Shrinking forests are giving mosquitoes a greater taste for human blood, study suggests
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(NEW YORK) — As forests shrink and wildlife disappears, mosquitoes are increasingly turning to people for their blood meals, a shift that raises real concerns about the potential spread of diseases that affect humans.
A new study published in the journal Frontiers suggests these buzzing, biting insects are playing a growing role in the increased transmission of Zika, yellow fever, dengue and other diseases that mosquitoes pass on to people, thanks in part to disappearing habitats.
Deforestation, which is the widespread clearing of forests, and other human activity has vastly reduced local populations of plants and animals while increasing human populations in the same areas, according to the study.
“Mosquitoes that are normally feeding on other hosts within the habitat can shift to humans if the habitat is no longer suitable for those hosts and they leave,” Laura Harrington, a Ph.D.-level professor of entomology at Cornell University, told ABC News.
Human blood was widely found in nine types of mosquitoes in two formerly uninhabited areas in the state of Rio de Janeiro, Brazil, preliminary study results found. This area was once a part of the Atlantic Forest that covered 502,000 square miles. Today, it has shrunk to 29% of its original size as a result of deforestation and development, according to the final study.
The researchers point to past studies showing that areas with heavier deforestation have a higher mosquito abundance and higher rates of mosquito-borne disease because disturbed habitats favor species that thrive near people. At the same time, reduced biodiversity removes animals that can dilute disease transmission, making humans more likely to become the primary blood source.
Sérgio Lisboa Machado, a co-author of the paper and a professor at Federal University of Rio de Janeiro in Brazil, said mosquitoes are opportunists who don’t venture far to find food.
“So they start searching for humans because mosquitoes rarely fly very long distances,” he told ABC News. “They are not going to pay a lot of energy to find [other food sources].”
More than 17% of all infectious diseases are caused by vector-borne diseases, meaning a disease that’s transmitted to humans by a living organism, such as mosquitoes, ticks, and flies, the World Health Organization (WHO) reports. These biting insects cause more than 700,000 deaths globally.
Mosquitoes alone transmit dozens of serious diseases to humans, according to the WHO, which consequently considers them the deadliest animals on Earth.
Female mosquitoes are the culprit. They must drink blood to get the protein and iron they need to develop their eggs, according to the Centers for Disease Control and Prevention.
There is a “reproductive drive for them to feed on blood, and if there’s no other host there, most mosquitoes would feed on a human,” Harrington told ABC News.
Male mosquitoes buzz, but they don’t bite, instead dining on nectar and plant sugars.
There are 3,500 mosquito species globally, Harrington said, noting that there are only a handful that truly prefer the taste of human blood over other animals. When given a choice, only a small fraction of mosquito species regularly seek out humans.
“It’s something that we’ve known for a long time,” Harrington said. “This notion that manipulating the landscape can alter mosquito feeding patterns and sometimes shift feeding patterns towards humans.”
A general view of wind turbines at the Saint-Nazaire offshore wind farm, off the coast of the Guerande peninsula in western France, in Batz-sur-Mer, on December 3, 2025. (Photo by Jerome Gilles/NurPhoto via Getty Images)
(NEW YORK) — Wind power production will continue to advance, despite the Trump administration’s attempts to halt the growing momentum of renewable energy, experts told ABC News.
On Monday, the U.S. Department of the Interior reached a $928 million deal with French energy company TotalEnergies to end the company’s offshore wind development off the East Coast and redirect that investment into domestic fossil fuel initiatives, describing the “landmark agreement” as a way to lower energy costs and strengthen the nation’s energy security.
The move continues efforts by President Donald Trump and his administration to stall renewable energy, including the Department of Justice suing the state of California earlier this month over its electric vehicle mandate, signing an executive order last month directing the Department of Defense to purchase electricity from coal-fired power plants and the Environmental Protection Agency rescinding the landmark “endangerment finding” that has served as the scientific and legal foundation for federal regulations on carbon dioxide and five other heat-trapping greenhouse gases or more than 16 years.
