During millennia, humans have tried to scare away the wolves of their cattle. Most of them had no drones.
But a team of biologists who work near the border between California and Oregon yes, and is using them to broadcast ‘thundetruck’ of AC/DC, clips of human and voices live live to the main predators to scare away the cattle in an ongoing experiment.
“I’m not going to endure this anymore!” Shouts actress Scarlett Johansson in a 2019 film clip “Marriage Story.”
“What?
The gray wolves were hunted almost until extinction throughout the west of the United States in the first half of the twentieth century. Since its reintroduction in Idaho and in Yellowstone National Park in the mid -1990s, they have multiplied to the point that a population in the Rocky Mountains of the North has been eliminated from the list of endangered species.
There are now hundreds of wolves in Washington and Oregon, more dozen in northern California and thousands wandering near the great lakes.
Population recovery has meant an increase in conflict with farmers, and increasingly creative efforts by the latter to protect cattle. They have resorted to electrified fences, alarms for wolves, guard dogs, horse patrols, traps and relocation, and now drones. In some areas where non -lethal efforts have failed, officials usually approve the slaughter of wolves, even last week in the state of Washington.
The gray wolves killed about 800 domesticated animals in 10 states in 2022, according to an earlier review of The Associated Pressures of state and federal agencies.
Scientists of the USDA Animal and Plant Health Inspection Service developed the techniques to harass the wolves with drones while monitoring them using thermal image cameras at night, when the predators are more active. A preliminary study published in 2022 showed that adding human voices through a speaker installed in a drone can scare them.
The team documented successful wolf hunts interruptions. When Dustin Rankack, the main researcher of the USDA in the project, saw one for the first time, smiled from ear to ear.
“If we could reduce those negative impacts of the wolves, it would be more likely to lead to a situation in which we have coexistence,” Ranglack said.
Preloaded clips include music recordings, shots, fireworks and voices. A drone pilot begins by reproducing three clips chosen at random, such as the scene of “Marriage Story” or “Thundetruck”, with her shouts and electric guitar lights that bristle the hair.
If that does not work, the operator can improvise shouting through a microphone or reproducing a different clip that is not among random prejustices. One of the favorites is the version of the heavy metal band Five Finger Death Punch of “Blue On Black”, which could reproduce the lyrics “You gave you the way and ran” while the wolves flee.
The USDA drones pilots have continued with the cattle protection patrols this summer while investigating the responses of the wolves in ranches with high levels of conflict along the border between Oregon and California. The patrols extended south to Sierra Valley in August for the first time, according to the California Fishing and Wildlife Department.
It is not clear if the wolves could get used to drones. Wolf shepherds and hunters have dissuaded them for a long time with long lines hung with fabrics that they wave, but wolves can eventually learn that flags are not a threat.
Environmental defenders are optimistic about drones, however, because they allow the wolves to be scared in different ways, in different places.
“The wolves are afraid of new things,” said Amaroq Weiss, a defender of the wolves of the Center for Biological Diversity. “I know that in human imagination, people think of the wolves as big and terrifying creatures that are not afraid of anything.”
There are also inconveniences in technology. A drone with night vision and a speaker costs around $ 20,000, requires professional training and does not work well in forested areas, which makes it very practical for many farmers.
The farmers of northern California who have hosted USDA drones patrols agree that they have reduced cattle deaths so far.
“I am very grateful for what they did. But I don’t think it’s a long -term solution,” said Mary Rickert, the owner of a cattle ranch north of Mount Shasta. “What I fear is that after a period of time, suddenly say: ‘Wow, this is not going to hurt me. It only makes a lot of noise.”
The farmers are compensated if they can prove that a wolf killed their cattle. But there are uncompromising costs of having stressed cows, such as lower birth rates and harder meat.
Rickert said that if drones do not work in the long term, you may have to close the business, in which it has been involved since at least the 1980s. It wants permission to shoot the wolves if they are attacking their animals or if they enter their property after a certain number of attacks.
If technology proves to be effective and costs fall, one day the farmers could simply have to ask the wolves to leave.
Paul Wolf, based in Oregon, yes, Wolf, is the supervisor of the Southwest District of the USDA and the main fan of Five Finger Death Punch among drones pilots. He remembered an early encounter during which a wolf at the beginning simply seemed curious to see a drone, until the pilot spoke to him through the speaker.
“He said: ‘Hey wolf, get out of here,” said Wolf. “The wolf immediately releases cattle and flees.”