List of natural horror films

This is a list of eco-horror films. Eco-horror is a sub-genre of horror and disaster films which feature animals or insects (real or mutated), and sometimes plants, attacking humans. Films featuring viruses and legendary creatures are not included in this list.

Further information: List of giant monster films and List of disaster films

Amphibians

• Frog-g-g! (2004; giant frog)
• Frogs (1972; frogs)

Arachnids

• Arachnophobia (1990; spiders)
• The Black Scorpion (1950's giant scorpions, spider and worm creature.
• Earth vs. the Spider (1958; giant spider)
• Eight Legged Freaks (2002; giant spiders)
• The Giant Spider Invasion (1975; giant spiders)
• Have Rocket, Will Travel (1959; giant flame throwing tarantula)
• Horrors of Spider Island (1960; giant spiders)
• Ice Spiders (2007; giant spiders)
• Kingdom of the Spiders (1977; tarantulas)
• Mesa of Lost Women (1953; giant spiders)
• Tarantula (1955; giant tarantula)
• Webs (2003; spiders)

Birds

• The Birds (1963; flocks of vicious seagulls, crows, birds)
  • The Birds II: Land's End (1994)
• KAW (2007; Ravens)
  • Birdemic:Shock and Terror (2009; Eagles)

Fish, crustaceans, and mollusks

• Attack of the Crab Monsters (1957; abnormally large crabs)
• The Beast (1996; aggressive giant squid)
• Deep Rising (1998; ottoia - deep-sea worms)
• DeepStar Six (1989; reptilian crustacean)
• Frankenfish (2004; mutant snakehead)
• It Came from Beneath the Sea (1955; giant octopus)
• Leviathan (1989; various sea creatures)
• Piranha (1978; genetically enhanced piranhas)
  • Piranha II: The Spawning (1981; genetically altered piranhas
• Piranha (1995; mutant piranhas)
• Piranha 3D (2010; prehistoric piranhas)
• Tentacles (1977; abnormally large octopus)

Sharks

• Deep Blue Sea (1999; genetically engineered longfin mako sharks)
• Great White (1980; great white shark)
• Hammerhead: Shark Frenzy (2005; mutant hammerhead shark)/human hybrid
• Jaws films ( great white sharks)
• Open Water (film) (2003; great white sharks)
• Red Water (2003; bull shark)
• Shark Attack films (genetically enchanced great white shark)
• The Reef (film) (giant Great White shark).
• Tintorera (1977; tiger shark)

Insects

• Beginning of the End (1957; giant grasshoppers)
• Bug (1975; beetles)
• Caved In: Prehistoric Terror (2006; prehistoric rhinoceros beetles)
• Creepshow (1982; giant cockroaches)
• The Deadly Mantis (1957; giant praying mantis)
• The Fly 1958 films (mutant fly/human hybrid)
• The Fly 1986 films (mutant fly/human hybrid)
• Mansquito (2005; mutant mosquito/human hybrid)
• Mimic films (Judas Breed, giant humanoid insects)
• Monster from Green Hell (1958; giant wasps)
• Mosquito (1995; mosquitos)
• Phenomena (1985; multiple insects)
• Insecticidal (2005; various insects)
• The Thaw (2009; Prehistoric parasites)

Ants

• Indiana Jones and the Kingdom of the Crystal Skull (2008); army ants.
• Empire of the Ants (1977; giant ants)
• It Happened at Lakewood Manor (1977)
• The Naked Jungle (1954)
• Phase IV (1974; intelligent ants)
• Them! (1954; giant ants)
• The Bone Snatcher (2003; intelligent ants)

Bees

• The Deadly Bees (1966)
• The Swarm (1978; killer bees)

Mammals

• Attack of the Sabretooth (2005; cloned sabretooth tiger)
• Bats (1999; genetically altered bats)
• The Edge (1997; bear)
• The Ghost and the Darkness (1996; lion)
• Grizzly (1976; prehistoric grizzly bear)
• Grizzly Park (2008; grizzly bear)
• The Killer Shrews (1959; giant shrews)
• Night of the Lepus (1972; giant man-eating rabbits)
• Nightwing (1979; vampire bats)
• Orca (1977; highly aggressive orca whale)
• Pet Sematary (1989; undead cat)
• Razorback (1984; giant wild hog)
• Sabretooth (2002; genetically created sabretooth tiger)

