HTML tutorial HTML tutorial

Beware: The Praying Mantis Wants Your Brain

So a cat, a tigress and a ninja walk into a bar...
User avatar
Spiritwind
Posts: 1050
Joined: Fri Feb 20, 2015 4:24 pm
Location: Inland NW, U.S.
Has thanked: 2183 times
Been thanked: 2468 times
Contact:

Beware: The Praying Mantis Wants Your Brain

Postby Spiritwind » Sun Oct 01, 2017 5:27 pm

I couldn't hardly believe my eyes when I saw this. Talk about creepy. It was kind of a HFW, for me anyway.

Beware: Praying Mantis Wants Your Brain
https://www.nytimes.com/2017/09/22/scie ... .html?_r=0


Tom Vaughn, a photographer then living in Colorado’s Mancos Valley, kept a hummingbird feeder outside his house. One morning, he stepped through the portico door and noticed a black-chinned hummingbird dangling from the side of the red plastic feeder like a stray Christmas ornament.

At first, Mr. Vaughan thought he knew what was going on. “I’d previously seen a hummingbird in a state of torpor,” he said, “when it was hanging straight down by its feet, regenerating its batteries, before dropping down and flying off.”

On closer inspection, Mr. Vaughan saw that the hummingbird was hanging not by its feet but by its head. And forget about jumping its batteries: the bird was in the grip of a three-inch-long green praying mantis.

The mantis was clinging with its back legs to the rim of the feeder, holding its feathered catch in its powerful, seemingly reverent front legs, and methodically chewing through the hummingbird’s skull to get at the nutritious brain tissue within.

“It was staring at me as it fed,” Mr. Vaughan said. “Of course, I took a picture of it.” Startled by the clicking shutter, the mantis dropped its partially decapitated meal, crawled under the feeder — and began menacing two hummingbirds on the other side.

“Talk about cognitive dissonance,” Mr. Vaughan said. “I always thought of mantises as wonderful things to have in your garden to get rid of bugs, but it turns out they sometimes go for larger prey, too.”

“It gave me new respect for mantises,” he added.

Image

Image

Mr. Vaughan’s sentiment is echoed by a cadre of researchers who place mantises in a class of their own among the swarming Class Insecta, and who are discovering a range of skills and predilections that make mantises act like aspiring vertebrates.

Praying mantises are the only insects able to swivel their heads and stare at you. Those piercing eyes are much like yours, equipped with 3-D vision and a fovea — a centralized concentration of light receptors — the better to focus and track.

A mantis can jump as unerringly as a cat, controlling its trajectory through an intricate series of twists and turns distributed across its legs and body, all to ensure a flawless landing on a ridiculously iffy target nearly every time.

The mantis appetite likewise turns out to leap and bound, and with scant regard for food-chain decorum.

By the standard alimentary sequence, insects feed on plants or one another, and then birds hunt down insects. But just as there are carnivorous plants like the Venus flytrap, mantises prey on hummingbirds and other small-to-middling birds more often than most people realize.

James V. Remsen of the Museum of Natural Science at Louisiana State University and his colleagues documented 147 cases of mantis-on-bird predation in 13 countries representing all continents but Antarctica — not surprising, Dr. Remsen said in an interview, since there are no mantises on Antarctica.

Hummingbirds were the most common target, but mantises also went after warblers, sunbirds, honeyeaters, flycatchers, vireos and European robins. Large species like the Chinese mantis, which grows to four inches in length, were the most avid avivores, and females were responsible for virtually all the bird-killing observed worldwide.

In two reported cases, females feasted on birds while copulating with males. Sometimes the mantises would tuck in through the bird’s breastbone, but more often they went for the head, Dr. Remsen said.

“They bite in and eat the brains,” he said, “which might imply this is something they’re professionals at.”

Some mantises in North America now seem to view hummingbird feeders as happy hunting grounds. Kris Okamoto, a retired nurse in San Juan Capistrano, Calif., recently came running when the young son of her house painter cried out that a praying mantis had snatched a hummingbird from her feeder.

Seeing that the bird was already dead, its skull pierced, Ms. Okamoto and the boy settled down and watched the mantis eat its fill of bird brain. When the postprandial mantis crept back up the feeder, Ms. Okamoto gently pushed it off with a stick. Not good enough.

