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[[quoteright:300:[[WesternAnimation/XiaolinShowdown http://static.tvtropes.org/pmwiki/pub/images/Spider_7B_9090.jpg]]]]
[[caption-width-right:300:When ChewingTheScenery [[{{Pun}} goes too far]].]]
[[noreallife]]

->"''...a kind of giant space-going shark, a moving appetite, a vast, fast, terrible eating-machine which saw its purpose to be turning everything edible in the universe into shark shit.''"
-->-- '''SpiderRobinson''', ''[[Literature/CallahansCrosstimeSaloon Callahan's Secret]]''

The alien horde approaches. They don't necessarily enjoy giving us a FaceFullOfAlienWingWong, or be TheVirus and transform us, or what all... they're simply driven into adding biomass by whatever means necessary and as fast as possible.

Because the only purpose they have in life, the be-all and end-all of their existence, is their insatiable hunger, the conversion of all organic matter in the universe into more of them. They don't do diplomacy, because you don't bargain with lunch. This is, of course, always cause for a BugWar.

Most Locust Hordes use, or ''are'', OrganicTechnology. However, {{Nanomachines}} can also become a Horde -- the (in)famous "GreyGoo" scenario.

Compare ToServeMan and the slightly less extreme (as in, they ''are'' intelligent and only want inorganic resources) PlanetLooters, and do not directly confuse them with InsectoidAliens and HiveMind, who may or may not be this trope. HordeOfAlienLocusts is a common way to set up a GuiltFreeExterminationWar or CreatureHunterOrganization, since it's a fight between a group that wants to eat everything and the groups that don't want to be eaten. Not necessarily related to GiantSpaceFleaFromNowhere. Related to TheSwarm and PlanetaryParasite.

The trope is based, of course, on real-life locusts, which can totally destroy vast areas as they madly consume whatever they can before starving back to a sustainable population size. However, locusts are not actually an example, as the trope involves forces, species, or technology acting in an exaggerated parallel of real-life locust behavior.

----
!!Examples:

[[foldercontrol]]

[[folder:Anime & Manga]]
* The Vajra from ''MacrossFrontier'' are space-adapted monster bugs that attack without explanation. It ultimately turns out [[spoiler: they're not out to destroy the Frontier fleet, but rather on a misunderstood rescue mission since they see Ranka as one of their own because she can communicate via fold waves through her singing. The whole image of a HordeOfAlienLocusts was conjured by the conspirators from the Frontier and Galaxy fleets to hide their true goals, to take over the Vajra [[SubspaceAnsible fold communication]] network and use it to control the galaxy]].
* ''{{Vandread}}'' has this for the Human Race of Earth, who kill entire planets of people that have colonized elsewhere so they can harvest them for their organs.
[[/folder]]

[[folder:Audio Adaptations]]
* [[Series/DoctorWho The Doctor]] describes the Old Ones as being this in the Creator/BigFinish audio drama ''[[Recap/BigFinishDoctorWho059TheRoofOfTheWorld The Roof of the World]]''.
[[/folder]]

[[folder:Comicbooks]]
* The Org of Plasm featured in JimShooter's short-lived DefiantComics title ''[[WarriorsOfPlasm Warriors of PLASM]]'' (italics and caps in the original) was a world-sized organism that had to feed to remain healthy. Its natives, the Plasmoids, used organic spacefleets to conquer other worlds and mulch their ecosystems into "gore for the Org."
* An issue of ''MsMarvel'' features her fighting a dimension-hopping sorcerer. He intends to maroon her on an alternate Earth where a HordeOfAlienLocusts descends upon the planet (in about five minutes...) and picks it clean in ''minutes''.
* The UltimateMarvel version of Galactus combines this trope with PlanetEater.
* MarvelZombies turns the ''protagonists'' into this.
* In [[MichaelMoorcock ''Michael Moorcock's Multiverse'']], the antagonist served by the the forces of Law is the Original Insect - a creature which consumes entire planes of reality in order to process them into Singularity.
* The ComicStrip/DanDare story 'The Red Moon Mystery' featured "space bees" that would strip planets of organic life.
* The ''SpaceGhost'' comic miniseries has Zorak as the leader of a planet-ravaging horde of man-sized alien mantises.
* What the Comicbook/{{Annihilation}} Wave is made of.
[[/folder]]