Dogs

• The Breed (2006; mutated dogs)
• Cujo (1983; St. Bernard)
• Devil Dog: The Hound of Hell (1978; demonic rottweilers)
• Dogs of Hell (1982; rottweiler dogs)
• The Pack (1977; mutant dogs)
• Frozen (2010; wolves)
• Rottweiler (2004; genetically altered rottweiler)
• Man's Best Friend (1993; genetically altered Tibetan Mastiff)

Primates

• Congo (1995; gray gorillas)
• King Kong films (abnormally large gorilla)
• Link (1986; super-intelligent orangutan)
• Monkey Shines (1988; monkey)
• BloodMonkey (2007; man-eating monkey)

Rats

• Altered Species (2001; giant rat)
• The Food of the Gods (1976; giant rats)
  • Food of the Gods II (1989)
• The Rats (2002)
• Willard (1971)
  • Ben (1972)
• Willard (2003)

Reptiles

• The Giant Gila Monster (1959; giant gila monster)
• Godzilla films (giant mutated dinosaur)
• Jurassic Park films (genetically engineered dinosaurs)
  • Gorgo (1961; abnormally large bipedal aquatic dinosaur)
• Komodo (1999; genetically engineered komodo dragons)
• Komodo vs. Cobra (2004; genetically engineered komodo dragons and king cobras)

Crocodilians

• Crocodile(2000; giant Nile crocodile)
  • Crocodile 2: Death Swamp (2002; giant Saltwater crocodile)
• Lake Placid (1999; abnormally large 2 saltwater crocodiles)
  • Lake Placid 2 (2007)
  • Lake Placid 3 (2010)
• Rogue (2007)
• Primeval (2007; Gustave crocodile)
• Black Water (2007; Saltwater Crocodile)
• Alligator (1980; mutated giant alligator)
  • Alligator II: The Mutation (1991; mutated giant alligator)
• DinoCroc (2004; genetically-engineered Suchomimus/modern-day crocodile hybrid)
• Supergator (2007; genetically-engineered Deinosuchus)

Snakes

• Anaconda (1997; giant anacondas)
  • Anacondas: The Hunt for the Blood Orchid (2004; giant anacondas)
• Boa (2002; abnormally large boa constrictor)
• Boa vs. Python (2004; genetically altered boa constrictor and an abnormally large reticulated python)
• King Cobra (1999; mutant King Cobra/eastern diamond-backed rattlesnake hybrid)
• Python (2000; abnormally large reticulated python)
  • Python II (2002)
• Rattlers (1975; rattle snakes)
• The Snake King (2005; snake/human hybrid)
• Snakes on a Plane (2006; numerous poisonous snakes)
• Snakes on a Train (2006; numerous poisonous snakes)
• SSSSSSS (1973; humans turned into cobras)
• Copperhead (2008; abnormally large copperheads)
• Venom (1981; black mamba at home)

Worms

• Mongolian Death Worm(1959; enormous white worms)
• Slugs(1988; Giant Black Slugs)
• Tremors(1990; four big worms)

Multiple animals

• Prophecy (1979)
• The Day of the Animals (1977)

Other animals

This list includes cryptids, extinct animals, and mythological creatures.

• Aquanoids (2003)
• The Cave (2005)
• The Cavern (2005)
• C.H.U.D. (1984)
  • C.H.U.D. II: Bud the C.H.U.D. (1989)
• Cloverfield (2008; strange semi-aquatic giant reptile)
• Deep Shock (2003)
• The Descent (2005)
• Kraken: Tentacles of the Deep (2006; giant squid)
• The Phantom from 10,000 Leagues (1955)
• Reign of Fire (2002; dragons)
• Humanoids from the Deep (1980; genetically-engineered fish mutations)
• Tremors films
• Wyvern
• Yeti: Curse of the Snow Demon

Plants

• Dr. Terror's House of Horrors (1965; second story)
• The Happening (2008 film) (2008; airborn disease caused by plants)
• The Little Shop of Horrors (1960; American comedy film directed by Roger Corman. Written by Charles B. Griffith, the film is a farce about an inadequate young florist's assistant who cultivates a plant that feeds on human blood and flesh.)