Per the article, they didn't remove the livers, only depleted the macrophages:

"We found that after macrophage depletion, pigeons flying under overcast conditions lacked their usual orientation capabilities," they said.

Also:

When the sun was visible, the birds' orientation was unimpaired, suggesting that visual and solar-based cues were another of the pigeons' navigation methods.

Still, the technology has its weaknesses. Kim said the system carries a hallucination rate of about 15 percent, including instances where it misidentifies an object as a person, which is why human judgment remains the final call.

Don't worry, they treat it as a tool, like how people treat doorbell cameras with motion detection.

Oops, my bad for didn't read the whole article.

Still, the technology has its weaknesses. Kim said the system carries a hallucination rate of about 15 percent, including instances where it misidentifies an object as a person, which is why human judgment remains the final call.

The AI only flagged the people (or the objects it misidentified as people), but the human still decides whether those people are worth checking on. I think it still the human's fault if a lot of innocent people get harrassed by the police.

... triggers an alarm if an object identified as a person remains for more than 300 seconds in a bridge’s “loitering zones” ...

I don't know how the AI can hallucinates in such scenario, but it's better to harass some people to prevent some other people from committing suicide on those bridges.

Those people in the control center should keep an eye on multiple bridges across the Han river 24/7, with multiple sections for each bridge. I think it's a good thing to use AI in this case to reduce the human errors and weaknesses.

Those bears are living in mountainous areas with forest cover. One of the causes of the bear population boom was the declining number of hunters in those areas. The Japanese government had allocated 3.4 billion yen (around 21 million US dollars) for "bear countermeasures" in 2025. They also had already deployed soldiers to put traps and allowed the police to shoot and kill bears when necessary.