Sunius bicolor (Olivier & A. G. 1795)

are eaten by

• Global Biotic Interactions: Sepedophilus marshami (Stephens 1832)

are preyed upon by

• Global Biotic Interactions: Synuchus vivalis (Illiger 1798)
• Global Biotic Interactions: Brachinus (Brachynolomus) explodens Duftschmid 1812
• Global Biotic Interactions: Paederus (Poederomorphus) littoralis Gravenhorst 1802
• Global Biotic Interactions: Pella limbata (Paykull 1789)
• Global Biotic Interactions: Ocypus (Matidus) nitens (Schrank 1781)

prey on

• Global Biotic Interactions: Acrotona (Acrotona) parvula (Mannerheim 1830)
• Global Biotic Interactions: Stenus (Stenus) nanus Stephens 1833
• Global Biotic Interactions: Tachyporus tersus Erichson 1839
• Global Biotic Interactions: Oxypoda (Atlantoxypoda) lurida Wollaston 1857
• Global Biotic Interactions: Oxypoda (Podoxya) brevicornis (Stephens 1832)