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.
- The Latin-American bat bandits in Cat City kidnap a mouse to suck his blood, but the mouse's musical skills make them change their mind.
- In the Doctor Who story "State of Decay", Aukon commands a swarm of blood-sucking bats.
- Dungeons & Dragons, 1st Edition AD&D supplement Monster Manual II. The fire bat is a creature 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.
- In 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.
- In 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: From the fourth game, "Blood Bats", whose description in the bestiary starts with: "A bloodsucking enemy"
- In 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.
- The bit monsters, essentially small bats, from La Pucelle all have the suck blood ability.
- Pokémon: The Pokemon 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.
- Dracula himself clears up the misconception about vampires in The Grim Adventures of Billy & Mandy. Contrary to popular belief, vampires don't suck the blood of their victims. Bringing up the comparison to actual vampire bats, they scrape and lick their victims.
Dracula: Vampires! Don't! Suck! They scrape and lick. [wiggles his tongue] Scrape and lick. [wiggles his tongue]
- Double subverted in Brandy & Mr. Whiskers episode "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.
- 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.
- In Count Duckula episode "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.