The Stirges, also known as the Stirges Chapter or Space Owls, are a Space Marine Chapter of some infamy throughout the greater Imperium. Known for their mystic traditions derived from the culture of their homeworld, Polyphate, the Stirges' beliefs revolve around divining the Emperor's will through the interpretation of signs of His will within the physical universe. Unfortunately these beliefs are what make the Stirges both capricious foes and unreliable allies, for so often have they abandoned and circumvented others in pursuit of one of their so-called "omens". Thus this Astartes Chapter has become synonymous with misfortune, oftentimes on a near-catastrophic scale.