Merlin Tuttle Bat Flash

Response to Recent PBS NOVA Program

9-20-21
Merlin Tuttle

I had mixed feelings while watching the September 15, 2021 airing of PBS’ NOVA program, Bat Superpowers: Could the source of the deadliest viruses hold the secret to a healthier and longer life? Most of the scientists interviewed clearly liked bats and wanted to aid in their protection. Nevertheless, despite the many positive things reported, for the public, the take-home message was confusing – “Bats are really cool and likable, but they are also dangerous spreaders of the world’s deadliest diseases.”

Unfortunately, people seldom tolerate and often kill animals they fear. Rattlesnakes are widely understood to be beneficial, but they are almost universally killed when found near humans. In fact, on the mere possibility of being venomous, nearly all snakes are killed.

 

From the 1970s to the mid-80s, exaggerated media warnings claimed most bats were rabid and aggressive. And fearful Americans spent millions of dollars annually paying exterminators to kill them. In more than 60 years studying bats, I have personally documented instances in which thousands at a time were poisoned in buildings or burned alive in their caves. I have also saved millions by simply helping people put fear in perspective.

By eating a single moth, a horseshoe bat can prevent hundreds of eggs from being laid on crops.
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Comments on World Health Organization’s COVID-19 Report

The World Health Organization’s recent report on COVID-19 speculates a bat origin. However, its findings are seriously flawed and questioned by the Biden administration according to the Wall Street Journal. Former CDC Director, Robert Redfield, in his CNN interview, still believes it escaped from a lab in China. The origin clearly remains unresolved.

A review of scientific literature reveals that SARS-CoV-2, the coronavirus that causes COVID-19, has not been found in bats, and there are no reports of transmission from a bat to a human.

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Bat Flash! Help John Oliver Put Bats in Perspective

The Last Week Tonight with John Oliver February 15th episode shared misguided speculations about bats. Here is Merlin’s public letter to John Oliver. We don’t have his email address, so we’re counting on you to help get his attention. No shade, John, we understand the topic is muddy. We simply want the opportunity to set the record straight!

Contact information and action steps are listed below. You can still help!

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USA Today Bat Flash Follow-up

Many thanks to all who responded to last week’s Bat FlashWe were copied on emails and are delighted to see your politely and positively framed responses. 

MTBC’s objective is to encourage the authors, editors and decision makers to refocus attention to balanced reporting of scientifically sound facts. We offer our resources and, with the help of our members, these responses have often led to collaborations, op-eds or follow up publications that put the truth in perspective. Misunderstandings are common and often shared by well intended writers. Unfortunately speculation gets shared as fact, so much so that it becomes difficult to see the truth.

Many of you received identical replies from the authors, as shown below. Merlin responded on February 1, 2021 to both USA Today authors, Karen Weintraub and Elizabeth Weise, as follows:

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Bat Flash! Where Did COVID-19 Really Come From?

01/28/21

By Merlin Tuttle

USA Today’s January 17 story, Where did Covid-19 come from? leads with the following statement “The coronavirus that conquered the world came from a thumb-sized bat tucked inside a remote Chinese cave. Of this much, scientists are convinced.”

Deep in the story, they quote virologist John Connor at Boston University, saying ‘It looks like it’s a bat-derived virus, and there’s a big question mark after that.’ Fellow virologist, Charles Chiu, an expert in viral genomics at the University of California—San Francisco, is additionally quoted as saying ‘It may also have emerged from any setting in which people come into contact with animals, including farms, pets or zoos.’

Clearly, all scientists are not convinced that this virus came from bats, not even those interviewed for this story. The disproportionate focus on bats as the source of the COVID-19 pandemic is based on poorly supported speculation that harms conservation efforts worldwide.

Intermediate Horseshoe Bat (Rhinolophus affinis)

One of the most cited studies accuses bats of hosting more viruses than other mammals. Yet, the authors of this study surveyed twice as many bats as all other mammals combined. More inclusive research suggests that bats do not harbor more viruses than other animals.