“It started crawling back toward the feeder,” she said. “So we took it away completely and put it over the fence.”

Researchers emphasize that bird predation by mantises remains rare and is insignificant compared to the carnage linked to, say, free-roaming cats. Nevertheless, that the insects have learned to seek out bird feeders for a meal signifies “another step in cognition,” Dr. Remsen said. “We’re lucky praying mantises aren’t our size.”

A ‘Certain Personality’

Hunting is a professional trademark of the mantid order: the 2,500 known species are all predators, usually of insects and other small invertebrates. Some mantises chase down their prey, but many are consummate ambush artists, waiting with Zen stillness in the grass or among flowers for the right moment to strike.

Their closest relatives are the cockroaches, from which they diverged about 250 million years ago, said Gavin J. Svenson, curator of invertebrate zoology at the Cleveland Museum of Natural History and a leading authority on praying mantises. The family resemblance can still be seen in the long, slender antennae and the triangular, movie-alien shape of the head, among other features.

But praying mantises rise above the flattened scuttling posture that makes cockroaches look so … verminy. Praying mantises “are unusually charismatic,” said William D. Brown, who studies them at the State University of New York at Fredonia. Those large eyes, the way they turn to look at you, gives them a “certain personality” that most insects lack, he added.

Molecular and evolutionary studies suggest that mantises diversified in parallel with angiosperms — not because they had anything to do with flowering plants directly, but in part to more effectively prey on the insects that ate or pollinated the plants. Some mantises evolved to look like showy blossoms, a cancan of deadly come-ons.

Those show-offs don’t like playing wallflower. The orchid mantises of Asia, for example, generally avoid lingering around the flowers they imitate, and instead seek out patches of green vegetation. “They themselves become the flower,” Dr. Svenson said. “They’re a conspicuous beacon for pollinating insects.”

The bigger the floral pollinators, the bulkier grew their predatory mantises, the better to catch, control and consume even well-armed bumblebees and wasps.

Other mantises resemble gnarled twigs, scraps of tree bark or decomposing leaves, blending in beautifully with forest underbrush, tree trunk or canopy, a cryptic approach to fool would-be prey and their own predators alike. The smallest mantises flit around in the leaf litter of Australia and are “no bigger than your pinkie nail,” Dr. Svenson said. Yet the stick-mimicking mantises of Africa can be nearly as long as your forearm.

Mantises find their prey visually, and their exceptionally sophisticated eyesight has lately caught the attention of researchers. Jenny Read of the Institute of Neuroscience at Newcastle University in Britain and her colleagues recently demonstrated that praying mantises have stereoptic, or 3-D, vision, the first definitive evidence for the talent shown in an invertebrate.

By seeing in stereo — that is, mentally triangulating the slightly different images received from two eyes into a single line of sight — an animal can get a sense of depth and distance.

“It’s a complex ability, and we’re still trying to understand the algorithms, the calculations, that our own brains use to do it,” Dr. Read said.

Yet calculate the mantis clearly does. In experiments that traded charisma for cute, the researchers outfitted praying mantises with tiny homemade 3-D glasses: filters that effectively separated the two images a mantis would see when it looked at a screen.

A mantis will ignore a glowing box on a flat screen when viewing it without the benefit of 3-D glasses, the researchers found. But once the filters were in place, the mantis’s brain was fooled into the illusion of a three-dimensional object hovering at just the right “catch range,” an inch away, and began striking out into empty space as though at potential prey.

Our brain is five orders of magnitude bigger than theirs,” Dr. Read said. “So either our visual cortex is doing incredibly impressive things I don’t know about yet, or we could get rid of most of it and replace it with a praying mantis brain.”

Which, if it belonged to a female mantis, would surely cry, Must eat. Behind the female’s bottomless appetite is the extraordinary size of her egg case, or ootheca, a frothy proteinous mass studded with up to 400 eggs that can amount to half her body weight.

The female secretes the bulging capsule onto a twig or other surface, where it hardens and protects the eggs as they develop. The job is so energy-intensive she can rarely manage an encore.

The difficulty of securing enough calories to fabricate an ootheca may help explain why females of some mantid species famously engage in sexual cannibalism — consuming their mates after, or even during, copulation. Whether a male mantis actively sacrifices himself for the sake of his progeny or simply fails to dart away from the female in time remains a topic of active research.

