuited to be PM."
Meanwhile, Amelia Womack, of the Green Party, told the BBC: "I find it frustrating, as a younger woman, that we weren't discussing things that are relevant to my generation - whether that's house prices, rental prices, freedom of movement across Europe, or even zero-hour contracts."
Plaid Cymru's Liz Saville Roberts said the debate felt like a "shoddy end-of-term pantomime", and said both men displayed a "lack of honesty".
The prime minister and Mr Corbyn were also asked about security - an issue that has risen to prominence since the London Bridge attack on 29 November.
Both candidates were asked by an audience member if they would prioritise the safety of citizens over human rights.
Mr Corbyn said the choice was "not an either/or".
He added the UK could not have security "on the cheap", and so Labour would "back the police up" with an increase in officer numbers.
When it came to his turn, Mr Johnson referred to the London Bridge attack, and said it was "extraordinary and wrong" that the attacker was given automatic early release from prison after an earlier terrorism conviction.
Like Brexit, the NHS has featured heavily in the campaign so far - and Friday's debate was no different.
Faith, a student nurse in the audience, asked how each leader would deal with a shortage of NHS nurses.
The Conservative leader said a government run by him would "encourage nurses overseas to come" to the UK "by shortening the time for their visa applications" and by reintroducing bursaries for training.
Mr Corbyn described the NHS as at "breaking point", adding that, under a Labour government, "￡40bn in total would go into the NHS in order to fund it properly".
The Labour leader also repeated one of his main attack lines of the campaign - that a Tory government would allow the NHS to form part of a future trade deal with the US.
However, Mr Johnson described that claim as "Bermuda Triangle stuff".
Coming into the event, Labour and the Conservatives had spent the day arguing over how Mr Johnson's Brexit deal might affect Northern Ireland.
Labour said a leaked document showed Mr Johnson's agreement would have a "devastating" impact on Northern Ireland.
When the subject arose in the debate, Mr Corbyn said of his rival: "He spoke at a DUP conference and said there would be no [trade] restrictions [after Brexit] whatsoever, we now know there are restrictions."
But Mr Johnson was met with applause from the audience when he said he found it "slightly curious" to be lectured about the union by Mr Corbyn, referring to the Labour leader's past support for those who want to see a united Ireland.
Boris Johnson and Jeremy Corbyn clashed over Brexit in the final head-to-head debate before the 12 December election.
During the live debate, Mr Corbyn said Labour would bring Brexit "to an end" by negotiating a new deal and putting it back to the public in a referendum, alongside a Remain option.
Mr Johnson said he had "a wonderful deal", and would use it to take the UK out of the EU on 31 January.
Other topics covered included the NHS, security and Northern Ireland.
Early on in the debate - hosted by Today presenter Nick Robinson - the Labour leader said he would negotiate a new withdrawal agreement with the EU within three months before putting it to a final say referendum - alongside Remain - within six months.
The prime minister countered by saying he already had a withdrawal agreement in place, and would use it to leave the EU next month if he won a working majority in Parliament.
But Nick Robinson challenged Mr Johnson, pointing out that while he had a withdrawal deal in place, he did not have a trade deal with the EU, and so could not rule out a no-deal exit in January 2021.
The victim left home on her motorbike at about 18:00 local time (12:30 GMT) 10 days ago to go to a doctor's appointment.
She called family later to say she had a flat tyre, and a lorry driver had offered to help. She said she was waiting near a toll plaza.
Efforts to contact her afterwards were unsuccessful, and her body was discovered under a flyover last Thursday.
Last week, three police officers were suspended when the victim's family accused them of not acting quickly enough when the woman was reported missing.
Prakash Singh, a retired police officer and a key architect of police reforms, told the BBC the killings were "entirely avoidable".
"Abundant caution should be taken when people in custody are being taken to the court or the scene of the crime," he said.
"They should be secured, handcuffed and properly searched before they are taken out. All kinds of things can happen if the police are not careful."
But Mr Singh said it was too early to say if the incident was an extrajudicial killing - known popularly in India as an "encounter killing".
News of the police action has been widely celebrated on social media.
Many took to Twitter and Facebook to applaud the police, saying they had "delivered justice".
The mother of a student who died after being gang-raped on a bus in capital Delhi in 2012 also hailed the killing.
