Marri trees support over 80 native bee species in Western Australia

Research conducted by Curtin University has identified the Marri tree (Corymbia calophylla) as a critical resource for the survival of more than 80 species of native bees in Southwest Western Australia. This region is recognized as one of the world's most biologically rich yet threatened biodiversity hotspots.

Lead researcher Kit Prendergast noted that Marri trees serve as a vital food source, providing nectar and pollen particularly during late summer when most other plants have ceased flowering. For many bee species, the Marri is the only available food source during this period.

Beyond nutrition, the trees provide essential nesting resources. Bees have been observed nesting in small holes and between roots, while Megachilidae bees utilize the tree's iconic red sap to seal their nests. The study suggests the Marri acts as a “keystone species” or “magnet species,” playing an extraordinary role in maintaining regional biodiversity.