3-Legged Lion Sets Swimming Record in Crocodile-Filled River

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When night fell on Uganda’s second-largest national park in early February, Jacob, a three-legged African lion, made several attempts to cross a dangerous channel with his brother, Tibu.

They seemed to do so in retreat. Earlier, the siblings had strayed into the “established territory of several other male coalitions” in search of lionesses, but simply “got the hell kicked out of them,” Griffith University scientist Alexander Braczkowski told Gizmodo. The lions’ aquatic journey began in the aftermath of “at least two fights,” and after Jacob had lost his foot to a poacher’s trap.

The lions repeatedly entered the Kazinga channel in darkness but doubled back three times, “due to what appears to be encounters with either hippopotamus or Nile crocodiles,” Braczkowski and his collaborators wrote in an upcoming paper accepted in the scientific journal Ecology and Evolution. On their fourth try, the siblings successfully swam as far as 1.5 killometers, or 0.93 miles, to reach the other side.

The lions had made this crossing before, likely “due to sexual reasons” and the “strong” presence of humans at the only available land connection, the researchers said. Yet, this was the first time anyone’s captured such a swim on film. “Jacob was actually in quite a bad way when he did cross,” added Braczkowski.

Braczkowski led the expedition in Uganda’s Queen Elizabeth National Park, with funding from Queensland, Australia’s Griffith University and Northern Arizona University. “It was pretty dramatic,” Braczkowski told the New York Times. The lions look “like two tiny little heat signatures crossing an ocean,” he said, remarking on footage captured by Cape Town videographer Luke Ochse.

Researchers filmed the journey just after 10 PM local time, using a H20T thermal camera and a DJI Matrice 300 drone, while keeping a distance of 50-70 meters, or around 200 feet.

Image: Dr. Alex Braczkowski

Humans have documented African lions on shorter aquatic journeys, usually no farther than 100 meters, or around 0.06 miles, according to the paper. Members of the vulnerable species aren’t known to be big on swimming. Jaguars, on the other hand, are “well known for their swimming ability in wetlands like the Pantanal and in floodplain forests in Brazil,” the researchers noted.

Braczkowski thinks an unhealthy sex ratio inspired the channel crossings originally, due to poaching as well as farmers who poison lions to protect their livestock. The lead researcher estimated that around 60,000 people live in the national park, “mainly through 11 fishing villages that were demarcated in the 60s.”

Beyond Jacob’s and Tibu’s quests for sex and territory, the swim reflects how the planet’s “most imperiled and iconic wildlife are facing tough decisions under increasing human pressure,” the researchers wrote. “Swimming across rivers and water bodies filled with high densities of predators is one such example.” The biologists closed their paper with a call for more research into the connection between long swims and the functional habitats of big cats in areas now dominated by humans.

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