Per 
Item #: SCP-XXXX
Object Class: Euclid
Special Containment Procedures: SCP-XXXX is to be kept in a standard humanoid containment cell at Site-17, following standard protocol for humanoid SCP containment. This includes providing bedding, clean clothes, and necessary hygienic products regularly, as well as meals three times per day. A mental evaluation should be conducted every two weeks, and its containment cell be monitored by at least two staff of Level-2 Clearance between 0900 hours and 2200 hours.
Description: SCP-XXXX is a humanoid male, approximately 20 years in age, standing at 1.8 meters tall and weighing around 43 kilograms. It is capable of limited speech, but mainly vocalizes using replications of sounds made by various different animals. To date, there is no estimated limit to the number of vocalizations SCP-XXXX is capable of making1, which includes imitations of canids, avians, reptiles, and aquatic mammals. Personnel who hear the vocalizations of SCP-XXXX are unable to discern the difference between the entity and the vocalizations of the animal it is mimicking. The sounds that SCP-XXXX makes also have an affect on any animals within 30 meters of the entity, causing them to seek out SCP-XXXX with varying intentions (see Test Log for more details).
Addendum-01: Recovery log: SCP-XXXX was recovered on September █, 20██ after Foundation personnel came into contact with it while in custody at the ██████ Police Department in ██████, Illinois. The subject was reportedly found after local law enforcements searched the apartment of Eleanor █████ when she was reported missing by her landlord. When the police forced their way in, █████ was nowhere to be seen, and SCP-XXXX was discovered hidden in the bedroom, surrounded by a small group of rattus rattus. Witnesses report that the subject was communicating with the rats by emitting a series of chirps and squeaks, which the rats responded to in a positive way. Upon realizing that it had been discovered, SCP-XXXX made several loud shrieks, which prompted the rats to attack the officers present while the subject attempted to flee. The subject was quickly apprehended by an officer standing by the entrance of the apartment and brought in for questioning. After a brief investigation, Eleanor █████ was found dead in her car several meters away from the apartment building, having overdosed on pain medicine three weeks prior.
The following is an interview conducted by Detective ███████ during SCP-XXXX's time at the ██████ Police Department.
Interviewed: SCP-XXXX
Interviewer: Detective ███████
[BEGIN LOG]
Detective ███████ opens the door to the interrogation room and walks inside. SCP-XXXX is heard dragging its chair back and forth before it stops as Detective ███████ sits down at the other end of the table.
Detective ███████: You must be the kid I've heard about. My name is Detective ███████, but you can call me Abe. I'm just gonna ask you a few questions about what happened back at the apartment, okay?
There are a few seconds of silence before SCP-XXXX speaks.
SCP-XXXX: Talking is… hard. Not know a lot of words.
Detective ███████: What do you mean by that?
SCP-XXXX: Not… know words. Don't know a lot of words. Hard to… understand people words, sometimes. Critter words are better.
Detective ███████: Okay, then. I'll try to make it simple for you.
Detective ███████ can be heard flipping through some papers, which have since been identified as the reports made by local law enforcement regarding the █████ Apartment incident.
Detective ███████: What's your name?
SCP-XXXX: …Mason.
Detective ███████: Do you know the woman living in that apartment?
SCP-XXXX: Um… Oh, yeah. That's Mama.
Detective ███████: She's your mother? [The landlord] never mentioned anything about her having a son.
SCP-XXXX pauses.
SCP-XXXX: I… I'm not supposed to let people see me. Mama says I'm a secret. I gotta stay in so no one sees me.
Detective ███████: Is that why you tried to run away?
SCP-XXXX: Yeah.
Detective ███████: Well, thank you for being honest. How long were you alone in that room?
SCP-XXXX: Wasn't alone. The rats were with me.
Detective ███████: The rats?
SCP-XXXX: Yep. They're my friends.
Detective ███████ looks through the reports again.
Detective ███████: Oh, I see. Well, anyways, when was the last time you saw your mother?
SCP-XXXX: Um… I think it was… seven days, three times.
Detective ███████: Seven days three times? Do you mean twenty one days?
SCP-XXXX: I think so.
Detective ███████: And you didn't think to call anyone or go looking for her?
SCP-XXXX: Can't let people see me. Mama always comes back, and the rats help me get food. Wasn't worried. Mama always comes back.
Detective ███████: So she's done this before?
SCP-XXXX: Yeah. Not this long, though. She should be back soon.
Detective ███████: Hopefully. The police are looking for her, so any information you can give us will be helpful in finding her. Did she say where she was going?
SCP-XXXX stays silent for several seconds.
Detective ███████: Mason?
SCP-XXXX: I… I don't know. The rats told me she wasn't coming back. Said they smelled some bad stuff in her bag when she left. Said she was gonna die.
