Orbs-
These are the most common anomaly reported amongst experiencers. They appear as a white, sometimes blue, ball of light that hovers over the ground. They can move very quickly and this can often be the first state they appear in before they become a full-bodied apparition. It is believed that orbs are the soul of a human or animal that has passed away and traveling from one place to another.

The Poltergeist-
The word poltergeist means "noisy ghost." It has the ability to make noise, move or knock things over and manipulate the physical environment. Many people have discussed witnessing things such as doors slamming, objects moving on their own, and lights turning on and off. A poltergeist is believed to be created by a living person who is experiencing an immense amount of stress, anger, or anxiety. This is a mass form of energy that a person is controlling unknowingly. The event usually begins slowly and then intensifies over time. While many times this kind of activity is harmless and ends quickly, they have been known to become dangerous.

Ectoplasm or Ecto-Mist-
May appear as a mist or fog and can appear to be swirling. Many people have witnessed this vaporous cloud several feet off the ground and can be stationary or move swiftly. These encounters have been captured on videos and photographs and appear to be white, gray, or black in color. Sometimes ectoplasms appear before becoming a full-bodied apparition.

Shadow People-
These entities are dark in color. Witnesses have described them as being darker than the dark. That even in a pitch black room, the figure will be seen. No facial features are reported except for glowing red eyes. They appear in a humanoid form and look to be made from the shadows themselves. They have been seen in the corner of rooms and move through walls. Normally when someone has noticed them, they move extremely quickly, many people reporting that they noticed something in the the corner of their eye, but then it appears to rush out of the person's view.
There are a few theories regarding to what shadow people may be, which can include interdimensional beings, extraterrestrials and demons. Encounters are usually accompanied by feelings of intense dread, and often, witnesses to these shadow people do not feel as though they have been in the presence of a being that was once human.

Residual Ghosts-
These entities are tied to a specific location, usually associated with a traumatic event or emotional experience. These entities replay that particular moment from their life over and over. These entities are like tape recordings. Their mental impressions from the traumatic event are projected onto objects in the form of energy to be replayed in certain conditions. These entities are sometimes called imprints because they're imprinted to a specific place and pattern of behavior.