[[folder:Fan Fiction]]
* A fanfiction example in Brian Randall's [[http://florestica.com/brandall/poe/index.htm Process of Elimination]].
* ''FanFic/{{Hands}}'': As noted below in Western Animation, [[WesternAnimation/MyLittlePonyFriendshipIsMagic the Changelings]] already give off this vibe. This story takes it further by actually making them aliens, who go from world to world, feeding on the emotions of whatever species they find. [[spoiler: Prior to Equestria, they tried to invade Earth. [[HumansAreWarriors Humanity fought back, and destroyed their Hive]].]]
[[/folder]]

[[folder:Films -- Animated]]
* The Cy-Bugs in ''Disney/WreckItRalph'', which are capable of assimilating objects they eat, for example, turning into a gun when consuming a gun. And they are not only programmed to fill this role in their home game, but they do it if given the opportunity to jump games as well.
[[/folder]]

[[folder:Films -- Live-Action]]
* The Dogora in the Japanese ''kaiju'' film ''Film/{{Dogora}}''.
* The creatures in ''Film/BattleLosAngeles'' are apparently after Earth's water; they set up massive machines to drain the ocean and seem to be powering their devices, and even their own bodies, with it.
* The swarm of metal locusts which Gort transforms into halfway through TheRemake of ''Film/TheDayTheEarthStoodStill2008''.
* The flying Bioraptors of 1999's ''Film/PitchBlack'' have apparently driven all life on the rest of the planet to extinction, to the point that they start killing off and eating each other en masse by the end.
* The invading aliens in ''Film/IndependenceDay'' were either these or PlanetLooters.
** Given that President Whitmore was temporarily telepathically linked with the aliens, I'd take his word for it:
---> "They're like locusts. They travel from planet to planet, their whole civilization. After they've consumed every natural resource they move on. And we're next."
* The Boglodites in ''Film/MenInBlack 3''.
[[/folder]]

