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Spider Discovered That Builds Its Own Spider Decoys

OakDragon writes "A newly discovered species of spider — apparently of the genus Cyclosa — has been discovered in the Peruvian Amazon. The spider builds an elaborate decoy out of web, twigs, and other scraps, which appears to be a much larger spider. The spider will even cause the decoy to move, marionette-style, by shaking the web."

75 of 119 comments (clear)

  1. or maybe by Torvac · · Score: 5, Interesting

    it builds a monument of its spider god ? our next overlord

    1. Re:or maybe by someone1234 · · Score: 1

      Maybe this is similar how the irratus bug started.

      --
      Patents Drive Free Software as Hurricanes Drive Construction Industry
    2. Re:or maybe by qbitslayer · · Score: 3, Insightful

      No. It's a monument to evolution because evolution designs everything even though it's not trying to design anything.

    3. Re:or maybe by TapeCutter · · Score: 2

      Spiders are master engineers, there's an Attenbourough clip somewhere of a spider that hoists empty snail shells up into a bush and ties it to a branch as a house. There's another kind that makes a sort of catapult out of silk to shoot down bugs. Some orb weavers put shock absorbers in the center of their webs. You can tell they don't "know" what they are doing because all members of the species build the same structures. I can understand people not wanting to touch them, I can't understand the sheer terror some people display at the sight of them.

      --
      And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    4. Re:or maybe by Anonymous Coward · · Score: 1

      I can't understand the sheer terror some people display at the sight of them.

      They're pretty much nature's perfect predator. All of what you've described above is done for the express purpose of killing. It tends to unsettle people. Couple that with the fact that there are many out there the size of a quarter that can kill or severely mess up a human, and you set off a lot of instinctual fear.

  2. It can count... by DSS11Q13 · · Score: 4, Insightful

    for some reason, the thing I'm marveling at the most is that it knows it has 8 legs. How?!

    Why not 6 or 7? ...because 7, 8, 9?

    1. Re:It can count... by flyingfsck · · Score: 5, Funny

      You thought that spiders are stupid, eh? They go to school, where they learn reeling and writhing...

      --
      Excuse me, but please get off my Pennisetum Clandestinum, eh!
    2. Re:It can count... by michelcolman · · Score: 5, Insightful

      That's just due to selection... by the photographer. There's another picture further down in the article where the decoy only seems to have five legs. But of course the one that looks most like a spider, with eight legs, was selected for the top of the article.

    3. Re:It can count... by Volguus+Zildrohar · · Score: 5, Funny

      Of course the spider can't count. It's just that the spiders who made 6 and 7 legged decoys got eaten by the birds that could count.

      --
      When confronted with one problem, some think "I'll use recursion". Now they are confronted with one problem.
    4. Re:It can count... by SomePgmr · · Score: 4, Funny

      Spiders hate it when someone shows their unfinished work.

    5. Re:It can count... by jones_supa · · Score: 1

      for some reason, the thing I'm marveling at the most is that it knows it has 8 legs. How?!

      Why not 6 or 7? ...because 7, 8, 9?

      It could be that through its genetic factors the spider could "know" (in a very low, evolutionary level) how it looks like and thus what kind of thing to replicate.

    6. Re:It can count... by jones_supa · · Score: 1

      That's just due to selection... by the photographer. There's another picture further down in the article where the decoy only seems to have five legs. But of course the one that looks most like a spider, with eight legs, was selected for the top of the article.

      But maybe those are partial structures? There could be a limit of 8 in most cases.

    7. Re:It can count... by Jetra · · Score: 1

      Must be a DeviantArt user

    8. Re:It can count... by Forty+Two+Tenfold · · Score: 1

      Samantha Wright will know better, but I heard squid mops, or clusters of eggs are made of constant number thereof.

      --
      Upward mobility is a slippery slope - the higher you climb the more you show your ass.
    9. Re:It can count... by Provocateur · · Score: 1

      But the photographer had to show off his business card from Wired.com.

      --
      WARNING: Smartphones have side effects--most of them undocumented.
    10. Re:It can count... by Megane · · Score: 1

      Because if it put in 9 legs, it wouldn't have enough legs of its own to pull the strings, duh!

