Bats in real life come in a variety of species, which have a variety of diets. Some eat fruit, while others fly around hunting for insects, but the most infamous group consume the blood of animals like cattle. While they don't "suck" blood in the vampiric sense, they are the inspiration for the creature and, in return, the association with vampires means many fictional bats and their equivalents are considered to be bloodsuckers, or otherwise have a way of draining the life out of their food.
Vampire characters don't count for this trope, as for them sucking blood is just part of the package. As such, this is only for actual bats and their in-universe equivalents. For the vampire scenario, see Vampiric Draining.
Compare Bat Scare, which is another bat-related trope. Subtrope of Bat Out of Hell, as bats of the blood-sucking variety tend to be considered scary or vicious. Not related to Goddamn Bats, but they may overlap.
- Back to the Outback: The bat colony that helps the group is stated by Dave to drink warm blood, and Maddie tells one (Vlad) to get away from Pretty Boys neck. Interestingly, official material lists them as flying foxes, which are herbivores.
- Cat City: The Latin-American bat bandits kidnap a mouse to suck his blood, but the mouse's musical skills make them change their mind.
- Vampire Bats: The monsters are a colony of mutant bats that drink human blood. Their mutations have causes them to grow eight upper-jaw fangs instead of two, allowing them to drain immense amounts of blood at once, and their presence is first noticed when several human corpses turn up without a drop of blood in their veins.
- The Death Gate Cycle: Bloodsuckers, gigantic bats native to the Labyrinth, secrete a paralyzing venom through their fangs that renders their prey immobile and helpless as the bat drains every drop of blood from their bodies.
- A Song of Ice and Fire: The jungles of Sothoryos are said to be home to giant white bats that can drain a man's blood in seconds, among other terrors.
- In Yolngu oral traditions the Garkain is a bat thing that drinks blood, though sometimes it is depicted as bird-like instead.
- Dungeons & Dragons: The 1st Edition AD&D supplement Monster Manual II describes fire bats, creatures from the Elemental Plane of Fire. They attack other creatures by biting down on them with their razor-sharp fangs and drinking the victim's blood. Once they have drained blood for three minutes, they are satiated and return to their lair.
- Pathfinder: Sabosans are batlike humanoids who feed by drinking the blood of other beings, preferably other humanoids. While their true origins aren't known, they're rumored to descend from humans who were afflicted with vampirism but managed to avoid fully succumbing to it.
- Arc the Lad: Bat monsters all have the ability to suck life out of enemies, animated as sucking blood.
- Conker's Bad Fur Day: Exaggerated with Count Batula, an anthropomorphic vampire bat who turns Conker into a bat and tasks him with picking up the angry villagers invading his castle, and dropping them into Batula's grinder machine, which turns the villagers into red mush which Batula drinks up greedily.
- Donkey Kong '94: It's implied that the bat enemy is vampiric, as it makes a "suck-suck" noise when it touches Mario.
- Epic Battle Fantasy 4 "Blood Bats", whose description in the bestiary starts with: "A bloodsucking enemy"
- Golden Krone Hotel is a vampire-themed roguelike and so it also features the trope, but puts a spin on it by making the bats less vampiric, and more outright demonic, affiliated only with the other demons. This is likely so that the player would not be able to escape the wrath of these life-draining fiends by simply staying in Sorina's vampiric form.
- Guild Wars 2: Bats are an environmental enemy. Some steal health/hp (which is portrayed as red droplets); others cause bleeding, a Damage Over Time condition.
- Infra Arcana: The Vampire Bats, like the Giant Bats, they are said to be as tall as a human, and so are tougher than the most examples, but they can also directly heal themselves with every successful attack they inflict upon the player character.
- La Pucelle: The bit monsters, essentially small bats, all have the suck blood ability.
- Pokémon: Zubat and its evolution line are capable of learning the move Leech Life, which is described as a "blood-draining attack" that also replenishes the user's HP. All of Golbat's dex entries describe how it sucks blood even until it becomes too full and heavy to fly, and Crobat's entries also mention bloodsucking.
- Tribal Hunter: The tuxedo bat enemies attack Munch by latching onto him and sucking his blood and sapping his health which requires you to button mash to shake them off. If you let the bat keep sucking, it'll eventually overindulge and grow very fat, which will incapacitate it.
- Wario Land 4: Although this is not visible in-game, the manual's description of Wario's Bat Wario form describes Miniculas (small bat enemies that turn Wario into this form on contact) as sucking blood.
"When that twerpy little bat Minicula bites me and sucks my blood, I turn into a bat! My big, macho arms turn into puny little wings! By the way, what's my blood type? You sucked my blood, the least you can do is tell me that! What a pest!"
- Brandy & Mr. Whiskers: Double subverted in "The Curse of the Vampire Bat" where they meet a bat named Vlad. Whiskers is scared because "bats suck blood" but Vlad says he is a fruit bat. After some shenanigans, we discover that Vlad is indeed a blood bat, but that he specifically drinks only cow and horse blood and that he hides it because people are always too scared to hear any explanation.
- Count Duckula: In "Bloodsucking Fruit Bats of the Lower Amazon", Igor is summoning his new pet, a "bloodsucking fruit bat" and plots to use his pet to convert Count Duckula into the vampire that he truly is, but fails when he finds out that Nanny and Duckula have been treating the bat as a benevolent pet.
- The Grim Adventures of Billy & Mandy: Dracula himself clears up the misconception about vampires. Contrary to popular belief, vampires don't suck the blood of their victims, they scrape and lick their victims, like actual vampire bats.
Dracula: Vampires! Don't! Suck! They scrape and lick. [wiggles his tongue] Scrape and lick. [wiggles his tongue]
- My Little Pony: Friendship Is Magic: The vampire fruit bats in "Bats!" do a G-rated version of this in which they suck all the juice out of apples, acting as a menace on Applejack's farm.
- While no bat sucks blood, as such, three species of vampire bat exist — the common vampire bat, the white-winged vampire bat and the hairy-legged vampire bat, all found in South and Mesoamerica. They feed exclusively on blood (usually of birds and large mammals), which they obtain by biting open small wounds in their skin and licking up the blood as it flows out, relying on anticoagulants in their saliva to keep it from clotting until they're done.