This article, by Sharon Guynup, originally appeared on Mongabay.

In Hawaii and elsewhere in the North Pacific, few hatchlings are emerging from the nests of endangered hawksbill and green sea turtles. In Wisconsin, some tree swallows have failed to produce offspring. In California, infectious diseases are now more common in southern sea otters. In Michigan, bluegills are swimming slower. In the Arctic, some hooded seals and their pups have thyroid problems. And in North Carolina’s Cape Fear River, American alligators have been found with lesions and unhealed, infected wounds.

Today’s celebration of World Wildlife Day is a perfect time to focus greater attention on the rapidly growing Latin America-to-Asia wildlife trade. It now has reached crisis proportions, with both illegal and legal shipments rising in tandem with China’s economic investment in the region.

Experts link this mushrooming trans-Pacific animal trade to large-scale development projects by Chinese companies. Over the past 15 years, two state-owned Chinese banks have loaned more than $140 billion for infrastructure, road, railway and mining projects in Latin America.

As the novel COVID-19 coronavirus swept the planet in early 2020, researchers scrambled to find effective treatments and vaccines. Within a year, there was a clarion call from heads of state, the World Health Organization (WHO) and other agencies to create an international “pandemic preparedness and response” treaty. WHO noted that COVID-19 offered “a stark and painful reminder that nobody is safe until everyone is safe” from zoonotic disease outbreaks.

While the pangolin’s thick overlapping scales protect it from predators such as lions, this animal is an easy mark for illegal wildlife traffickers. Image courtesy of the Tikki Hywood Foundation, Zimbabwe.

Acting on a tip, Nigerian customs operatives raided an apartment in the southwest city of Ikeja in February. Inside, they found some 4,400 pounds of pangolin scales, and 218 ivory tusks—and arrested a Chinese suspect, Ko Sin Ying, who lived there.

A few months earlier, at the other end of a well-worn trade route, Chinese customs officials made the largest-ever seizure of pangolin scales in the port of Shenzhen. They discovered an “empty” shipping container that had come in from Africa—stuffed with 13 tons of scales. They were packaged in bags that camouflaged their true contents beneath a veneer of charcoal. That haul had killed an estimated 20,000 to 30,000 animals, each about as big as a medium-sized dog.

For the past few years, much of my work as a journalist has focused on wildlife and environmental crime. I’ve covered poaching busts and seizures of everything from pangolin scales and big-cat skins to rhino horn, live turtles and songbirds. I’ve reported on the Asian, African and South American markets that sell animals live, dead and in parts, and about the consumers that drive this black-market trade. I’ve written about China, the largest consumer, where many endangered species products are luxury items bought by the wealthiest and most influential as a way to flaunt power and gain prestige. I’ve also explored the trade here in the United States — the world’s second largest consumer. I covered the ubiquitous bird trade in Latin America, where ownership of pet parrots and other birds is so rampant that few realize these animals are endangered, or that it’s against the law to buy or keep them.

From 1990 to 2013, the notorious tiger poacher Kuttu Bahelia and his extended family – brothers, uncles, and their wives and children – reportedly killed hundreds of tigers and leopards in the tiger-rich Indian states of Maharashtra and Karnataka, according to law enforcement informants and media reports. “Even if half that [estimate] is correct, it is still a very significant number,” says Belinda Wright, who directs the non-profit Wildlife Protection Society of India (WPSI).