      --
      #naabhaprzrag, #sverubfr-000, #agi-fcbafberq, negvpyr[pynff*=' negvpyr-ary-'] { qvfcynl: abar !vzcbegnag; }
    11. Re:It can count... by IndustrialComplex · · Score: 1

      A few other posters identified some possible reasons (photographer's preference, etc)

      However, a creature (or person) doesn't need to understand a visual object to imitate it. I think it's pretty awesome that it looks so much like a spider, but as an example, someone doesn't need to know what a tree is to know that a Japanese Maple looks vastly different from a Blue Spruce if I see them side by side.

      So the spider could make a 5 legged decoy, and 'know' that it looks wrong.

      There is also the fact that spiders already do 'count' or at least recognize patterns, I mean, look at the webs they make. Symmetry and patterns are big for them.

      --
      Out of modpoints but really liked a post? 1BDkF6TtmmeZ3yqXbz9yhdYVqRYnwFoXDj
    12. Re:It can count... by Golddess · · Score: 1

      "Monkey not know this glucose thing that AC speak of. Monkey just know that monkey hungry, and banana make monkey not hungry." -A. Monkey

      Maybe it's something like that for the spider?

      --
      "I'm not sure I like the fugnutish tone you used in your post!" -RogL (608926)-
    13. Re:It can count... by ZZane · · Score: 1

      Wow, you deserve to spend some time at the punitentiary.

      --
      This sig is worse than my last.
  3. Creepy... by freeze128 · · Score: 1

    Kinda like the movie Mimic...

    1. Re:Creepy... by kale77in · · Score: 2

      Mimic was my all-time #1 bad-science movie, for one single, monumental plot hole. In order to develop, the mega-roaches needed selection pressures to favour those that resembled humans, but no humans or other predators were even aware of them, let alone selectively killing off the non-humanoid ones.

    2. Re:Creepy... by kkwst2 · · Score: 1

      It is not that necessarily that the weaker ones are killed off. But there has to be some advantage to breeding or survival for a mutation to increase in frequency in a population. Otherwise it just gets diluted out. It is possible that if a mutation isn't a disadvantage it could stick around as a lineage and then later thrive when some outside pressure gets put on the species such that it is now an advantage. So it may not need to happen right way, but it does at some point need to be an advantage for the whole species to evolve.

  4. as the saying goes now... by Anonymous Coward · · Score: 2, Funny

    Damn nature you scary!

  5. Gotta love by Nyder · · Score: 4, Insightful

    evolution.

    Not only did this spider decided it needed a bigger version of itself to scare off would be predators, it knew it had to make it move to look be really effective.

    I know people who aren't even this smart.

    --
    Be seeing you...
    1. Re:Gotta love by Anonymous Coward · · Score: 1

      Spiders that built something that looked like it had two legs survived over those who built one. Eventually those the spider that built eight in the right shape did better at surviving then all the others. It probably didn't happen exactly that way but along those lines.

    2. Re:Gotta love by michelcolman · · Score: 3, Interesting

      What I don't understand, though, is that a big spider hanging in a web is probably likely to scare off not only predators, but prey as well. What self-respecting insect is going to fly straight past a big spider? Surely evolution must have "taught" them by now that where a big spider is floating in mid-air, there's probably a web around it?

      And what about predators interested in eating big spiders?

      On the other hand, this construction may actually be quite effective in keeping big, clumsy animals like, say, humans, from destroying the web accidentally. Maybe that outweighs the visibility to prey.

    3. Re: Gotta love by Rational · · Score: 2

      The spider is obviously on DPS duty while the decoy tanks.

      --
      "Be nice, veer left, and never stop thinking" Iain Banks - Walking On Glass
    4. Re:Gotta love by amicusNYCL · · Score: 2

      You might assume too much about the abilities of flying insects. The bugs around my house can't seem to avoid hitting a wall or myself, much less a nearly invisible web.

      --
      "Our two-party system is like a bowl of shit looking at itself in a mirror." - Lewis Black
    5. Re:Gotta love by steelfood · · Score: 1

      Evolution is not the word you're looking for. The phrase you're looking for is natural selection.

      --
      "If a nation expects to be ignorant and free in a state of civilization, it expects what never was and never will be."
    6. Re: Gotta love by Brian+Feldman · · Score: 1

      I would say it's more like the decoy is a crowd-control summon.

      --
      Brian Fundakowski Feldman
  6. Holoduke by MrEricSir · · Score: 4, Funny

    Someone should check if the spiders were doing this before 1996, because I bet they stole the idea from Duke 3D.

    --
    There's no -1 for "I don't get it."
    1. Re:Holoduke by azalin · · Score: 2

      Nay, they reached their final form after countless years of tinkering. Oh well... They do have something in common with a certain Duke title.