New viruses can be found wherever we look, so it is not surprising to find more in the animals that are predominately searched. The claim that the SARS-CoV-2 virus, the source of the COVID-19 pandemic, shares 96% of its genetic material with a coronavirus found in a horseshoe bat is meaningless. We ourselves are 96% genetically similar to chimpanzees which we easily recognize as non-human.

Current biases threaten the survival of bats that have undisputed value and are already in alarming decline. They also harm science credibility and misdirect the search for zoonotic reservoirs by focusing disproportionately on bats. Despite relentless searching and endless speculation, there is no documentation that SARS-CoV-2, SARS, MERS, or Ebola viruses have been found in, or transmitted from a bat to a human.

As noted by Yong-Zhen Zhang and Edward Holmes, it is critical that coronavirus surveillance should include animals other than bats. Blaming bats based on one-sided searches is premature and misleading.

 TAKE ACTION!

Our combined voices can make a difference. We invite you to politely share your opinion in your own words with the editors. You may find our resources, Give Bats a Break and Good Intentions Can Still Leave a Bad Taste, additionally helpful in composing your personal reply and discussing these topics with others. Editors do take notice. Remember, your response can be very simple such as, “I don’t appreciate misleading speculation that perpetuates needless fear of bats.” Editors just need to know you like or dislike an article for you to have an impact.

It’s numbers that count and bats need all of you! Tell a friend about bat values and how they can help.

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Bat Flash! NatGeo’s “Virus Hunters” Spreads Groundless Claims About Bats

11/2/2020

By Merlin Tuttle

I viewed the National Geographic documentary series titled, “Virus Hunters,” with substantial disappointment. Warnings of growing reliance on bush meat and industrial farming were justified. However, coverage of wildlife too often exaggerated risks from bats. 

Bats are exceptionally easy to trap in large numbers, have few defenders, and are easily misunderstood. This makes them prime targets for scary speculation that is exceptionally lucrative in gaining media readership and unprecedentedly large grants. And unfortunately, the opinions of leading virologists who doubt that virus hunters can predict or prevent pandemics were left unmentioned.

The 2017 study that reported more viruses in bats than in other mammals sampled nearly twice as many bats as all other mammalian orders combined. Since most viruses have yet to be discovered, new ones can be found wherever we look. And because bats are an ancient group of mammals, it is not surprising that they sometimes host ancestors of modern species. 2020 study, concluding that bats harbor no more viruses than other animals, has been largely ignored.

Hundreds of thousands of Straw-colored fruit bats (Eidolon helvum) beginning their evening departure from a city park in Ivory Coast, Africa. Cities often provide the only homes safe from commercial hunters who sell them for people to eat. Despite such large numbers having lived in close association with humans throughout recorded history, they have not caused disease outbreaks. Their remarkable safety record casts grave doubt on recent speculation of their being dangerous carriers of disease.

Documented transmission of any disease from a bat to a human is exceedingly rare, and the risk is near zero for anyone who simply does not handle them. Hundreds of thousands of bats live in city parks across Africa. Yet there are no verified cases of Ebola transmission, despite huge efforts to find such an association. In fact, despite repeated assertions, there are no documented cases of Ebola, MERS, or SARS-CoV-2 viruses ever having been found in a bat, much less transmitted from a bat to a human. In truth, bats have one of the world’s finest records of living safely with humans. For example, in Austin, Texas countless thousands of visitors have safely viewed the spectacular emergences of 1.5 million free-tailed bats for decades without a single incident of disease transmission.

I have safely studied bats for more than 60 years, including publishing five articles in their defense in National Geographic. It is sad indeed to see bat survival threatened due to the same, traditionally respected, organization spreading groundless claims that bats can defecate deadly viruses by simply flying overhead. People seldom tolerate and often kill animals they fear, and none are more vulnerable than bats. Please, in your future coverage of Virus Hunters, put bat risks and benefits in perspective. The irresponsible spreading of falsehoods needs to stop.

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Bat Flash! Misleading Article Harms Bats and Public Health

7/17/2020

By Merlin Tuttle

A disappointing number of authors and publishers are spreading the false narrative that bats are exceptionally high-risk sources of deadly viruses. The July 12 edition of The Washington Post contained an article titled, “Why do bats have so many viruses?” The author, Rachel Ehrenberg, was apparently unaware of the most recent analysis of viral risks.

