Bloodsucker Biology?

So, i'm playing S.T.A.L.K.E.R, with the Last Day mod, you know, the call of chernobyl one that also has misery and some other addons mixed in. The thing is that this mod has a encyclopedia section but it only has a single section for the mod's features and nothing else.

I always loved the encyclopedia in Shadow of Chernobyl and at first i wanted to bring it back, add sections to the one in the last day mod and copy the old pda entries, but then i decided to expand on it and give more detailed information to give people something to read while they wait for it to be dark or they wait for their weapon upgrade to be ready.

I'm starting with the mutants and animals section, i'm writhing the bloodsucker first because i'm going on alphabetical order and i wanted your helpto come up with ideas about the zone's mutants, their biology, behavior, things like how do they develop, how do they digest food, where do they live, all that stuff would be great, any crazy theory you have

Bloodsuccer.

Didn’t one of the STALKER expanded universe books implied they were interdemional demons?

this is what i got so far, any opinions on things you would add/change would be great

Description:

"Experienced stalkers describe this semi-legendary beast as a tall, hunched humanoid with a mess of tentacles where its mouth should be. According to those who saw it and lived to tell the tale, the creature uses its tentacles to cling to the victim's throat, paralyze it, and suck it dry of blood. A dry, mummified shell is all that's left of what used to be a living human being. The most astounding feature of the Bloodsucker, however, is its ability to become invisible. Countless dead or missing stalkers are said to have perished in the merciless grip of a Bloodsucker. The lucky few who have survived an encounter tell spine-chilling tales of marshes and subterranean areas haunted by the Zone's version of Count Dracula."

Clasification:

Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Hominidae
Tribe: Krovosis
Genus: Krovosos

Physical characteristics:

•Basic characteristics:
Krovosos or Bloodsuckers are ground-dwelling, predominantly carnivorous nocturnal humanoids that inhabit the deeper areas of The Zone, mostly making lairs in it's tunnels and abandoned facilities in which they dwell in groups known as "families" while resting or storing their kill for later consumption. Recent test have proved that the Bloodsucker's DNA is highly similar to that of humans, ranging from 95-99% depending on what is counted, and they are the next closest living relatives to humans after snorks, burers and controllers. Because of this discoveries and their physical chacarteristics bloodsuckers have been calsified as primates.

This mutants most notable characteristics are it's optic camouflage which allows them to temporarily become almost invisible to the naked eye and the four tentacles protuding from it's jaw that they use to feed, characteristics on which this document will elaborate more on a later sub-section.

Bloodsuckers move around by walking and running bypedally. Adult specimens weight from 85 to 110 kg (187-242 lb) and have been measured from 1.8 to 2 m (5ft 9in to 6ft 5in) tall, with an arm span that stretches from 1.4 to 1.6 m (4ft 5in to 5ft 2in). They have huge hands with long fingers that end in extremely sharp claws and a very muscular frame. Their fibrous muscles and huge hearth and lungs allow them both great endurance and physical strength.

It is believed that this creature's lifespan ranges between 35 and 40 years and they reach sexual madurity when they are 4 years old. Oldest bloodsuckers are more darkly coloured and more resiliant that their younger counterparts, both being coloured on diferent shades of brown and gray while the swamp variety's skin has a light gray colour with patches of greenish brown. Both varieties skin is similar to that of a human, being soft to the touch but covered in some parts by thick, darker fur in their outer layer. Another characteristic of the bloodsucker's skin is it's extreme reaction high temperatures due to the lack of enough sweat glands to serve as a cooling mechanism. The bloodsucker's skin temperature tends to raise at alarming speeds and the creature needs to retreat to it's nest to cool down.

Like humans, bloodsuckers have individual finger prints. Their eye colour ranges from almost completly white to diferent shades of gray, some specimen's eyes are framed by a green or brigth orange ring around the iris.

