This Is the World’s Deadliest Animal

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By Douglas A. McIntyre Published
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This Is the World’s Deadliest Animal

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What animal kills the most humans every year? Based on several sets of research, humans are among the top killers of humans, but a small number of species are more dangerous. First among these are mosquitoes, which kill approximately a million people a year. Humans are second, killing about 475,000 other humans.
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While mosquitoes are the deadliest animals, there is some debate over whether the 1 million per year figure is too high. According to GatesNotes, the official blog of Bill Gates, the accurate figure is 725,000. He writes:

What makes mosquitoes so dangerous? Despite their innocuous-sounding name—Spanish for “little fly”—they carry devastating diseases. The worst is malaria, which kills more than 600,000 people every year; another 200 million cases incapacitate people for days at a time. It threatens half of the world’s population and causes billions of dollars in lost productivity annually. Other mosquito-borne diseases include dengue fever, yellow fever, and encephalitis.

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Gates adds that there are approximately 2,500 species of mosquitoes and they live on every continent other than Antarctica.

CBS puts deaths from mosquitoes at 820,000. CNET puts the figure at 1 million. CNET editors write:

According to the World Health Organization, mosquito bites kill 1 million people each year. Most of these are caused by malaria, though West Nile virus and dengue fever are also potentially deadly mosquito-borne diseases.

Gates makes an interesting observation. Mosquitoes don’t kill humans. The diseases they carry do. So, do they belong at the top of the list?

Click here to read all 24/7 Wall St. animal coverage.
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Photo of Douglas A. McIntyre
About the Author Douglas A. McIntyre →

Douglas A. McIntyre is the co-founder, chief executive officer and editor in chief of 24/7 Wall St. and 24/7 Tempo. He has held these jobs since 2006.

McIntyre has written thousands of articles for 24/7 Wall St. He is an expert on corporate finance, the automotive industry, media companies and international finance. He has edited articles on national demographics, sports, personal income and travel.

His work has been quoted or mentioned in The New York Times, The Wall Street Journal, Los Angeles Times, The Washington Post, NBC News, Time, The New Yorker, HuffPost USA Today, Business Insider, Yahoo, AOL, MarketWatch, The Atlantic, Bloomberg, New York Post, Chicago Tribune, Forbes, The Guardian and many other major publications. McIntyre has been a guest on CNBC, the BBC and television and radio stations across the country.

A magna cum laude graduate of Harvard College, McIntyre also was president of The Harvard Advocate. Founded in 1866, the Advocate is the oldest college publication in the United States.

TheStreet.com, Comps.com and Edgar Online are some of the public companies for which McIntyre served on the board of directors. He was a Vicinity Corporation board member when the company was sold to Microsoft in 2002. He served on the audit committees of some of these companies.

McIntyre has been the CEO of FutureSource, a provider of trading terminals and news to commodities and futures traders. He was president of Switchboard, the online phone directory company. He served as chairman and CEO of On2 Technologies, the video compression company that provided video compression software for Adobe’s Flash. Google bought On2 in 2009.

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