    2. Re:Holoduke by Tarlus · · Score: 1

      ...as opposed to figuratively rehashing references?

      I wouldn't go so far as to call this context-free, as the Holoduke decoy was the first thing that came to mind for me as well. =)

      --
      /* No Comment */
    3. Re:Holoduke by Onymous+Coward · · Score: 1

      Unshared context failure is something you'll run into, too. Indeed, you're already running into it, but on the converse side of how one might usually think of it.

      What's the general solution? Always link to information about the context? And maybe the linked resource can give brief explanations and in turn link to related memes from other generations and cultures? A kind of inter-cultural / inter-generational meme translator?

    4. Re:Holoduke by Onymous+Coward · · Score: 1

      That seems a simplistic response, though, doesn't it? There's a lot of value to be gained in making reference to a similar subject, at least in that the referenced subject can serve as an example of how such things might tend to be. Also it serves to clarify, where a more abstract description might be hard for people to understand. I think I'm saying something constructive here, but it might be hard for you to grasp. Drawing parallels to something else could make it much easier for you to get. But, yeah, only so long as you know the reference.

      You seem upset. Maybe you find unfamiliar references hurtful in some way? Exclusive? Exclusion is in fact a bad drawback for failed references. It's divisive of communities, resulting in reduced sense of valuation for those in the outgroup.

      If it's any benefit to you, I don't devalue you because you're unfamiliar with Duke Nukem 3D. Heck, I'm an old fart and I never played it. Well, except multiplayer once at a friend's party. It was fun.

      Your rhetorical style opposes your own goals, I should point out. You might lead a more enjoyable life if you learn to manage your emotional outbursts and instead make your communication intentional. Serving your feelings by blatting them out may feel good in the short term, but don't be fooled into thinking it's how you ought to behave and that it will help you feel good in the long run.

    5. Re:Holoduke by Onymous+Coward · · Score: 1

      There may be an excess of references meaningful only to small ingroups. And that is certainly worthy of fighting against. (And I mean small ingroups inside the already small audience of geeks interested in cutting-edge stuff.)

      This particular situation may not be the best to rail against, however. The Duke Nukem 3D references turn out to be valuable within the target audience. (Target audience being all of us computer nerds.)

      Along with Wolfenstein 3D and Doom, Duke Nukem 3D is considered responsible for popularizing first-person shooters. It was released to major acclaim; reviewers praised the interactivity of the environment, level design, gameplay and unique risqué humor (a mix of pop-culture satire and lampooning of over-the-top Hollywood action heroes). Its lasting appeal and impact on modern video games has led to its being considered one of the most important video games of all time.

      Duke Nukem 3D is ... seminal.

      But, yes, otherwise I agree that references should be kept as meaningful and inclusive of the overall target audience, rather than degenerating into having ingroup-only usefulness, serving just the aging population or any such group (conceivably specific tech, younger age, specific game, etc.).

  7. Like a factory by Anonymous Coward · · Score: 1

    that makes miniature models of factories.

  8. NASA needs more funding by ikaruga · · Score: 1

    because I don't want to live in this planet anymore. We as a human race are losing the war against the evolving arachnids.

  9. That's fuckin' awesome! by hack++slash · · Score: 5, Funny

    I'm going to do the same to ward off other people.

    *builds giant man in garden out of wicker*

    --
    To do something right, you often have to roll up your sleeves and get busy.
    1. Re:That's fuckin' awesome! by Jesus_666 · · Score: 1

      If you fill it with bees it might ward off Nicolas Cage.

      --
      USE HOT GRITS WITH STATUE OF NATALIE PORTMAN (NAKED AND PETRIFIED)
    2. Re:That's fuckin' awesome! by Provocateur · · Score: 3, Funny

      "No, that's not our neighbor, that's got three legs."

      "He must be compensating."

      --
      WARNING: Smartphones have side effects--most of them undocumented.
    3. Re:That's fuckin' awesome! by Tarlus · · Score: 1

      I'm going to do the same to ward off other people.

      Especially if you build it with the wrong number of limbs.

      --
      /* No Comment */
    4. Re:That's fuckin' awesome! by steelfood · · Score: 1

      Not sure about warding off other people, but I hear it's a really effective method of scaring off crows.