[[folder:Literature]]
* Moties in ''Literature/TheMoteInGodsEye'' are {{Explosive Breeder}}s and technologically advanced enough to strip their entire solar system of resources thousands of years before the Empire of Man made FirstContact. After finding out that they have to breed or they die and are very warlike the Empire decided the only option was to interdict their home system.
* Creator/JohnRingo seems to like this trope a lot, using it for:
** The Dreen from ''Literature/IntoTheLookingGlass'', unsurprising since they are essentially the Zerg of Starcraft fame. Planets that they have completely denatured are even shown in setting.
** The Posleen from ''Literature/LegacyOfTheAldenata'' don't convert all biomass into more Posleen, but they do eat other sentient beings (including other Posleen) as they move from world to world, in an endless cycle of invasion, industrialization, overpopulation, nuclear holocaust.
** The Probes from ''Von Neumann's War'', cowritten with Creator/TravisSTaylor, and based on the self-replicating machines known as Universal Assemblers... theorized by Hungarian American mathematician and physicist John von Neumann.
* The Swarm Mother from the ''Literature/WildCards'' shared-world anthologies
* The Chtorran ecosystem from David Gerrold's ''Literature/TheWarAgainstTheChtorr''
* The Black Mass from the ''StarTrekNewFrontier'' book series
* The Arachnid Omnivoracity from ''TabletopGame/{{Starfire}}''. Tabletop game and series of books co-written by Creator/DavidWeber.
* The Klikiss from ''Literature/TheSagaOfSevenSuns''.
* Creator/AnneMcCaffrey
** The Hivers from the [[Literature/TowerAndTheHive Talents]] series.
** The Khleevi from her Literature/AcornaSeries.
** Thread from Literature/DragonridersOfPern.
* Greenfly, in Creator/AlastairReynolds's ''Literature/RevelationSpace'' 'verse, fall under the green goo variety. They enter a solar system, and quickly begin to break up ''all'' the mass outside of the star to turn into vegetation-filled habitats. A star overtaken by Greenfly will appear ''green'' due to the tens of billions of habitats orbiting it.
* The Primes from PeterFHamilton's ''Literature/CommonwealthSaga''.
* As one might guess from the page quote, ''Literature/CallahansCrosstimeSaloon'' features an alien race nicknamed the Cockroaches who embody this.
* The Vermicious Knids in ''Literature/CharlieAndTheGreatGlassElevator'' are said by Willy Wonka to have caused the extinction of life on the Moon, Venus, Mars and many other planets. They are unable, however, to survive the friction caused by entering Earth's atmosphere.
* The Slaver Sunflowers, from Creator/LarryNiven's ''Literature/KnownSpace'', are a vegetable version. They exist to turn all other life into fertilizer for themselves.
* The Unclean from the ''Franchise/StarTrek'' series "Invasion!". They need three things: warp cores, for energy; new DNA, to re-engineer themselves into useful forms; and BRAAAINS, for intelligence. ([[FridgeLogic Why can't they just grow their own?]])
* The Vord of ''Literature/CodexAlera'' are a CaptainErsatz of the [[StarCraft Zerg]] in a lot of ways, including following this trope. Their HiveMind is actually highly intelligent, but its attitude towards other lifeforms can easily be summed up as "assimilate or eat".
* The Grik of taylor Anderson's ''Literature/{{Destroyermen}}'' series are a modified version of this. First, they're reptilian, not insectoid. Second they're divided into two castes, the worker/soldier Uul who fit the locust swarm trope to a T and the aristocratic Hij who are the rulers and fairly intelligent and individualistic. As a whole they are no good at innovation, but are ''very'' good at reverse-engineering and copying.
* [[DiscussedTrope Discussed]] in ''Literature/{{Excession}}'' in the context of out-of-control self-replicating autonomous spacecraft, referred to as "Aggressive Hegemonising Swarm Objects". A common enough occurrence in the Literature/TheCulture for the galactic community to have set up various task-forces and organisations to prevent them becoming too big. However, it's more common for the Aggressive Hegemonising Swarm to be composed of self replicating machines, rather than living beings.
** It also says something about the nature of Culture society when Hegemonising Swarms / Space Locusts are a common "villain" in Culture children's stories.
* The ''TourOfTheMerrimack'' series has the ravenous, all-consuming Hive, who are among other things the only known species that can [[MirrorChemistry digest protein of either handedness]].