Studies have shown bloodsucker blood is not reactive to anti-A and anti-B monoclonal antibodies, which would, in humans, indicate type O blood. Due to novel sequences, though, it is different enough to not conform with the human ABO blood group system, into which the other apes fit.

Bloodsucker's heart have an un unstudied ability - its secrete special enzymes which halt the coagulation process caused by incompatible blood types. Thanks to that, clotting does not occur even if the blood groups are different. Studies on how this mechanism works are still being conducted by specialists in and outside the Zone.

yo mamma

i don't know, never read any of those, they are impossible to find where i live

•Optic camouflage:
Perhaps the most fascinating and terrifying fact about these inhabitants of the Zone is it's hability to become nearly invisible to the naked eye. This is a topic that has been studied since the species discovery by the survivors of the third Ukranian goverment expedition into the Zone in 2008, but research is still being made in order to get a complete understanding of how this mechanism works.

So far it is theorized that millions of cells called chromatophores (also present in octopuses, squids and other mollusks) just below the surface of the skin are responsible for these remarkable transformations. The center of each chromatophore contains an elastic sac full of pigment wich may be colored on diferent shades of black, brown, orange, red or yellow. A complex array of nerves and muscles controls whether the sac is expanded or contracted according to the situation. Besides chromatophores, bloodsuckers also have iridophores and leucophores. Iridophores have stacks of reflecting plates that create iridescent greens, blues, silvers and golds, while leucophores mirror back the colors of the environment. As said before, these cells are connected to the nervous system, and their size is determined by muscular contractions and by controlling the size of the cells the bloodsuckers can vary their color and even create changing patterns.

Bloodsuckers also have extremely well developed eyes, which are believed to detect both the color and intensity of light. Using their excellent eyesight and chromatophores these mutants camouflage themselves by creating color patterns that closely match the enviroment around them. One of the most remarkable facts about this mechanism that still puzzles scientinsts to this day is it's extraordinary speed and sensitivity that allows the bloodsucker to move at it's top speeds while still maintaining it's camouflage updated to the ever-changing background giving the ilusion of the creature being transparent while most other species with similar mechanisms need to stay completly still for their camouflage to be effective.

•Digestion:
As said before bloodsuckers possess four tentacles coming out of their jaws, these apendages are mainly using for grasping their prey and feeding but they are also highly sensitive sensory organs with thousands of cells that allow the bloodsucker to feel changes in temperature and radioactive or anomalous particles in the air.

Each one of the bloodsucker's tentacles ends in a very sharp hook-shaped claw, the inside of these apendages is covered in what looks at a first glance like suction disks (like those present in cephalopods), said "suction disks" work like smaller mouths each is formed by a muscular ring of flesh with a row of fine "teeth" or denticles inside. Once attached to the prey these organs start doing a "sucking" motion moving back and forth and make a circular incision and cut the underlying capillarry beds, thus causing blood to pool. The outer rim of these organs creates a firm seal around the wound so that is can effectively suck the victim's blood into a small conduit resembling an artery inside the bloodsucker's tentacle that leads into the creature's esophagus.

The bloodsucker also has a set of vestigial teeth on it's top jaw behind this and hidden from plain sight there is what looks like a cephalopod's beak situated in the buccal mass and surrounded by the mutant's facial tentacles, this structure is composed by several blades set at an angle to each other. In feeding they slice their way through the skin of the host, leaving a Y-shaped incision. Behind the blades is the mouth, located ventrally at the anterior end of the cavity. The bloodsucker can use this organ or it's tentacles to feed from the blood of it's victims.

Bloodsuckers have a single sphincter from wich they excrete only liquid waste or a mix of chemicalsthey use to mark their territory.

One of the books implies that they have children and mate. They make dens and hunt for each other. Kind of interesting when you think about it, especially when you look at the Bloodsucker village and the fact they created a shrine of bodies.

i always thought it was the monolith guys that made that shrine

I'm not sure to be honest. Could be either. Don't think it was ever confirmed who did it.

i actually like it more if the bloodsuckers or some controller did it

this is exactly what i would like to go for