News Life Capybaras thrive, even near humans, because they’re not picky eaters The rodents’ flexible diet has helped them adapt to human-modified environments As humans have broken up ecosystems across South America, capybaras have still thrived, possibly by expanding what they eat. Here, a herd of the rodents of unusual size grazes in a park in Curitiba, Brazil. Luciana Calvin/Moment Open/Getty Images Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Rebecca Dzombak March 31, 2023 at 9:00 am Capybaras, the world’s largest rodent, naturally live in vast grasslands, wetlands and rivers throughout South America.