"I am extremely happy with this punishment. Police have done a great job," she told ANI news agency.
BBC Telugu reporter Satish Balla, reporting from the scene of the killings, said approximately 2,000 people had gathered, causing a huge traffic jam. Police were showered with rose petals.
"Although the officers maintained restraint and asked them to surrender, they continued to fire and attack us. This went on for 15 minutes. We retaliated and four accused got killed."
Two officers suffered head injuries but these were not caused by bullets, he added. The two police officers were admitted to hospital, he said
"Let me tell you this. The law has taken its own course," he added.
The police were heavily criticised after the rape and murder of the vet - particularly when the victim's family accused them of inaction for two hours.
However, human rights organisations including Amnesty International have called for investigations to determine if these were extrajudicial killings.
"Extrajudicial killings are not a solution to preventing rape," said Avinash Kumar, executive director of Amnesty International India.
The 27-year-old rape victim's charred remains were discovered last Thursday - leading to outrage and protests over alleged police inaction.
After news of the killings broke, the victim's mother told the BBC, "justice has been done", while neighbours celebrated with firecrackers, and thousands of people took to the streets to hail the police.
Indian police have shot dead four men suspected of raping and killing a young female vet in Hyderabad last week.
The men were in police detention and were taken back to the scene of the crime in the early hours of Friday.
The suspects were shot when they tried to steal the officers' guns and escape, police told BBC Telugu.
Ten armed policemen took the four suspects - who were not handcuffed - to the scene of the crime to reconstruct the incident early on Friday, said VC Sajjanar, police commissioner of the Hyderabad suburb of Cyberabad.
The toll plaza where the rape and murder took place is close to the suburb, which houses a number of global tech companies like Microsoft and Google.
The police were looking for the victim's phone, power bank and watch which were reported missing, the police commissioner said.
"The four men got together and started to attack the officers with stones and sticks and also snatched away weapons from two officers and started firing," the commissioner said, in response to questions about why the men had been killed.
Roma, along with Inter's rivals AC Milan, announced later on Thursday they will not work with Corriere dello Sport until January.
A joint statement released at the same time by Roma and AC Milan said: "We have decided to ban Corriere dello Sport from our training facilities for the rest of the year and our players will not carry out any media activities with the newspaper during this period.
"Both clubs are aware the actual newspaper article associated with the 'Black Friday' headline did portray an anti-racist message and for this reason we have only banned Corriere dello Sport until January.
Arsenal interim boss Freddie Ljungberg: "We didn't show up in the first half, didn't work hard and want to play.
"Second half we had a word and were better but we are suspect on the counter and we have no confidence. I need to work on that and get confidence back into the boys.
"At half-time we said 'This is not Arsenal, we have to give it a crack.'
"We're in a difficult situation, we've lost a lot of games and the confidence has gone down."
Gunners in the Europa League in February 2018.
Asked before the game whether he would be a Premier League manager if Ostersunds had not had a good run in Europe, Potter said: "Probably not. We all get to a certain point by doing something and everyone's path is different. Ostersunds was mine."
The Seagulls had given leaders Liverpool a late score on Saturday and, on a night to remember, they carried on from where they left off at Anfield to climb three places up the table to 13th - one point behind Arsenal.
Inter Milan striker Romelu Lukaku says the 'Black Friday' headline used by Italian newspaper Corriere dello Sport is "one of the dumbest" he has seen, while Roma's Chris Smalling condemned it as "wrong and insensitive".
The headline accompanied pictures of Lukaku and Smalling prior to Friday's match between their two sides.
"You guys keep fuelling the negativity and the racism issue," Lukaku said.
Smalling urged the newspaper's editors to "understand the power they possess".
Ljungberg dropped Shkodran Mustafi from his 18 after last Sunday's 2-2 draw with struggling Norwich, yet Arsenal were still a shambles at the back.
Maupay had already forced Bernd Leno into a one-handed save when Webster struck from a corner after lashing home following Dan Burn's downward header.
Arsenal improved with the introduction of club record signing Nicolas Pepe after half-time and France forward Lacazette lifted the mood by climbing above the Brighton defence to head his side level after Mesut Ozil's first Premier League assist since February.
Yet the Gunners were short on confidence and ideas - while Mat Ryan produced a superb save at the end to frustrate the home side further.