* The Forerunners in Andrey Livadny's ''Literature/TheHistoryOfTheGalaxy'' series were the first semi-biological creatures in the galaxy (possibly, the Universe). Composed of proto-matter encased in a magnetic bubble, they move in a giant swarm and consume all matter in their path, save for stars which are too hot. They reproduce by mitosis (i.e. division), and killing one usually results in the creation of several smaller ones. Like moths, they are guided by starlight but are smart enough to avoid getting too close. The Forerunners were responsible for wiping out three [[{{Precursors}} Precursor]] civilizations 3 million years ago, the descendants of only two of these still remain, mostly unaware of their former greatness. They were only stopped by the HeroicSacrifice of an entire race of FishPeople, who suicide-bombed ''[[EarthShatteringKaboom stars]]'' to burn the swarm until all their stars were gone, but all the Forerunners were dead as well. Even their natural enemies the [[SpaceWhale entriphages]] could not keep the Forerunners in line. When the humans later found several inert Forerunners, a CorruptCorporateExecutive decides to see if they can be useful and [[TooDumbToLive has them revived]]. They nearly wipe out two battle fleets before being destroyed for good.
** The Forerunners are discovered to be malfunctioning biological machines, whose original programming got corrupted by a solar flare, leaving only their most basic functions (e.g. feeding, reproduction, self-preservation). They were created by the first sentient being in the Universe, an EnergyBeing forming in the magnetic fields of a gas giant. The Forerunners' original purpose was to carry copies of the creature to other star systems and galaxies in order to ensure its survival. Over time, many died, and their remains ended up on habitable worlds, where their [=DNA=] [[{{Panspermia}} seeded life]] throughout the Universe. And yes, some people do indeed call the original creature {{God}}, even though the creation of biological life was a side-effect, and it doesn't care about us.
* The Ifrits of the ''Corean Chronicles'' are a slow-acting version of this, leaning toward PlanetLooters. They create bridges between their current world and a new one, which is terraformed and then populated with all forms of life. They produce beautiful civilizations and art. The catch? The entire time, they're ''feeding on the LifeEnergy of the world''. Within a few centuries or millennium, they can suck an entire world dry of its energy before moving on to the next one.
** They actually believe this is a service to the universe at large. By doing this, they allow the world to shine like a jewel for a brief time, rather than lingering dull and unimpressive for an eternity.
*** They might have started as Planet Looters, but they're slowly leaning more into the Locusts category now. Remember, it's clearly stated that after every world they colonize they devour more life energy more quickly. On the other hand this means they would have burned themselves out in another few hundred millennia if they hadn't been stopped in the books.
* The Nesk in ''Literature/{{Animorphs}}'' in ''In The Time of Dinosaurs''.
* The Swarm of Night of ''Literature/TheChathrandVoyages'' is what happens when this trope meets EldritchAbomination. An innumerable horde of tiny black insect-like spirits, its purpose is to patrol the borders of the underworld to prevent the dead from troubling the living. When released into the living world, however, it's drawn to massive killings (like mass battles) in progress, finishes them (by killing everyone there who's still alive) and drawing energy from that to increase its size. Once it reaches critical mass, it can eat a ''whole planet''. [[spoiler: The BigBad released it to do just that, since the destruction of a world was the test his GodOfEvil patrons demand of any mortal to be judged worthy of elevation to their number]].
* The demon locust horde from the Literature/LeftBehind book ''Apollyon'', whose resemblance matches those described in the book of Revelation, and whose main purpose is to go after those without the seal of God on their foreheads and infect them with a maddening delirium that lasts for five months.
* In ''Out of the Dust,'' a swarm of grasshoppers devour the crops on the protagonist's farm, including the apples on her mother's trees.
* The Ferrotophagous in Daniel Garro's ''El niño mariposa'' and ''Mi corazón de metal'' are big metalic insectoid iron-eaters that destroy civilizations.
[[/folder]]

