10 Surprising Facts About Animal Sex

iStock/Dias Studio
iStock/Dias Studio

Homo sapiens do not have a monopoly on strange sex. Peculiar mating rituals are prevalent throughout the animal kingdom. While writing my book Sex Weird-o-Pedia, these were the 10 most interesting animal sex facts I came across.

1. Turtle mating sounds make for good special effects.

It turns out that animal mating sounds can be really useful for capturing people’s attention. When the filmmakers of Jurassic Park wanted to create velociraptor sounds, they used recordings of tortoises getting it on.

2. Sharks have versatile birthing methods.

Rare close-up encounter with wild endangered species Zebra Leopard Shark (Stegostoma fasciatum
iStock/Placebo365

Australian scientists claim to have found a shark that gives virgin births. They studied a female zebra shark named Leonie, who laid eggs despite not being around a male shark in three years. Several years before her virgin birth, Leonie gave birth after mating with a male shark. She is believed to be the first known shark to reproduce both sexually and asexually.

3. Worms have really long dry spells.

You think it's been a long time since you've been intimate with someone? You've got nothing on worms. After sequencing the DNA of asexual translucent worms, NYU researchers discovered that one species, Diploscapter pachys, had not had sex for about 18 million years. This makes Diploscapter pachys one of the oldest known asexual species.

4. Fine fragrances turn big cats on.

Calvin Klein colognes have sex appeal to animals, too. Captive tigers and jaguars have become stimulated by the brand’s Obsession for Men scent. Forest rangers have used the scent to lure tigers out of the wild.

5. Barnacles have adaptable penises.

A close-up of barnacles on a rock
iStock/Photoshopped

Barnacles may have the most interesting penises in the animal kingdom. Their penises can stretch up to eight times the length of their body. And while many species' manhoods can change size, few can alter their shape. But researchers in Alberta found that barnacles that live in gentle waters have long and thin penises that are good for reach, while those in rough waters have short and wider penises that are better for holding off strong waves. The researchers then transported rough water barnacles to calmer waters and vice versa and found that after getting moved around, the barnacles adjusted their penis's shape to better fit their environment.

6. Water bugs mate loudly.

The water bug species Micronecta scholtzi are the loudest animal in the world relative to their size. The tiny critter reaches nearly 100 decibels when it rubs its penis against its abdomen. Basically, there is a rock concert going on whenever this bug releases a mating call.

7. Ducks defend themselves with their vaginas.

Duck penises can be terrifying: They are long and corkscrew-shaped and they can be used like a lasso to pull in females who are trying to escape unwanted advances. To fend off unwelcome mating attempts from overeager males, female ducks have evolved vaginas that twist in the opposite direction of their male counterparts’s corkscrew penises. Discover magazine referred to duck vaginas as “organic chastity belts."

8. Most birds don’t have penises.

Close-up of an ostrich
iStock/sasapanchenko

Just 3 percent of bird species have penises. Ostriches and ducks have them, but eagles and penguins do not. When birds get erections, their penises fill up with lymph fluid instead of blood. Birds without penises transfer sperm from male to female via what is known as a cloacal kiss.

9. Male birds are desperate to impress potential mates.

As long as humans have been on Earth, guys have done incredibly stupid things to try to impress women. Male birds are not immune to this dynamic.

Little birds like chickadees will group together to take on larger predators. It has generally been assumed that they do this for protection purposes, but researchers in Brazil came to a different conclusion: The researchers created a few fake owls, one from a species that regularly eats smaller birds and another from a less threatening owl species. They found that across 79 different species of small birds, the less threatening owl was attacked more often by the smaller birds. Their conclusion was that the small birds used the weaker opponent as an opportunity to showcase their defense skills to potential mates.

10. Unlike humans, animals have gotten frisky in space.

According to NASA, no humans have ever had sex in space. But other animal species have been more active with their sexuality and reproductivity outside our atmosphere.

The first pregnant mammals to fly in outer space aboard a U.S. spacecraft were rats, and frogs have conceived in orbit.

In an effort to better understand how reproduction works in the absence of gravity, Russia’s space agency launched five geckos into orbit in 2014 so that they could observe how the lizards had sex in space. Sadly, the geckos froze to death before they touched back down to Earth.

In 2018, NASA scientists began a mission that involved sending human and bull sperm to outer space. Their intention was to study how microgravity affects the motility of sperm cells. Because if humans are to ever colonize space, we must boldly bone where no one has boned before.

Ross Benes is the author of the new book Sex Weird-o-Pedia: The Ultimate Book of Shocking, Scandalous, and Incredibly Bizarre Sex Facts.

Invasive Snakehead Fish That Can Breathe on Land Is Roaming Georgia

Mohd Fazlin Mohd Effendy Ooi, Flickr // CC BY 2.0
Mohd Fazlin Mohd Effendy Ooi, Flickr // CC BY 2.0

A fish recently found in Georgia has wildlife officials stirred up. In fact, they’re advising anyone who sees a northern snakehead to kill it on sight.

That death sentence might sound extreme, but there’s good reason for it. The northern snakehead, which can survive for brief periods on land and breathe air, is an invasive species in North America. With one specimen found in a privately owned pond in Gwinnett County, the state wants to take swift action to make certain the fish, which is native to East Asia, doesn’t continue to spread. Non-native species can upset local ecosystems by competing with native species for food and habitat.

The Georgia Department of Natural Resources’ Wildlife Resources Division is advising people who encounter the snakehead—a long, splotchy-brown fish that can reach 3 feet in length—to kill it and freeze it, then report the catch to the agency's fisheries office.

Wildlife authorities believe snakeheads wind up in non-native areas as a result of the aquarium trade or food industry. A snakehead was recently caught in southwestern Pennsylvania. The species has been spotted in 14 states.

[h/t CNN]

Meet Holly: The Winner of Alaska's ‘Fat Bear Week’ Competition at Katmai National Park

Katmai National Park and Preserve via Flickr, Public Domain
Katmai National Park and Preserve via Flickr, Public Domain

It's that time of year when the air gets a little colder, the days get a little shorter, and the bears get much, much fatter. Every year, in celebration of the impressive, pre-hibernation transformations of its brown bears, Alaska's Katmai National Park and Preserve hosts a competition to determine which fat bear reigns supreme. As NPR reports, Holly (a.k.a. Bear 435) is the official winner of 2019's Fat Bear Week.

In order to build enough bulk to survive the winter, brown bears must eat a year's worth of food in six months. After gobbling as much salmon as they can find, their mass typically peaks in October, which is also when Katmai holds its annual competition.

This year, the park pitted 12 coastal brown bears against each other in a March Madness-style bracket. Images of the chunky contestants were shared on Facebook, and followers cast votes for their favorite fat bears by "liking" them.

A before and after shot of Holly, winner of Katmai National Park and Preserve's Fat Bear Week competition
Katmai National Park and Preserve via Flickr, Public Domain

Holly beat runner-up Lefty by nearly 14,000 votes. The before-and-after shot above makes it easy to see why: Between July 12 and September 22, 2019, she grew from a scrawny bear into a hulking beast. The preserve announced her win on Facebook, writing: "She is fat. She is fabulous. She is 435 Holly. And you voted her the 2019 Fat Bear Week Champion. All hail Holly whose healthy heft will help her hibernate until the spring. Long live the Queen of Corpulence!"

Holly's new body is good for more than making her an internet sensation. The fatter a bear is, the more likely it is to survive the winter. But other factors, like climate change waking hibernating bears earlier than usual, still pose a threat.

[h/t NPR]

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