      --
      "If a nation expects to be ignorant and free in a state of civilization, it expects what never was and never will be."
  10. Question i'd like to know the answer to.. by Anonymous Coward · · Score: 2, Interesting

    Is does the spider know that what it's built looks like it? This could have evolved to look like a spider from a predators perspective but the spider probably has no idea what its making.

  11. Re:First Animal Art? by oodaloop · · Score: 1

    If it serves a purpose, it's not art.

    --
    Tic-Tac-Toe, Global Thermonuclear War, and relationships all have the same winning move.
  12. Re:Question i'd like to know the answer to.. by Anonymous Coward · · Score: 1

    "know" is such a weird word really.

  13. What confuses me is... by Anonymous Coward · · Score: 1

    ...why we are discussing the spider instead of brainstorming ways to wipe them from existence. Seriously, a spider that builds fucking decoys? That exceeds the threshold for me being comfortable with it as a species. And before you scream "you're just prejudice against spiders!" I'll have you know that the day my friend's chow builds a life-size German Shepard in her living room I'll be the first one grabbing for a shotgun. It takes effort to stay on top of the pyramid of edible shit, we can't afford to get complacent.

  14. It's Obvious, really.... by Anonymous Coward · · Score: 1

    .... take off and nuke it from orbit, it's the only way to be sure.

  15. That Anansi, such a tricksy one! by mekkab · · Score: 3, Funny

    But what happens when that spider discovers tar, makes an ersatz spider out of it, drinks too much, and fights with it?

    --
    In the future, I would want to not be isolated from my friends in the Space Station.
  16. Re:First Animal Art? by craigminah · · Score: 1

    The definition of art that you're using was created by humans. If animals defined "art" it'd be totally different and human art wouldn't qualify. Same thing goes with defining intelligence (e.g. humans smart, tree stupid). For all we know, the spider's decoy may be art, an actual decoy, a "god", or a mating call, who knows? Applying human-centric beliefs kind of skews your judgement though.

  17. Re:Question i'd like to know the answer to.. by Taibhsear · · Score: 1

    I'm pretty sure the spider has seen other spiders before. Like it's mother and siblings and mates. Or looking in the reflection of water. I'm not knowledgeable enough in arachnid neurology to know the extent of mental awareness of spiders but I'm pretty sure it can make a pretty good guess at what it looks like.

    However, if you mean the spider is just putting sticks and debris there in the web out of instinct and puts no conscious effort into it, I may concede that point to you.

  18. Some Pig by Picass0 · · Score: 1

    Let me know when it writes "radiant" and I'll be impressed

  19. A scarecrow for other spiders? by na1led · · Score: 1

    So this fake spider might scare off other preys, but wouldn't it also scare off it's food?

    --
    -- By all means let's be open-minded, but not so open-minded that our brains drop out.
  20. Re:First Animal Art? by DragonWriter · · Score: 1

    The definition of art that you're using was created by humans. If animals defined "art" it'd be totally different and human art wouldn't qualify.

    This seems to be a complete non-sequitur, unless you're unstated argument is that questions of the form "is X an example of Y" should be answered on the basis of speculative alternative definitions of Y, rather than the actual definition of Y which is the basis of the question.

  21. Re:Job description by DragonWriter · · Score: 1

    When I thought that I already knew enough about the job of an arachnologist to stay away from it, I read this. If this also holds true for other insects

    Spiders aren't insects. They are arachnids (both insects and arachnids are arthropods.)

  22. Re:First Animal Art? by mcgrew · · Score: 1

    Then there is no such thing as art.

  23. Re:First Animal Art? by Tarlus · · Score: 1

    No more than a regular spider web is art.

    --
    /* No Comment */
  24. Re:First Animal Art? by craigminah · · Score: 1

    How is what I said illogical? If we use human-derived definitions they are inherently human-centric. I was replying to the AC who said "the definition of art" to the question posed in the post above his/her reply that asked "Says who?"

  25. Nigerian scam? by vgerclover · · Score: 1

    It might be the same reason that Nigerian scamers still say they are from Nigeria: Animals that are scared of big spiders stay away, while insects that ignore spiders get caught by the web.

  26. Re:First Animal Art? by HeckRuler · · Score: 1

    If animals defined "art" it'd be totally different

    You mean some animals other than humans.

  27. Re:Evolution? by reasterling · · Score: 1

    it encoded the knowledge into its genes.