[[folder:Live-Action TV]]
* ''Series/StargateSG1'' has the Replicators, which are ExactlyWhatItSaysOnTheTin: they consume technology and matter to make more of themselves. However, the Asurans of ''Series/StargateAtlantis'' start getting called by the same name. While they ''work'' exactly like the Replicators, their goal isn't "tear stuff up to make more."
* ''{{Lexx}}'' had Mantrid's drones, little helper robots that he ''deliberately'' turned into a locust horde after he became fused with a member of an alien race that wanted to destroy all humans. Lexx being [[CrapsackWorld what it is]], ''he succeeds'' in turning the overwhelming majority of the universe's matter into drones. [[spoiler: So many that he was HoistByHisOwnPetard: using ''almost all the universe's matter'' against the Lexx made gravity a problem and resulted in a Big Crunch (or "Big Collapse," as Kai called it.)]] After the Mantrid arc is over, the opening narration is removed because it calls the Lexx the most powerful weapon in the two universes - and ''there aren't two universes anymore.''
** ''{{Lexx}}'' also had the Lyekka aliens in the final season, a group of very hungry plants with a mother ship roughly twice the size of Earth's moon that would attach to a planet and strip it of all bio-matter to feed their insatiable hunger. This again being Lexx the aliens are only destroyed after eating a large number of worlds, killing billions and nearly eating the Earth (though it still blows up).
* ''Series/DoctorWho:''
** The Stingray creatures in the 2009 Easter Special "Planet of the Dead".
** The Rachnoss, a reborn-from-near-extinction species that the Doctor murders in their crib in "The Runaway Bride", mainly because there is no way to talk them out of their instinct to consume the Earth and other planets, at least not while they are still children.
* The Magog from ''Series/{{Andromeda}}''.
* ''Series/StarTrekTheNextGeneration'': "We are the Borg. Lower your shields and surrender your ships. We will add your biological and technological distinctiveness to our own. Your culture will adapt to service us. ResistanceIsFutile."
* An earthbound variant is the man-of-bugs from "What's My Line" on ''Series/BuffyTheVampireSlayer''.
* The alien bug in the Alien episode of ''Series/LostTapes'' escapes at the end of the episode. There dosen't really seem to be too much of a problem seeing as there's only one... until the narrator notes that [[OhCrap some bugs can reproduce asexually]].
* ''Series/StarTrekTheOriginalSeries'' has the Tribbles, cute, fuzzy animals that are "born pregnant," multiplying exponentially until they consume all available food sources and space.
* An episode of ''Series/PowerRangersInSpace'' had one MonsterOfTheWeek that was like this (maybe not a pure example of the Trope, seeing as the swarm did the bidding of someone else, namely [[BigBad Astronema]]). In the plot of the episode, a female monster called Mamamite planted millions of her eggs around Angel Grove assuring Astronema they'd hatch into a swarm of creatures who acted like this; however, Astronema urged her to speed up the process, and she did her best with a drill-like device. The heroes were able to defeat ''her'' rather easily, but her spawn hatched nonetheless, resulting in a somewhat accurate version of this Trope, which could also [[WormThatWalks combine into a stronger male version of its mother]] that called itself Termitus. Eventually, it was defeated by the Megazord.
[[/folder]]

