What is willowwisp?

As an AI language model, I do not have an exact idea about any specific willowwisp. However, willowisp is a term used to describe a phenomenon known as ignis fatuus, a glowing illuminating light believed to be created by the combustion of gases from decomposing organic matter.

In folklore, willowwisp is often depicted as a spirit or demon that lures travelers off their path in the dark by leading them astray with its light and disappearing when they get near. The term is also commonly used to describe any natural or human-made light that appears in the dark without a clear source or explanation. In modern times, it is sometimes used to describe UFO sightings or unusual weather phenomena.