    If it is a learned behaviour then it can not be "encoded ... into its genes". Some spider species care for their young. I do not know about this species in particular, but it is posible that the knowledge could be passed from one generation to the next through example. At any rate, this is either instinctual, a sign of generational (cultural) learning, or a demonstration of the intellect (reasoning skills) of these spiders. All the comments on this forum about how this is a sign of the wonders of evolution are simply wrong. It would be like saying that we are evolving everytime we create a new type of transportation.

    --
    "For I desired mercy, and not sacrifice" -- God
  28. Re:Question i'd like to know the answer to.. by Johann+Lau · · Score: 1

    While you may be right that this spider doesn't,

    Primates are the only animals that can recognize themselves in a mirror

    is way wrong.

    http://en.wikipedia.org/wiki/Mirror_test#Animal_Species_Capable_of_Passing

    Looking for that I also came across this sentence:

    Sadly, humans are the only animals that use mirrors for taking deceiving self-portraits to put on social networks

    Hah, this is now outdated information! Spiders are actually the *first* creature (we know of to date) to post decoys of themselves on the intrawebs, while humans are kinda late to the game.

  29. claim doesn't seem to follow to me by shadowofwind · · Score: 1

    How do they know that's a decoy? I've seen other spiders that put stuff in their web. I remember a big black and yellow spider in the garden when I was a kid that had something similar. I speculated that it was there to help prevent birds from flying into it and destroying the web. In this case, the spidery appearance of the junk in the web appears to follow from the fact that the junk has been stuck to the strands of the web, which radiate out from the center much like the legs of a spider.

    1. Re:claim doesn't seem to follow to me by shadowofwind · · Score: 1

      Though I suppose the decoy idea makes sense for avoiding being eaten by birds. In which case this isn't the only species of spider that does that, there is at least one more in North America.

  30. Re:First Animal Art? by DragonWriter · · Score: 1

    How is what I said illogical?

    It proposes, in its general form, that a question should be answered based on something other than what the words in the question mean, but based on how some other entities who are the subject of the question might define the words; this is aggravated by the fact that the entities in question in the specific framing are ones which we have no reason to believe (and plenty of reason not to believe) have the ability to process the kind of abstract ideas that would let them define any words in any case.

    Its as if I pointed to a green leaf on a tree and asked if it was blue, and someone responded with "Well, your definition of blue is human-centric. How would the tree define blue? Maybe the leaf is blue, and and maybe its red. We don't really know." Instead of "No, dude, the leaf is green."

  31. Off-topic and wrong all at once. by DragonWriter · · Score: 1

    If you're making $60k now, you're making less than someone making $30k in 1997.

    First, this is grossly off-topic.

    Second, its also grossly wrong. Adjusted for inflation, $30k in 1997 is equivalent to $43k in 2012. The latest year for which your "$60k now is less than $30k then" is true is 1987.

    1. Re:Off-topic and wrong all at once. by multicoregeneral · · Score: 1

      It's easy to be wrong, but I wasn't off topic.

      --
      This signature intentionally left blank.
    2. Re:Off-topic and wrong all at once. by mattack2 · · Score: 1

      When TFA is about decoy building spiders, talking about salaries is off-topic!

  32. Re:First Animal Art? by craigminah · · Score: 1

    I think we've gotten off track a bit. Someone previously asked, "Is this the first example of animal art?" A few replies went back and forth saying it wasn't art due to the definition of what "art" is. Humans don't think it's art but maybe it is art to the spiders. Kind of akin to you and I looking at a painting and us each taking opposing views of whether or not the painting were "art."

  33. a decoy to avoid by frd1963 · · Score: 1

    one or more of the following: - irate baby-mamas - process servers - loan sharks - Jehova's witnesses - the crack spider At least that's the impression that I get from watching this related video

  34. They got it wrong... by OS2toMAC · · Score: 1

    The decoy was built by the creatures in the next bush over. Three poison arrow frogs behind a blind, aiming at the spider coming up behind the decoy.

  35. Re:First Animal Art? by ZombieThoughts · · Score: 1

    Right, so we should wait for the spiders's judgement?

  36. Re:Evolution? by SupraTT+GOP · · Score: 1

    You should be careful asking such questions. Oh, AC! Nevermind then, carry on.

    On second thought.... I hope you are further anonymized.

  37. Herbivores by tannermorrow · · Score: 1

    So are these spiders herbivores? Because otherwise it would seem that having a giant spider decoy hanging in your web would be counter-productive for a carnivorous diet.

  38. Thanks a lot Slashdot! by DiEx-15 · · Score: 1

    Got the creepy crawlies now!