Dr. Brown, of SUNY-Fredonia, and Katherine L. Barry of Macquarie University in Australia showed that cannibalized males sired about 60 more eggs than did non-cannibalized fathers, an increase of 20 percent over the standard ootheca complement of 258 eggs.

The conclusion: If a male, after spending 3.5 hours in the typical mantis copulatory bout, has a better than one in five chance of encountering a second fertile female somewhere down the line, reproductive logic dictates that he should channel his inner Olympian and bolt.

Or jump — mantises are good at that. In another movie-themed set of experiments, Malcolm Burrows of Cambridge University and his co-workers showed that when they held a pencil vertically in front of a praying mantis at just the right distance, which varied depending on the size of the mantis, the insect couldn’t help itself: it would jump onto the pencil.

“You could see it scanning with its head, weighing how far away the target was and at what orientation, and then it would jump and land successfully,” Dr. Burrows said. “We thought, how on earth could it maneuver its body from a horizontal surface and onto a vertical one and do it so accurately every time?”

To deconstruct the movements, the researchers took high-speed videos of jumping mantises. They determined that the mantis curved its jointed abdomen up, rotated its front legs counterclockwise and its rear legs clockwise, and switched front and rear rotations once and then back again — all within 70-thousandths of a second.

The midriff bending was key. When the researchers glued the abdomen to prevent it from bending, “the mantis would crash headfirst into its target,” Dr. Burrows said.

Somewhere, a hummingbird is laughing.
I’m not myself today, maybe I’m you
lsthompson711@yahoo.com

Sandy Clark
Posts: 269
Joined: Tue Oct 25, 2016 1:38 am
Location: Saskatoon, Sk. Canada
Has thanked: 1610 times
Been thanked: 584 times

Re: Beware: The Praying Mantis Wants Your Brain

Postby Sandy Clark » Mon Oct 02, 2017 2:54 am

Gory but interesting info about the Preying Mantis and certainly leaves me wondering about the Entity called a Mantis!!

User avatar
nuages
Posts: 8
Joined: Wed Dec 06, 2017 5:21 pm
Location: NE Wisconsin
Has thanked: 24 times
Been thanked: 20 times

Re: Beware: The Praying Mantis Wants Your Brain

Postby nuages » Fri Dec 08, 2017 12:04 pm

I had no idea they preyed on birds! The first time I saw one as a kid, it was on a bush. As I walked around the bush to check it out, it was checking me out as well, by turning it's head and following me with it's eyes. I remember thinking it looked like an alien. It was creepily fascinating. Thanks for the interesting article!
"Make of Yourself a Light"
~Unknown

User avatar
Spiritwind
Posts: 1050
Joined: Fri Feb 20, 2015 4:24 pm
Location: Inland NW, U.S.
Has thanked: 2183 times
Been thanked: 2468 times
Contact:

Re: Beware: The Praying Mantis Wants Your Brain

Postby Spiritwind » Fri Dec 08, 2017 3:44 pm

nuages wrote:I had no idea they preyed on birds! The first time I saw one as a kid, it was on a bush. As I walked around the bush to check it out, it was checking me out as well, by turning it's head and following me with it's eyes. I remember thinking it looked like an alien. It was creepily fascinating. Thanks for the interesting article!


I used to find them fascinating myself. About ten years ago I was walking from my car to go into the grocery store and found one right in the middle of the parking lot where cars drive in. So I picked it up to move it to a safer place and it bit me. It didn't break the skin, but it did hurt. I remember thinking, wow, thanks a lot for biting the hand that rescues. Since then I have also found them to be quite creepy, for a whole bunch of other reasons. I know they can be deceptively beautiful, but especially in light of what I posted above, I will never see them quite the same, and not sure I would rescue one again.
I’m not myself today, maybe I’m you
lsthompson711@yahoo.com

User avatar
LostNFound
Posts: 830
Joined: Thu Jun 01, 2017 1:08 pm
Location: Mountains of SW
Has thanked: 1762 times
Been thanked: 887 times

Re: Beware: The Praying Mantis Wants Your Brain

Postby LostNFound » Fri Dec 08, 2017 9:08 pm

I knew these creepy things could bite and I also have caught them watching me. I chase them off, they can go and eat ant brains but I won't let them hang around where the humming birds feed. I have to clear my mind of the picture or I have whacked out dreams, Remember the cartoon Space Ghost Coast to Coast. Had a creepy character that was a Mantis. Okay enough of that.

