Hedycarya arborea J. R. Forster & G. Forster

are eaten by

• Global Biotic Interactions: Anthornis melanura (Sparrman 1786)
• Global Biotic Interactions: Chloris chloris (Linnaeus 1758) (حسون أخضر أوروبي)
• Global Biotic Interactions: Cyanoramphus auriceps (Kuhl 1820) (ببغاء اصفر التاج)
• Global Biotic Interactions: Sturnus vulgaris Linnaeus 1758 (زرزور أوروبي)
• Global Biotic Interactions: Hemiphaga novaeseelandiae novaeseelandiae (Gmelin & JF 1789)

are host of

• Global Biotic Interactions: Armillaria limonea (G. Stev.) Boesew. 1977
• Global Biotic Interactions: Litschauerella clematidis (Bourdot & Galzin) J. Erikss. & Ryvarden 1976
• Global Biotic Interactions: Peniophora cinerea (Pers.) Cooke 1879
• Global Biotic Interactions: Trichoderma hunua (Dingley) Jaklitsch & Voglmayr 2014
• Global Biotic Interactions: Physcia adscendens

are parasitized by

• Global Biotic Interactions: Metrosideros fulgens Sol. ex Gaertn.
• Global Biotic Interactions: Adelencyrtoides inconstans Noyes 1988
• Global Biotic Interactions: Hypocrella duplex