A TikTok creator has earned an unusual nickname online after documenting a series of bizarre mosquito experiments that end with the insects being carefully preserved inside what viewers have dubbed a "graveyard notebook."The creator, who goes by Fatsocat, has built a following of more than 669,000 followers and 30 million likes through close-up videos exploring the tiny world of insects. While the account features a variety of bugs, it is the creator's ongoing campaign against mosquitoes that has captured the internet's attention, with some videos attracting as many as 19 million views.Instead of simply swatting mosquitoes, Fatsocat captures them alive and subjects them to unusual experiments before adding them to an ever-growing notebook collection.Among the experiments shown on the account are exposing mosquito larvae to rat poison and the liquid inside glow sticks, trapping adult mosquitoes with an unidentified substance, and even placing one against an ant-mimicking spider.But it is the ending of each video that has become the creator's signature and the moment that has left many viewers equal parts amused and disturbed.The notebook that shocked millionsIn one of Fatsocat's most-watched videos, which has amassed more than 63 million views, the creator allows a mosquito to feed on his blood before trapping it inside a syringe.After removing most of the air, he attaches a needle and draws cigarette smoke into the chamber. When the first attempt appears to have little effect, he repeats the process until the syringe visibly fills with smoke. "The mosquito struggled a little," the creator narrates. "Feeling dizzy is perfectly normal at this point, and falling asleep is too."Once the mosquito stops moving, the video takes an unexpected turn, even by his standards and for the first time for viewers. Fatsocat quietly opens a notebook and tapes the insect onto a page beside dozens of previously collected mosquitoes, each preserved beneath transparent tape.'Dexter of mosquitoes'The videos have spread beyond TikTok, with several Instagram pages reposting them and drawing thousands of reactions. Many commenters compared the creator to the fictional serial killer from the television series Dexter, although with mosquitoes replacing people.One viewer simply wrote, "Dexter of mosquitos." "Then I opened my notebook." Another commented, "Everything was fine until he brought out his diary of mosquito corpses."Others were equally stunned. "nah that's a graveyard not a notebook ," one user wrote.Not everyone found the videos amusing. One user commented, "Torturing anything is wrong." Others reacted with disbelief rather than criticism. "There's no way you get joy from this bro."The collection keeps growingIn another viral video, Fatsocat begins by announcing it is "day three of catching mosquitoes" before placing several insects inside a container with a burning mosquito coil."After inhaling a large amount of it, the mosquitoes completely lost the ability to move," he says.He then adds, "I quietly open my notebook to the very last page."The camera once again reveals page after page of preserved mosquitoes secured beneath clear tape, each accompanied by handwritten dates.Dates visible in the notebook range from May 30 through June 24, suggesting the collection had been growing for weeks despite the creator describing it as only the third day of catching mosquitoes.