User avatar
nuages
Posts: 8
Joined: Wed Dec 06, 2017 5:21 pm
Location: NE Wisconsin
Has thanked: 24 times
Been thanked: 20 times

Re: Beware: The Praying Mantis Wants Your Brain

Postby nuages » Sat Dec 09, 2017 4:42 am

Totally hear that....freaky as all f*ck!
"Make of Yourself a Light"
~Unknown

User avatar
Phil
Posts: 476
Joined: Tue Jul 28, 2015 5:40 pm
Has thanked: 1 time
Been thanked: 859 times

Re: Beware: The Praying Mantis Wants Your Brain

Postby Phil » Sun Dec 10, 2017 12:19 am

When I was real young (the eighties), I was taught (not sure who, I think my parents) to fear killing them...was told they were on endangered (maybe it was “protected”??) list, with a huge fine for killing one. I remember being scared of being blamed when I found a dead one. I lived in the states: Delaware (east coast)

I remember not so long ago (Simon Parkes’ 15 minutes) researching trying to find information about that and wasn’t able to

The Space Ghost mantis was called Zorak
What is the purpose of your presence?

User avatar
Spiritwind
Posts: 1050
Joined: Fri Feb 20, 2015 4:24 pm
Location: Inland NW, U.S.
Has thanked: 2183 times
Been thanked: 2468 times
Contact:

Re: Beware: The Praying Mantis Wants Your Brain

Postby Spiritwind » Sun Dec 10, 2017 10:04 pm

Funny you should mention Simon Parkes, Phil. A lot happened during that saga on Avalon that still doesn't ever get talked about. I tried writing about it on TOT and my posts got disappeared. In fact, that whole experience was immensely valuable from a personal learning point of view. It's a great part of what has brought me to where I am now. Not sure about some weird memories that have surfaced, but those "memories" do play a rather large part in my attitude toward mantis beings in general now, regardless of their true origin. Deception is the word that comes to mind. Even in the biological form of mantis we encounter today in many parts of the world, they don't pray, they prey, and they do it very deceptively (like disguising themselves as a beautiful flower). That's all I going to say about that. Learning to go beyond surface appearances is a skill that continues to bear fruit, if you want to see past all the deception. I think quite a few of us have come a long ways there.
I’m not myself today, maybe I’m you
lsthompson711@yahoo.com

User avatar
Fred Steeves
Posts: 210
Joined: Sat Jun 10, 2017 8:54 pm
Location: East Tennessee USA
Has thanked: 627 times
Been thanked: 490 times
Contact:

Re: Beware: The Praying Mantis Wants Your Brain

Postby Fred Steeves » Sun Dec 10, 2017 11:51 pm

Spiritwind wrote:Funny you should mention Simon Parkes, Phil. A lot happened during that saga on Avalon that still doesn't ever get talked about. I tried writing about it on TOT and my posts got disappeared.


Huh, I don't think that would happen under the current Admin.
The unexamined life is not worth living.

Socrates

User avatar
Christine
Site Admin
Posts: 2062
Joined: Thu Feb 19, 2015 10:29 pm
Has thanked: 4091 times
Been thanked: 4300 times
Contact:

Re: Beware: The Praying Mantis Wants Your Brain

Postby Christine » Mon Dec 11, 2017 12:34 am

Fred Steeves wrote:
Spiritwind wrote:Funny you should mention Simon Parkes, Phil. A lot happened during that saga on Avalon that still doesn't ever get talked about. I tried writing about it on TOT and my posts got disappeared.


Huh, I don't think that would happen under the current Admin.


Such a saga the whole Simon Parkes affair it seems like another lifetime yet what we all experienced is still a learning.

Yes, a lot never got shared. Perhaps we are now better prepared to talk about it with some wisdom garnered, matter of fact that is how Spiritwind and I connected and for that I am ever grateful.
Image
The price of freedom is eternal vigilance.


Return to “The HFW (Holy F*ck Wow) - WTF forum”

Who is online

Users browsing this forum: No registered users and 1 guest

cron