[[folder:Tabletop Games]]
* The Tyranid Hive Fleets of ''TabletopGame/{{Warhammer 40000}}'' have been encroaching on the 40k galaxy for centuries. If they take a world, they kill and devour every living thing (taking useful traits from the creatures to improve their hordes of bio-engineered monsters), eat the soil, drink the oceans and suck up the atmosphere. They also use TheVirus in the form of the [[Franchise/{{Alien}} Xenomorph]]-esque Genestealers to destabilize potential opposition. The 5th edition rulebook (p. 166) says that they have consumed ''a dozen galaxies'' prior to coming to the one we know and love, and their current campaign of destruction is merely the next course. Largely inspired by the Xenomorphs from Alien.
** And it's implied that the Tyranids are running from something -- but what could scare a Horde of Alien Locusts? If it is something that can scare the Tyranids, a race literally built around the concept of {{Determinator}} and [[ImplacableMan The Implacable Man]], with some of the bigger beasts reaching all the way up to [[TheJuggernaut Juggernaut]] status, God only knows what kind of potentially [[EldritchAbomination unholy creatures]] they are, and if/when they will arrive.
** ''RogueTrader'' also has the Rak'Gol, eight-limbed alien monsters who can take on Space Marines in melee, and come in huge hordes. They are among the most dangerous creatures found in the game.
* The Planet Eaters from ''{{Monsterpocalypse}}'', as their name implies. The Savage Swarm aren't aliens, but they are BigCreepyCrawlies with insatiable appeties.
* The RPG ''Nightbane'' had Shadow Mantis/Locust which rather unsurprisingly are exactly this, except they eat inorganic material as well and are mostly wiped out nowadays.
* 2nd Edition ''DungeonsAndDragons'' contains a good number of these such as:
** The Horde, which are an elemental (and LawfulEvil InUniverse, ironically) race of insects which vary in size and shape from horde to horde, with all members of a particular horde being identical (i.e., sometimes they will appear as 20 ft. tall golden mantids other times they may appear as foot-long black beetles). They attack and consume anything that is not from their particular horde, even ''other'' hordes.
** The Witchlight Marauders. A sequential bioweapon made by the Orcs during the Unhuman Wars with the intention of [[KillEmAll completely devastating entire Elven worlds]] via consumption and ultraviolence. After they kill every living thing on the planet they then turn on themselves.
*** For those interested, the cycles unfolds as such: The space marauders (1000' crocodilian heads with sails and tentacles) would launch primary marauders (200' ravenous slugs) at enemy worlds. The primaries would proceed to devour ''everything'' in their path and periodically eject 2-20 secondary marauders (20' tall vaguely humanoid monsters with metal teeth and claws) which were [[BerserkButton obsessed with killing anything elven]]. The secondaries, once full of hot fey meat, would then (you guessed it) birth 1-4 tertiary marauders (5' tall humanoid berserkers with swords for hands) just as hungry as their progenitors. Once the primaries got their fill of sylvan carnage they'd burrow deep into the ground and split into two new primaries to start the grisly cycle all over again.
** The [[AIIsACrapshoot Clockwork Horrors]], which are like the Witchlight Marauders except that they're tiny metal spiders with death rays and buzz saws.
* ''TabletopGame/WerewolfTheForsaken'' has the Srizaku, or Hungry Children, which are Locust Hosts. In simple terms, this makes them demonic locust swarms that devour anything organic, with a fondness for human flesh, and are capable of reducing entire cities to picked-clean bones lying scattered amidst ruins. Fortunately, they're extremely rare because they are, obviously, ''not'' very good at being subtle.
[[/folder]]

