Why Tiny Dogs Lift Their Legs So High While Peeing

iStock
iStock

If you’ve ever crossed paths with a chihuahua, you’ll know that some of the tiniest dogs bark the biggest game. They often growl at and chase after dogs double their size, and according to a new theory, they may aim higher while peeing to make themselves seem mightier than they look.

Smaller dogs do tend to lift their legs at a higher angle to achieve a greater “pee height,” animal behavior researcher Julie Hecht writes for Scientific American. These findings, published in the Journal of Zoology, come from Betty McGuire, a dog researcher who is something of an expert on canine whizzing. McGuire, of Cornell University, studies dog urinary behavior, particularly as it relates to social and scent-marking habits.

Dog urine holds key information about the dog that left its mark, allowing dogs to communicate with each other from a distance (although anyone who has ever tried to stop a dog from sniffing every telephone pole they pass probably knows that). But what researchers didn’t know was whether dog pee height corresponded with the size of the dog.

“Small males seemed to make an extra effort to raise their leg high—some small males would almost topple over,” McGuire tells New Scientist. “So, we wondered whether small males try to exaggerate their body size by leaving high urine marks.”

For this study, McGuire and her colleagues took 50 healthy adult shelter dogs (neutered and "intact," if you must know) of different breeds out on walks and recorded them peeing—for science, of course. Researchers then used the video footage to determine the angle of a dog’s raised leg as well as the height of the urine mark. When compared to information about a dog’s height and mass, they learned that pee height does accurately reflect a dog’s size in some cases—just not when it comes to smaller dogs.

McGuire told Scientific American that smaller dogs tend to “cheat” by raising their leg higher to achieve a higher trajectory. This may be because they want to seem larger in order to avoid conflicts with more imposing dogs. Another theory posits that smaller dogs might be trying to “over mark,” or cover up another dog’s pee—a behavior that’s common in mammals.

For more conclusive results, we'll just have to wait for the next doggy urine study to leak.

[h/t Scientific American]

A Dracula Ant's Jaws Snap at 200 Mph—Making It the Fastest Animal Appendage on the Planet

Ant Lab, YouTube
Ant Lab, YouTube

As if Florida’s “skull-collecting” ants weren’t terrifying enough, we’re now going to be having nightmares about Dracula ants. A new study in the journal Royal Society Open Science reveals that a species of Dracula ant (Mystrium camillae), which is found in Australia and Southeast Asia, can snap its jaws shut at speeds of 90 meters per second—or the rough equivalent of 200 mph. This makes their jaws the fastest part of any animal on the planet, researchers said in a statement.

These findings come from a team of three researchers that includes Adrian Smith, who has also studied the gruesome ways that the skull-collecting ants (Formica archboldi) dismember trap-jaw ants, which were previously considered to be the fastest ants on record. But with jaw speeds of just over 100 miles per hour, they’re no match for this Dracula ant. (Fun fact: The Dracula ant subfamily is named after their habit of drinking the blood of their young through a process called "nondestructive cannibalism." Yikes.)

Senior author Andrew Suarez, of the University of Illinois, said the anatomy of this Dracula ant’s jaw is unusual. Instead of closing their jaws from an open position, which is what trap-jaw ants do, they use a spring-loading technique. The ants “press the tips of their mandibles together to build potential energy that is released when one mandible slides across the other, similar to a human finger snap,” researchers write.

They use this maneuver to smack other arthropods or push them away. Once they’re stunned, they can be dragged back to the Dracula ant’s nest, where the unlucky victims will be fed to Dracula ant larvae, Suarez said.

Researchers used X-ray imaging to observe the ants’ anatomy in three dimensions. High-speed cameras were also used to record their jaws snapping at remarkable speeds, which measure 5000 times faster than the blink of a human eye. Check out the ants in slow-motion in the video below.

Plano, Texas Is Now Home to a Dog-Friendly Movie Theater

K9 Cinemas
K9 Cinemas

For dog owners in Plano, Texas, movie night with Fido no longer just means cuddling on the couch and browsing Netflix. The newly opened K9 Cinemas invites moviegoers—both human and canine—to watch classic films on the big screen.

The theater operates as a pop-up (or perhaps pup-up?) in a private event space near Custer Road and 15th Street in Plano. On the weekends, patrons can pay $5 for dogs, $9 for kids, and $12.50 for adults to see popular movies in the 50-seat space. Snacks—both the pet and people kind—are available for $2 apiece. Dogs are limited to two per person, and just 25 human seats are sold per showing to leave room for the furry guests.

Pet owners are asked follow a few rules in order to take advantage of what the theater has to offer. Dogs must be up-to-date on all their shots, and owners can submit veterinary records online or bring a hard copy to the theater to verify their pooch's health status. Once inside, owners are responsible for taking their dog out for potty breaks and cleaning up after any accidents that happen (thankfully the floors are concrete and easy to wipe down).

K9 Cinemas is currently showing Elf (2003) and Home Alone (1990) for the holiday season. Dog and movie enthusiasts can buy tickets online now, or wait until January when the theater upgrades from padded chairs to couches for optimized puppy snuggle time.

SECTIONS

arrow
LIVE SMARTER