Brillia modesta (Meigen 1830)

are eaten by

• Global Biotic Interactions: Trissopelopia longimana (Staeger 1839)
• Global Biotic Interactions: Zavrelimyia barbatipes (Kieffer 1911)
• Global Biotic Interactions: Plectrocnemia conspersa (Curtis 1834)
• Global Biotic Interactions: Plectrocnemia conspersa (Curtis 1834)
• Global Biotic Interactions: Plectrocnemia conspersa (Curtis 1834)

are preyed upon by

• Global Biotic Interactions: Serratella ignita (Poda 1761)
• Global Biotic Interactions: Gasterosteus aculeatus Linnaeus 1758 (Banstickle)
• Global Biotic Interactions: Glossiphonia complanata (Linnaeus 1758)
• Global Biotic Interactions: Planaria torva (Müller OF 1773)
• Global Biotic Interactions: Thymallus thymallus (Linnaeus 1758) (Grayling)

eat

• Global Biotic Interactions: Amphora inariensis
• Global Biotic Interactions: Amphora pediculus
• Global Biotic Interactions: Cocconeis pseudothumensis
• Global Biotic Interactions: Amphora libyca
• Global Biotic Interactions: Sellaphora pupula