We urge Rachel and other Washington Post journalists to review Mollentze and Streiker’s April 28, 2020 comprehensive analysis, published in the Proceedings of the National Academy of Science. Their paper titled, “Viral zoonotic risk is homogeneous among taxonomic orders of mammalian and avian reservoir hosts” concluded that bats are no more likely than other animals to host disease.

Virus hunters have focused search efforts disproportionately on bats, apparently because bats are exceptionally easy to sample in large numbers and have few defenders. Referring to the Covid-19 outbreak, Zhang and Holmes concluded that surveillance of coronaviruses in animals other than bats is critical to protecting against future outbreaks.

Sensational speculation, exaggerating bat association with scary viruses, has led to a serious bias that impedes our understanding of viral pandemics and creates a perfect storm of media publicity. This feeds into our broader academic crisis—the misallocation of large grants for splashy, attention-getting “research” that promotes career advancement over high-quality, reproducible scientific investigation. Such bias threatens to misdirect limited public health resources and halt, or even reverse, decades of conservation progress.

It’s time publishers, authors, researchers, and decision-makers let go of the premise that bats are uniquely dangerous sources of disease and end biased sampling and unsupported speculation. Instead, we need to identify true sources of human infection and insist on accurate reporting that leads to actual prevention.

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Bat Flash! CNN Misses the Mark

Response to CNN Program “Bats—The Mystery Behind COVID-19″

6/16/2020
By Merlin Tuttle

I applaud Anderson Cooper for his attempt to improve public perceptions of bats. His program included numerous reasons why we should appreciate and protect bats. Nevertheless, producers failed to alleviate needless fear by omission of key facts and addition of misleading narratives. Such approaches unfortunately solidify needless fear and can’t be countered by simply sharing bat values. For bats to be tolerated, fear must be eliminated.

Many researchers were reported to “believe” that COVID-19 came from bats. Bats were claimed to be reservoirs for the standard litany of deadliest diseases, including Ebola, though the source of Ebola and COVID-19 remains a mystery. Bats were clearly stated to harbor more zoonotic viruses than other animals, ignoring recent research refuting such claims. Furthermore, scientists shown studying bats wore sealed suits and full-face respirator protection, sending a strong visual message of danger.

A wonderful array of positive things were said about bats, and their essential ecosystem and economic roles were emphasized. However, without putting disease risks in perspective, advising viewers to respect bats while also warning against living near them is high-risk for negative consequences.  

Human encroachment into bat habitats was blamed for pandemic disease threats. However, it was not explained how expanding human populations could reduce pandemic risks simply by ending logging or invasion of new bat habitats. Nor was it explained how bats, restricted to their protected areas apart from where we live and grow crops, could possibly continue to shield us from mosquitoes in our yards or pests that attack our crops. 

Missing elements were conspicuous by their absence. There was no mention of the fact that millions of bats share cities with humans in America, Africa, Asia, and Australia without associated disease outbreaks. Nor was there mention of how easily disease transmission from bats can be avoided—in most of the world by simply not handling or eating bats. Even more troubling is the fact that program producers were well aware of these omitted facts.

On May 7 and 8, production staff conducted nearly two hours of phone interviews with me and Teresa Nichta and received abundant documentation from us. We even offered outstanding video footage showing the popularity of bat-watching tourism in Austin, Texas and planned to schedule filming at various sites in Texas upon their request. They seemed quite excited about our help, promising to get back to us in a few days with final plans. Then, they simply disappeared. We can’t avoid wondering who nixed the production staff’s enthusiasm for sharing such a key demonstration of bats making safe and invaluable neighbors. I suspect that Anderson Cooper will be surprised if ever he learns of this.

The bottom line — Frightened humans seldom tolerate and often kill bats. Programs that promote fear, regardless of good intentions, threaten bats and their essential services as valued neighbors.  