[[folder:Videogames]]
* ''Franchise/MassEffect'' this is (sort of) the Reapers' way of doing things, although they don't use natural resources, just sentient life forms.
* In the ''VideoGame/{{X}}-Universe'' games, the [[AIIsACrapshoot Xenon]] are the mechanical version: being rogue terraforming robots, their only purpose is to build more of themselves, and to "[[ColonyDrop terraform]]" everything in sight. They fit here from moonlighting as technological locusts as well. The Kha'ak, introduced in ''X2: The Threat'', plays this straight with an even more alien culture that no other race can decipher and consist of a bee-like society who are attracted to Nividium, killing anything that gets in their way.
* The [[AdaptiveAbility Zerg]] from ''VideoGame/StarCraft'' (based on the Tyranids among other things) have a fairly similar approach, including the [[CannibalismSuperpower assimilation of new species into the Zerg swarm based on their useful traits]] -- although they were [[BrainwashedAndCrazy forced into this]] through Xel'Naga modifications, after previously being a race of docile, harmless worms. Though they infest and consume the resources of planets, their goal under the [[TheChessmaster Overmind]] was actually [[spoiler: the achievement of physical purity by genetically assimilating the Protoss. The sequel gives more background information on the Overmind, which infested Sarah Kerrigan to eventually relinquish control of the Zerg swarm to her. This would thereby prevent an EldritchAbomination from using them as an army for universal genocide]].
* Smoke's ending in ''Franchise/MortalKombat Armageddon'' has him fusing with his fellow Cyberninjas Sektor and Cyrax and doing the Nanomachine version of this.
* The Flood from the ''Franchise/{{Halo}}'' series are somewhere between Alien Locusts and TheVirus.
** The Drones probably qualify as well. If what they did to the New Mombassa tunnel system is any indication, they could probably rival in the Flood in numbers and environmental damage if allowed to run rampant.
* The Frythans in ''SevenKingdoms'' even gain one of their primary resources, LifePoints, mostly by killing enemies, and it's required to breed more.
* The Vortex and Foe of ''VideoGame/EccoTheDolphin'', though with the Vortex it's more explicit.
* One of the dreams of Mantis from ''VideoGame/ConquestFrontierWars'' is to 'Mush terrans into a milky white paste and dance over the earth drunk on their liquefied corpses.'
* The Strogg from the ''VideoGame/{{Quake}}'' series. On a couple of occasions, you get to see the [[{{Squick}} inside of their factories.]]
* ''VideoGame/JakAndDaxter'' gave us the Metal Heads, who are a horde of alien locust/mammal/reptile things varying from small but rapid scorpion-things to colossal juggernauts that are [[MadeOfIron nearly impossible to kill]]. While it isn't absolutely clear what their long-term goals are (or, for that matter, even if they ''have'' long-term goals), their rapacious swarming over everything within areas not heavily shielded and devoid of a handy OneManArmy puts them squarely within this trope.
* Locusts and Silicoids from ''SwordOfTheStars'' each embody this in a different way. Silicoids, also known as 'Swarms' are scilicon-based space-bugs who live in asteroid-belt and are mainly pests - a Swarmer Hive will send out a Silicoid Queen every 10 turns, aimed at a nearby planet with an asteroid-field, and establish a new Hive there if it isn't killed on the way. That Hive will send out a new Queen 10 turns later, and so on. Attacking either a Hive or a Queen gets you a fight with a swarm of angry Drones, so you better hope you remembered to bring point-defense systems. The Locusts, meanwhile, are not actual bugs but robots, and as such consume inorganic material, but they otherwise follow the trope to a tee (they're not PlanetLooters because they're utterly mindless and attack in bug-like swarms). The Locust Hiveworld will move slowly and deliberately across the map, draining the resources out of every planet it comes across (rendering them functionally useless), and - once it has gathered enough resources in this way - it will spawn a second Hiveworld. Left to its own devices, the Hiveworlds will turn every last bit of resources in the galaxy into more of themselves. Most players would rather face the [[ThatsNoMoon Deathstar-like]] [[NamesToRunAwayFromReallyFast System Killer]] than the Locusts...
** The Von Neummans are an intelligent example: while they are certainly resource-hungry robots, they react to someone blasting them apart by sending an [[CoolShip ultra-cool looking]] "Berserker" to eradicate the colony (presumably so that they can mop up the pieces later), and if ''that'' fails, they send a [[WeaponOfMassDestruction Construct]], because at that point, the potential resources from the [[EarthShatteringKaboom soon-to-be annihilated]] planet just isn't worth the threat of the base on it. They even create their own homeworld in some games.
* The Eaters from ''ChimeraBeast'' are mindless aliens that eat everything organic to grow stronger, starting from their own planet. This time, though, [[VillainProtagonist you play as one of the Locusts]].
* The aparoids from ''VideoGame/StarFoxAssault'' qualify due to the fact that when you fight the queen at the end, she insists that the entire universe and everything in it would be consumed by them.
* The Mycons of ''VideoGame/StarControl'' certainly qualify for this trope. Though they are a bit slower than other examples of this trope, they see it as their long-term goal to [[ScaryDogmaticAliens convert all "Non" to "Juffo-Wup".]] They turn out to be [[spoiler: a terraforming biotech whose programming has drifted from its original purpose over thousands of years. Nice job breaking it, Precursors.]] Also the robotic Slylandro Probes, which are a more urgent problem, [[spoiler:and are also the result of faulty programming]].
* ''VideoGame/WorldOfWarcraft'' has the Qiraji, insectoid monsters under the control of [[EldritchAbomination C'thun]]. While they don't come from space, they were sealed away from the rest of the world for millenia, giving their sudden reappearance a similar effect.
* The titular ''{{Bio Metal}}s'' are said to be this in the game's intro.
* The [=DomZ=] from ''VideoGame/BeyondGoodAndEvil''.
* The [=BETAs=] from ''VisualNovel/MuvLuv''.
* The Horde in ''VideoGame/BattleRealms'', no one knows where they came from or what they are, other than they kill everything in their path, and leave nothing alive, not even trees.
* The Kreegan of VideoGame/MightAndMagic are in-between this and PlanetLooters: their leadership is intelligent, but the common ranks aren't, and the reason indicated by someone that was around for the beginning of the [[{{Precursor}} Ancient]]-Kreegan War for why the Kregans continually travel, land and then conquer is that they rapidly outstrip the resources of their newly conquered planet due to their breeding cycle and need to move on to one or more other planets.
* [[spoiler:The Aurum]] from ''VideoGame/KidIcarusUprising''. They are a race of robotic aliens that are apparently beckoned by conflict and travel from planet to planet and consume each one. When Palutena calls them bees, and [[spoiler: Viridi]] calls them parasites, [[spoiler: Hades]] flat out says the apt term would be [[DiscussedTrope "locusts."]]
* The Cravers of VideoGame/EndlessSpace are a playable example. As a species of biomechanical insects created as a LivingWeapon, their racial traits[[note]]bigger fleets, cheaper ships, rapid exploitation of newly-colonized worlds, etc[[/note]] encourage continuous expansion and {{Zerg Rush}}ing other empires in the early game. Their '[[ForeverWar Eternal War]]' trait [[EnemyToAllLivingThings renders any form of peace with other empires impossible]].
[[/folder]]