Detective ███████: The rats told you?
SCP-XXXX: They're just kidding. Mama wouldn't just go and die. She… She wouldn't do that… Mama wouldn't…
SCP-XXXX begins crying and pulling its hair in distress. Detective ███████ attempts to approach SCP-XXXX, but is quickly shunned by SCP-XXXX. The subject starts to scream loudly, emitting sounds similar to that of a wounded dog while it stands up and runs for the door.
Detective ███████: Mason! Mason, stop!
Detective ███████ stands up and grabs SCP-XXXX's arm, causing SCP-XXXX to yelp and collapse on the floor. A short struggle between SCP-XXXX and Detective ███████ ensues for few seconds until several rats emerge from between cracks in the walls and floors and swarm Detective ███████. The rats proceed to bite and scratch Detective ███████, which forces him to let go of SCP-XXXX. Officers attempting to enter the interrogation room are also swarmed by rats and forced to flee while the rats [REDACTED] the detective, resulting in his death.
[END LOG]
Closing statement: Foundation personnel were called in after word got out about the "Rat Attack," as locals called it, in the ██████ Police Department. SCP-XXXX was sedated and brought in to Foundation custody, and all witnesses were questioned and given a Class-A amnestic. A cover story was put in place for the death of Detective ███████, which stated that he died as a result of a wild animal attack while he was walking home.
TESTING LOG2
LOG FORMAT
Animal
Vocalization of SCP-XXXX
Result
Animal: Cocker spaniel.
Vocalization of SCP-XXXX: Barking and whining, indicating excitement.
Result: Subject approaches SCP-XXXX rapidly, and the two engage in play behavior for several minutes.
Animal: Scarlet macaw.
Vocalization of SCP-XXXX: Single squawk followed by several shorter squawks.
Results: Subject responds to SCP-XXXX with its own squawk. The two continue to caw at each other until researchers "can't handle the noise anymore" and end the experiment.
Animal: Red fox.
Vocalization of SCP-XXXX: Whining and gekkering, along with body language that indicated playfulness.
Result: The fox circles around SCP-XXXX excitedly. The two begin chasing each other around the testing chamber and occasionally wrestle with each other, although SCP-XXXX is seen to be holding back and allowing the subject to dominate it.
Note: I don't think I've ever seen anything cuter in my entire career. -Researcher Crystal █████.
Animal: House cat.
Vocalization of SCP-XXXX: Soft trilling and purring.
Result: The cat approaches SCP-XXXX and sniffs it curiously. SCP-XXXX lays down on its front and trills louder, prompting the cat to lay beside it. The two remain there for nearly an hour before researchers end the experiment.
Animal: Bengal tiger.
Vocalization of SCP-XXXX: Chuffing.
Result: The tiger walks over to SCP-XXXX and rubs its head against it, which SCP-XXXX reciprocates. When D-Class personnel enter the testing chamber to re-contain SCP-XXXX and the tiger, SCP-XXXX begins whining and groaning in distress, which prompts the tiger to growl at the D-Class and swipe at them if they get too close. The tiger moves to stand in front of SCP-XXXX and remains there until staff tranquilize it and sedate SCP-XXXX.
Note: I think this gives us some pretty good insight of SCP-XXXX's memetic effect on animals, however we'll need to run more tests if we want anything conclusive. -Head Researcher Ethan ████████.
Animal: Grey wolf.
Vocalization of SCP-XXXX: A yip, followed by growling and barking.
Result: SCP-XXXX had previously been instructed to aggravate the wolf using only vocalizations. The wolf stares at SCP-XXXX and bares its teeth while walking around it at a slow pace. Once the wolf is within 2 meters of SCP-XXXX, the subject stops growling and goes silent. The wolf resumes normal behaviors, and all prompting from researchers do not yield any further vocalizations from SCP-XXXX.
Animal: Thoroughbred stallion.
Vocalization of SCP-XXXX: A snort, followed by a squeal.
Result: SCP-XXXX was once again instructed to aggravate the animal in question with vocalizations. The horse rears back and attempts to escape the testing chamber. SCP-XXXX is instructed to approach the horse, which it does. The horse bucks at SCP-XXXX, but misses, and SCP-XXXX falls to the ground and crawls to the other side of the chamber. It curls itself into a ball and begins to whinny and nicker in a way that researchers describe as "apologetic" in tone. The horse relaxes and walks over to SCP-XXXX, then lays down next to it and nudges its legs with its muzzle. SCP-XXXX pets the horse and mutters "pretty boy" several times before researchers end the experiment.
At this time, testing is currently suspended. Further information may be provided by Head Researcher Ethan ████████ for authorized personnel.
