- Macadamia nuts are often fed to Hyacinth Macaws in captivity. These large parrots are one of the few animals, aside from humans, capable of cracking and shelling the nut.
- Macadamia nuts are toxic to dogs. Ingestion may result in macadamia nut toxicosis, which is marked by weakness with the inability to stand within 12 hours of ingestion. Recovery is usually within 48 hours.
- The trees are also grown as ornamental plants in subtropical regions for their glossy foliage and attractive flowers.
- Macadamia species are used as food plants by the larvae of some Lepidoptera species including Batrachedra arenosella.
- Macadamia nuts are often used by law enforcement to simulate crack cocaine in drug stings. When chopped, the nuts resemble crack cocaine in color.
(stolen from wikipedia)