Offshore wind is facing the most “headwinds” from the federal government, but is still persevering, Erin Baker, distinguished professor and faculty director at the Energy Transition Institute at the University of Massachusetts Amherst, told ABC News. The actions of the Trump administration have had “very little impact” on the global increase in production of renewable energy, Baker added.
What the nearly $1 billion deal with TotalEnergies entails As part of the deal, TotalEnergies will commit $928 million to fossil fuel development in the United States, matching the amount the company previously paid for offshore wind leases. Upon meeting those commitments, the federal government will reimburse the company up to the value of those lease payments, the Interior Department said.
Citing national security concerns, the Interior Department said TotalEnergies has pledged not to develop any new offshore wind projects in the United States.
“This agreement is yet another win for President Trump’s commitment to affordable and reliable energy for all Americans,” Interior Secretary Doug Burgum said in a statement. “Offshore wind is one of the most expensive, unreliable, environmentally disruptive, and subsidy-dependent schemes ever forced on American ratepayers and taxpayers.”
The agreement supports the administration’s push for affordable, reliable baseload energy, officials said, arguing that offshore wind projects are costly and less dependable. Ending the projects would reduce unnecessary federal spending while supporting domestic energy production, according to the Interior Department.
North Carolina Gov. Josh Stein described the move as “a terrible deal for the people of North Carolina and our country” in a post on X.
Because offshore wind is installed in federal waters, the power of the federal government over offshore wind projects is higher than in onshore wind projects, Michelle Solomon, senior policy analyst at Energy Innovation, a non-partisan research and analysis nonprofit that supports clean energy, told ABC News.
“I think the really unfortunate thing about this news is that offshore wind is a really, really reliable resource that can really help mitigate spiking fossil fuel prices in the winter,” she said.
The momentum for wind energy is too strong to stall, experts said Wind is the largest and most reliable source of renewable energy. It can also help energy bills stay affordable during extreme weather due to its capacity to produce fuel-free energy, Solomon said.
The power purchase agreements signed by offshore wind companies suppress electricity prices, Baker said. The companies agree to “always buy the wind when it blows,” which then brings down the entire cost to purchase electricity, she said, describing it as “good business.”
“They’re not doing it for environmental reasons,” Baker said of renewable energy companies. “They’re doing it just for business reasons.”
In 2025, wind and solar energy generated a record 17% of electricity in the U.S., up from less than 1% in 2005, according to data recently released by the Energy Information Administration (EIA).
The total net generation from wind and solar together reached 760,000 gigawatt-hours (GWh) last year, enough to power tens of millions of average American homes, according to the EIA. Wind power generated 464,000 GWh, a 3% increase over 2024.
The milestone comes amid federal energy policy changes, including the early phase-out of renewable tax incentives and other regulatory changes.
“The momentum is definitely still there,” Solomon said.
“Even though [the Trump administration] was actively trying to stop those industries, they still were growing,” Baker said.
Another benefit to wind is that it’s the type of energy that can “come online the most quickly” after it is built, Solomon said.
“In this moment, when we’re needing to build electricity generation resources really quickly to deal with low growth, data centers, [wind farms] are the ones that are going to be able to respond really quickly,” she said.
Wind and solar made up nearly 90% of new U.S. electricity capacity in 2025, according to the Federal Energy Regulatory Commission. That trend is expected to continue into 2026, Solomon said.
Global renewable energy capacity is expected to more than double by 2030, according to the EIA.
Trump has long criticized wind energy Trump’s criticism of wind turbines dates back to his first term.
In 2019, Trump claimed that noises from wind turbines “cause cancer” and negatively impact property values. In 2024, during his presidential campaign, Trump stated that wind turbines “kill whales” and vowed to write an executive order on “Day 1” to end offshore wind projects.
On Jan. 20, 2025, the first day of his second term, Trump signed an executive order to withdraw all areas of the outer continental shelf from offshore wind leasing. A federal judge in the U.S. District of Massachusetts ruled in December that the stop to permits on wind farms was illegal.
The deal with TotalEnergies is the latest move by the administration in an attempt to halt the increased production of wind power.