[[folder:Webcomics]]
* Aylee's species from ''SluggyFreelance'' - aliens with the ability to alter their form to adapt to different environments and to emulate beings around them - view it as their holy duty to consume all other life and destroy worlds to spread themselves across the universe. From a more naturalistic point of view, this is probably just a rationalisation they've come up with for their nature as macroscopic equivalents of bacteria that infect and kill entire planets.
* The Kvrk Chk from ''QuentynQuinnSpaceRanger''. They consider all sentient races as food, including themselves. With shells as tough as battleship hull, and enduring unimaginable hazards on their homeworld, the only thing that makes them listen is [[spoiler:the use of StarKilling WeaponsOfMassDestruction]]
[[/folder]]

[[folder:Western Animation]]
* The Parasprites in ''WesternAnimation/MyLittlePonyFriendshipIsMagic''. They start off eating every edible thing that they could get their teeth on, until Twilight casts a spell to [[ExactWords "make them stop eating all the food."]] [[NiceJobBreakingItHero Whereupon they start eating everything else instead]].
** The [[VoluntaryShapeshifting Changelings]] give off this particular vibe as well, what with their less-than-subtle similarities with to [[VideoGame/{{Starcraft}} Zerg]]. The only difference being that they [[EmotionEater feed on love]] instead of ponies themselves.
* In ''Franchise/{{Transformers}}'' we have the Insecticons, a literal swarm of alien locusts (and weevils and stag beetles). Unlike most Transformers, they don't live simply on energon. Instead they eat ''everything''--including, in the comics, meat.
* In the ''WesternAnimation/XiaolinShowdown'' episode "Dangerous Minds", Jack Spicer accidentally [[SealedEvilInACan releases]] a horde of GiantSpiders. According to the ancient legends, "The spiders are neither good nor evil. They are merely... ''consumers''. They consume vegetation, animals, buildings, even the earth itself. They eat... until there is nothing left to eat."
** There is also a Shen Gong Wu that releases a horde of stone locusts that luckily are solely herbivorous, but really quick at it. It was found in the episode in which the [[MonsterOfTheWeek once-appearing villain]] was a plant, not stoppable in any other way.
* In ''WesternAnimation/GodzillaTheSeries'', one episode shows a swarm of over-sized ants. Said ants almost destroyed an entire rainforest within a few days.
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* [[BlobMonster Hysteria]] from [[http://channel.nationalgeographic.com/channel/extraterrestrial/main.html Extraterrestrial]]. Actually, more of a aquatic-based ''fungus'' made up of individual cells that can combine to form a deadly, venomous goo-like form.
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