Meet The World’s Weirdest Primate. Hints: It Uses Its Finger Like A Woodpecker’s Beak

InnovationScienceMeet The World’s Weirdest Primate. Hints: It Uses Its Finger Like A Woodpecker’s BeakByScott Travers,Contributor.Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world.Follow AuthorMay 10, 2026, 08:30am EDT--:-- / --:--This voice experience is generated by AI. Learn more.This voice experience is generated by AI. Learn more.With rodent teeth, bat-like ears and a woodpecker-inspired hunting strategy, this primate may just be one of evolution’s strangest experiments.gettyThe aye-aye looks almost nothing like a primate. Most would describe it as a creature assembled from spare animal parts. It has oversized ears like a bat, teeth like a rodent and glowing eyes like an owl. But its most famously bizarre feature is its middle finger: impossibly long, unnervingly thin and jointed in a way that gives it an almost spider-like range of motion.For centuries, scientists struggled to classify it. Early naturalists thought it might be a squirrel. Others compared it to a woodpecker. And, strangely, both were onto something.This is because the aye-aye does something no other primate is known to do at such an extreme level: it hunts hidden insect larvae inside wood, using a technique remarkably similar to the way woodpeckers forage. And according to decades of research, nearly every strange feature of its anatomy appears to serve that one extraordinary lifestyle.A Primate That Hunts By Tapping On TreesThe aye-aye (Daubentonia madagascariensis) is found exclusively in the forests of Madagascar. Its most famous behavior is what’s known as “percussive foraging,” described in detail in a seminal 1991 study published in Animal Behaviour, based on observations of two adult males, one adult female and her infant daughter.The animal moves through the canopy, typically after dark, and it pauses every few seconds to drum rapidly on tree branches with its elongated middle finger. The taps are...