Do Vampires Poop?
THE SCIENCE : SOME FACTS ABOUT BLOOD SUCKERS
The act of feeding on blood is called hematophagy (HEE-MATT-OH-FAGE-EE) It exists in most branches of the animal kingdom. Think mosquitoes, leeches, lampreys, and vampire bats.
FUN FACT: The type of feeding, utilizing specialized structures to extract blood for digestion is called phlebotomy. Yes, that phlebotomy. Like when you get blood drawn at a lab. You’re being phlebotomized.
Many of these little vampires use what’s called hemo biochemical solutions, which help keep the blood from coagulating too soon, and also to serve as a mild anesthetic so the blood-suckee won’t be as apt to say “Hey, could you maybe not?”.
But what about the poop?
Let’s look at our mammalian example, seeing as vampires would…I suppose be considered mammals. Right?
Or are they? They’re not warm blooded…unless they are? I’m gonna have to write more essays.
Vampire bats ingest almost half their body weight during a meal. According to multiple sources, the vampire bat begins to urinate within a few minutes after feeding. This helps to alleviate the sheer scale of liquid absorbed form their meal. This specific evolution most likely happened to help aid the vampire bat in taking flight once the meal was done. Because, let us remember, our fair little friend just doubled her bodyweight.
Note: If say, a 180 pound strapping stud of a vampire man did the same, he would have to ingest roughly 90 pounds of blood. That’s 1,440 ounces. Or 42.6 liters ( 11.25 gallons for you filthy yankees). The human stomach can usually hold somewhere around 4 liters of fluid when fully distended, roughly one gallon.
The average human has anywhere between 4.5 - 5.5 liters of blood in their body (1.2 - 1.5). Thus, our strapping vampire man would need to feast on roughly 8 ½ humans to complete his meal.
Fascinating!
After their initial tinkle, the vampire bat will usually return to their colony to rest and finish digesting. And this final stage of digestion consists their bodies creating a sort of SUPER pee, full of urea (formed in the liver, the final stage of protein metabolism, and blood is quite protein rich for all of you low carb fans out there).
And our little furry flying friends must repeat this process every two days lest they wither away and die. I imagine someone would notice if over 1,500 people went missing every year PER vampire. If there were just 100 vampires in the world, that would be almost 200 thousand people! Per year! Ghastly, isn’t it?
So, long story short? Vampire bats kind of poop. From what I could discern in my thrilling studies, it is more of an ammonia laced waterfall of death. Their diet is entirely liquid based, and with the addition of specialized digestive evolutionary traits, the bats are able to fully digest or break down most of what humans could not.
So either vampires would constantly be peeing, or we have more to consider. You can actually see a beautiful representation of this idea in Guillermo Del Toro’s “The Strain”, where vampires are peeing pooping piles of disgusting. That’s where that logic derives from, I’m guessing.
FUN FACT: If we follow the science of vampire bats, our mammalian brothers in blood, then vampires would also be pretty immune to most bloodborne pathogens. The vampire bat has not only evolved to be an obligate vampiric little cutie, it’s digestive tract has such a massive biome of bacteria it is pretty safe from most pathogens. So vampires won’t get malaria. Cool.
Join us next time for a look into leeches, mosquitoes, and other almost entirely irrelevant things.
Cheers!
In this time of infectious diseases, I think we should revisit this, yeah? REBOOT!!!!














