Willowisp eggs can sometimes be seen fluttering alone in the far distance, leading astray those who naively choose to approach them. Upon their appearance, the surrounding environment will significantly drop in temperature and will remain that way even hours beyond evanescing.
The Willowisp, as with practically any paranormal creature of Ark, is a poorly-understood enigma to the Science and Research Center.
Eeriek that can only be described as much more mischievous than usual are often seen with a winged, blue flamed candle instead of a torch. This mutualistic relationship between Willowisps and Eeriek is a newer phenomenon and is currently undergoing research to discover the significance.