The Brighton keeper flung himself across his line to keep out substitute Gabriel Martinelli as Arsenal, who have home games against Manchester City, Chelsea and Manchester United on the horizon, failed to win for the 11th time in 15 top-flight attempts.
The home side's night was summed up towards the end of the first half when Pierre-Emerick Aubameyang had a go at team-mate Joe Willock after a home move had broken down.
Arsenal, who are 10th in the table, have now failed to win any of their last nine games in all competitions and fans who stayed for the final whistle booed their team off the pitch after a tepid performance.
Twelve years after his last appearance for Arsenal as a player, Ljungberg was given a chance to show fans inside a far-from-full Emirates he is capable of managing the club where he won two Premier League titles and three FA Cups.
Managerless Arsenal's season plummeted to a new low as they were beaten by Brighton in interim manager Freddie Ljungberg's first home match in charge.
Alexandre Lacazette marked his 100th Gunners appearance by heading his side level after Adam Webster had given the visitors a first-half lead.
With the score 1-1, there was frustration for Ljungberg and Arsenal when David Luiz thought he had made it 2-1 with a volley but it was correctly ruled out following a VAR check for offside.
In October, police lodged a criminal case against "unknown persons" and began looking for the newborn's parents.
They said they believed her parents were complicit in her burial, because even after the case was widely Talks with Donald Trump have not gone to plan. Strict economic sanctions remain in place and it appears Washington is not going to budge despite Pyongyang's insistence that they come up with another deal to resolve the nuclear issue by the end of the year.
Donald Trump, too, seems to be frustrated. He has once again hinted at the possibility of military action against North Korea if necessary, despite highlighting his "good relationship" with the North Korean leader.
These next few weeks may be critical for US-North Korean diplomacy.
"I think we're seeing the start of what could be a return to a very familiar crisis in 2020," Ankit Panda, North Korea expert at the Federation of American Scientists, told the BBC.
They said they believed her parents were complicit in her burial, because even after the case was widely publicised, no-one came forward to claim her.
Officials have not speculated on possible motives, but India's gender ratio is one of the worst in the world. Women are often discriminated against socially and girls are seen as a financial burden, especially among poor communities.
Although most unwanted female foetuses are aborted with help from illegal sex determination clinics, cases of baby girls being killed after birth are not uncommon either.
The villager said he had dug about 90cm (3ft) below the surface when his shovel hit the earthen pot which broke and he heard a baby crying. When he pulled out the pot, he found a baby in it.
She was first taken to the local government hospital but, two days later, she was moved to Dr Khanna's paediatric hospital which has better facilities.
Doctors said she was a premature baby, possibly born at 30 weeks, and weighed a mere 1.1kg (2.4lb) when she was brought in. She appeared visibly shrivelled, was hypothermic and had hypoglycaemia (low blood sugar).
Her parents have not been traced and she will be put up for adoption after a mandatory wait period.
For now, she is now in the custody of child welfare authorities in Bareilly district, in the northern state of Uttar Pradesh.
She was found accidentally by a villager who was burying his own daughter, who was stillborn. Hindus generally cremate their dead, but babies and young children are often buried.
A premature newborn baby found buried alive in a clay pot in northern India has fully recovered, her doctor says.
She was brought to hospital in a critical condition, suffering from septicaemia and a dangerously low platelet count in mid-October.
She has now gained weight and breathing and platelet counts are normal, her paediatrician Ravi Khanna told the BBC.
Everton manager Marco Silva faces the sack, with the club's board expected to decide his future on Thursday - and former boss David Moyes under consideration as an interim replacement.
Silva has already survived one round of emergency talks among the club's hierarchy after the home loss to Norwich City on 23 November but it is increasingly unlikely he will be spared a second time after the humiliating 5-2 thrashing in the Merseyside derby at Anfield left Everton in the relegation zone.
The 42-year-old Portuguese was asked about his future in the aftermath of Everton's eighth defeat in 11 games and said: "I am not the right person to talk about this situation. You are asking me and I don't have the answer."
The answer may be delivered on Thursday, with Silva increasingly unlikely to be in charge for Saturday's game against Chelsea at Goodison Park.
If he goes, and in the unlikely event Everton announce a long-term replacement, 56-year-old Scot Moyes is in the frame to return, after being discussed behind the scenes at Goodison Park as a temporary solution.