Please remember, there is no credible science documenting that bats are responsible for the transmission of COVID-19, Ebola, SARS, or MERS, to humans. Anyone implying such transmission is speculating. Be vigilant in your media consumption and sharing! 

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Thank You For Your Voice – Editors are Listening and Bats are Benefiting

By Merlin Tuttle
6/27/19

A reminder that our members DO make a difference! Leading news media outlets are changing tack, publishing more positive, and fewer negative, stories about bats as a direct result of MTBC members’ ongoing support and actions.

Your vigilance brings misleading articles to our attention. Your support enables us to carefully document and explain issues of concern. Your personal, diplomatic comments to editors influence their further actions. Media portrayal of bats cannot be ignored. It is key to broad public understanding and support, without which conservation progress could prove impossible.

The intermediate horseshoe bat (Rhinolophus affinis) ranges from northern India to southern China. It is one of the horseshoe bats speculated, but still unproven to have caused the SARS epidemic.

Since 2014, we’ve prepared and distributed 15 blog posts and 18 Bat Flashes providing counterpoint documentation in response to exaggerated, misleading, and often completely wrong speculation attempting to link bats to rare, but scary diseases. Widely distributed publications included “Give Bats a Break” in Issues in Science and Technology (subsequently translated into French and Chinese), “Fear of Bats and its Consequences” in the Journal of Bat Research and Conservation, and “Humans Shouldn’t Be So Scared of Bats” in Slate. Additionally, the science journal, Nature, published a co-authored response in its correspondence section, titled “Don’t misrepresent link between bats and SARS.” (more…)

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Bat Flash! Scientific Credibility Under Siege—Sound Data Versus Premature Speculation

By Merlin Tuttle
2/21/19

Just as we enter a period of exceptional need for reliable science to protect and restore a healthy planet, too many traditionally prestigious science journals and institutions are rewarding bad science. (1) (2) “Scientists are supposed to relentlessly probe the fabric of reality with the most rigorous and skeptical of methods.” (3) Yet traditionally credible journals like Nature and Science are increasingly publishing sensational speculation, particularly studies attempting to link bats to deadly diseases. (4)

Growing numbers are attempting to prove rather than test hypotheses, sometimes based on a sample of just one viral fragment from a single bat. (5) Kai Kupferschmidt’s article titled, “This bat species may be the source of the Ebola epidemic that killed more than 11,000 people in West Africa,” exemplifies the problem. It is based on a highly questionable sample from one bat, though it appeared in the online news site of the journal Science (January 24, 2019).

The common bent-winged bat lives in caves and cave-like locations from southern Europe to Japan and Southeast Asia to China, the Philippines and Solomon Islands, most of Africa and eastern Australia. It is insectivorous, often feeding on small beetles, and forms large colonies, some exceeding 100,000 individuals.

As is typical in such stories, it begins with a scary question that will grab readership and media attention. That Science title is followed by a emboldened quote stating that “This is an important new lead and it should be followed up extensively.”

Later quotes, less emphasized, admit that only a small viral fragment was found, and that it may have come from an infected insect eaten by the bat. In other words, this bat may have simply eaten an Ebola-carrying insect, completely changing the bat’s role from implied source to controller. Perhaps if virologists weren’t so focused on proving that Ebola comes from bats, they might have found the true source by now.

A growing number of leading virologists are warning that virus hunting, promoted by such articles, is a costly waste. The unsupportable public health promises being made are likely to demean the credibility of science. (6) Scientists need incentives for finding the right answer rather than for simply getting published. (1)

Kupferschmidt’s article ends with a warning that bats shouldn’t be killed. However, as already documented, people seldom tolerate and often kill animals they fear, especially bats. (7) (8)

The New York Times ran a similar account of the same story, authored by Denise Grady. It was titled “Deadly Ebola Virus Is Found in Liberian Bat, Researchers Say.” The author admits “It feels premature scientifically” but fails to admit that the small viral fragment may have come from an infected insect eaten by the bat, making the bat a potential aid in limiting the spread of Ebola. They too, belatedly and ineffectively, admonish not to kill bats.

Sensational and premature reports like these are clearly irresponsible and risk great harm to both scientific credibility and the environment. (more…)

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