Night Flutter

The Night Flutter, or as it is known by it's more technical name "Avian Monster (Type B)" is essentially a more corrupted version of the Air Screamer. Whereas the Air Screamer inhabits the Fog World exclusively, Otherworld is home to the Night Flutter. It is known for it's absolute ferocity when it comes to combat - the creature will make a beeline for their prey and quickly attack it whilst moving around constantly.

The monster has a far more decrepit appearance than it's Fog World brethren where it's face, including it's eyes and beak have been overcome with worms that have devoured what was once there, with a large gaping maw. This brings it more inline with how the Wormhead appears which is a ground-based Otherworld creature. The worms themselves appear to originate from the base of the neck.

Interestingly, the Night Flutter has a more human-like body shape than the Air Screamer with a recognisable torso, hips, legs and feet. It's also quite large in comparison with a wide wing span. It's curious how they manage to stay airborne with all that mass under their wings.

As well as great strength they also have incredible durability. Unlike most creatures which Harry Mason encounters, the Night Flutter simply cannot be beaten with melee weapons such as the Hammer or the Pipe. In fact, even the Handgun is an ill-advised weapon - something with more power and pushback is required. Running away isn't necessarily an option either as they are so fast that they can catch up to Harry easily as they can fly faster than him when he is running at his top speed.

In terms of their symbolism, they represent Alessa Gillespie's hatred of slithering creatures and insects like worms. Their appearance is also likely based on her skewed interpretations of flying dinosaurs and pterosaurs after she read Sir Arthur Conan Doyle's The Lost World.