The practical effects for Species fell to Steve Johnson's XFX. Their practical Sil puppets and suits would complement the digital Sil realized by Richard Edlund's Boss Film Studios.
The Sil puppets and suits were based on sculptures by Mike Hosch and Norman Cabrera, and had heavy input from H. R. Giger himself. Johnson made sure to listen to Giger's requests as he wished to make him happy!


















