Yes, this cephalopod is looking at you funny. It’s a kind of cockeyed squid—an animal that looks like some jokester misassembled a Mr. Potato Head. One of the cockeyed squid’s eyes is big, bulging and yellow. The other is flat and beady. After studying more than 25 years’ worth of undersea video footage, scientists think they know why. Read More
The African puff adder is one of the most dangerous venomous snakes on the continent. To find prey, it doesn’t need to go hunting; the snake simply lies in wait and attacks small animals that wander past. An ambushing puff adder is both camouflaged and unsmellable to predators. This snake is not goofing around—but it does like to stick its tongue out. Researchers discovered that puff adders in the wild waggle both their tongues and their tails to lure prey, like a prolonged and high-stakes hokey-pokey dance.
Xavier Glaudas, a postdoc at the University of the Witwatersrand in South Africa, and herpetology lab director Graham Alexander didn’t set out to study any bizarre new snake behaviors. They simply wanted to watch puff adders hunting in the wild, Glaudas says. They used a simple strategy no one had tried before: pointing videocameras at puff adders and watching for a long, long time. Read More
Maybe you’re feeling like the animal you most identified with in previous years (panda bear in snow, puggle, Betty White) just isn’t adequate for 2017. If that’s the case, here are three creatures that would like to apply for the job. Only one is venomous. Read More
After a late dinner, a jungle-dwelling whip spider can’t rely on an Uber driver to get her home. She has to find the way herself, in the pitch-black, picking her way over thick undergrowth to reach the tree she lives on. It’s a trick she can even manage when plucked from her home tree and tossed into the forest at random, up to 10 meters away. Now scientists think whip spiders don’t use her eyes for this homing feat—they use their feet. Read More
You might expect city-dwelling birds to be savvy about traffic. Birds didn’t evolve around giant, motorized predators made of metal—but once they realize how quickly a cab or bus can bear down on them, they should take heed. A recent study, though, found that pigeons do just the opposite.
Travis DeVault is a wildlife biologist for the U.S. Department of Agriculture’s National Wildlife Research Center. Based in Ohio, he looks for ways to keep birds, bats, deer and other animals from being struck by cars, planes and helicopters. These kinds of collisions are bad news for the animals, obviously, but are also dangerous for humans. Read More
Seeking a role model for fatherhood? Look no further than an enormous, secretive salamander who only sometimes eats his babies.
You’re not likely to stumble across a Japanese giant salamander in the wild, and if you did you might wish you hadn’t. These oversized amphibians are the golems of the animal world: bloated and tiny-eyed, they lurk in stream banks like animated sacks of mud. Andrias japonicus can grow almost 5 feet long, making it smaller than its Chinese cousin but larger than the related North American hellbender (a.k.a. “snot otter”). Japanese giant salamanders are rare and shy, though, so you won’t see one unless you go searching.
Scientists in Japan spied on two of the elusive animals to follow up on earlier hints that the blobby creatures might be great parents. Not the moms, that is—they skip out after leaving their eggs—but the dads. Read More
Pity the insect that tumbles into a pitcher plant’s trap. The slippery walls and waiting pool of water ensure it won’t clamber back out. There’s nothing left to do but wait to be digested.
The California pitcher plant (Darlingtonia californica) is also called the cobra lily for its curled-over shape that hides its exit from its victims. Unlike other pitcher plants, it doesn’t fill its trap from above with rainwater but from below, drawing water up with its roots. But like others, it seems to use bacteria living in that well to help digest its prey.
The bacteria perform another role too: making the liquid even harder for an insect to escape than ordinary water. Read More
“I was at a conference, and a colleague was talking about the locomotion of great apes in the trees,” says Lewis Halsey, a physiologist at the University of Roehampton in London. The colleague mentioned that it’s tough to measure how these animals use energy. That’s when Halsey had an epiphany. “I was working with parkour athletes on another project,” he says, studying how much energy the athletes used while jumping and climbing around a city. Why not use these human athletes to stand in for tree-living apes?
In the forests of West Africa, bands of handsome primates called Diana monkeys roam the tree branches. Each group has just one male and several females with their babies. The tradeoff for his apparently cushy living situation is that the male has to chase off predators. His female companions use specific calls to tell him what kinds of threats are nearby. And he responds to whatever they tell him—even if it goes against his own judgment.
Is your dog a natural athlete or a couch pup-tato? The answer might depend on how far removed it is from its wild ancestors. Dogs that are more similar to wolves have kept more of their natural athleticism, while breeding has rendered other types of dogs a little…less impressive.
Caleb Bryce, a PhD candidate at UC Santa Cruz, says his study of canine athletes came about serendipitously. “We were just hoping to calibrate a new wildlife collar we’ve developed,” he says; he planned to test the collars on “a dog or two” before using the technology to study how wolves use energy. But the collars revealed so much variation between those dogs in energy use that Bryce and ecophysiologist Terrie Williams decided to investigate further.
The researchers looked at 23 adult dogs, divided into three groups. One was “northern breeds,” or sled dogs: these included Siberian huskies, Alaskan malamutes, and Samoyeds. Another group was Plott hounds, a dog bred for tracking game by scent. The third group was made up of retrievers, including golden retrievers and labs. Read More