In December 2025, the Interior Department froze large offshore wind projects on the East Coast, citing national security concerns. Federal judges ruled that all five projects could resume construction, concluding that the government did not show that the risk was so imminent that it should stop.
The projects included Empire Wind, the wind farm being built 15 to 30 miles south of the coast of Long Island, and the Coastal Virginia Offshore Wind, which started delivering to the state’s power grid on Monday, developer Dominion Energy announced.
Despite the victories for the offshore wind developers, the delays to the project have led to an uncertain investment environment and increased both the cost to build and the costs to consumers’ energy bills, Solomon said.
The impact of these actions will raise energy costs in the end, Solomon said.
A memorial dedicated to the 19 children and two adults murdered on May 24,2022 during a mass shooting at Robb Elementary School is seen on January 05, 2026 in Uvalde, Texas. (Photo by Brandon Bell/Getty Images)
(UVALDE, Texas) — Javier Cazares, whose 9-year-old daughter Jackie was killed in the Uvalde, Texas, mass shooting, said he feels failed again after a jury on Wednesday night acquitted former school district police officer Adrian Gonzales on all 29 counts of child endangerment.
“We had a little hope, but it wasn’t enough,” Cazares said outside court. “Again, we are failed. I don’t even know what to say.”
Prosecutors had alleged Gonzales did not follow his training and endangered the 19 students who died and an additional 10 students who survived the May 24, 2022, Robb Elementary School mass shooting. Gonzales’ lawyers argued he was unfairly blamed for a broader law-enforcement failure that day.
Cazares said he was hopeful that the jury might have reached a different conclusion, but “prepared for the worst.”
“I need to keep composed for my daughter. It has been an emotional rollercoaster since day one. I am pissed,” he said.
Jackie’s uncle, Jesse Rizo, told reporters he was concerned about the message the verdict might send to police officers who respond to future mass shootings.
“I respect the jury’s decision, but what message does it send?” he said. “If you’re an officer, you can simply stand by, stand down, stand idle, and not do anything and wait for everybody to be executed, killed, slaughtered, massacred.”
Jackie’s aunt, Julissa Rizo, pushed back on the defense narrative that Gonzales responded as best he could, telling ABC News, “That’s not true.”
“There were two monsters on May 24. One was the shooter, and the other one was the one that never went in, that could have avoided this,” she said.
Defense attorney Jason Goss told reporters that he believes the acquittal clears Gonzales’ name.
“The evidence showed that not only did he not fail, but he put himself in great danger,” Goss said.
Gonzales told ABC News he plans on “picking up the pieces and moving forward.”
Defense attorney Nico LaHood said he will continue to pray for the victims’ families.
“We understand that their separation from their loved one is going to be felt as long as they walk on this earth, and we don’t ignore that. We acknowledge that,” he said. “We’re just going to continue to pray for them.”
Cazares said he will attend the trial of the other officer charged, former Uvalde Schools Police Chief Pete Arredondo.
Arredondo, who was the on-site commander on the day of the Robb Elementary shooting, is also charged with endangerment or abandonment of a child and has pleaded not guilty. His case has been delayed indefinitely by an ongoing federal lawsuit filed after the U.S. Border Patrol refused repeated efforts by Uvalde prosecutors to interview Border Patrol agents who responded to the shooting, including two who were in the tactical unit responsible for killing the gunman at the school.
ABC News’ John Quiñones and Emily Shapiro contributed to this report.
In this photo released by the Norfolk Police Department, first responders are shown at the scene of a shooting at Old Dominion University in Norfolk, Virginia, on March 12, 2026. (Norfolk Police Department)
(NORFOLK, Va.) — Two people are injured and a gunman is dead following a shooting at Old Dominion University in Norfolk, Virginia, on Thursday, according to an alert from the university.
The gunman opened fire in Constant Hall, an academic building, around 10:49 a.m., the university alert said.
The injured victims have been taken to a local hospital, the school said.
The school did not say how the gunman died.
Classes are canceled for the rest of the day, the university said.
This is a developing story. Please check back for updates.
