Trichoglossus moluccanus, commonly known as the rainbow lorikeet, is native to the coastal regions of eastern and northern Australia. It is also found in smaller numbers on the islands of Indonesia, Papua New Guinea, and the islands of the Solomon Islands.

The rainbow lorikeet typically inhabits diverse environments ranging from moist coastal rainforests to dry, open woodlands. They are often found in urban areas near parks and gardens, where they can find abundant food sources. The species prefers areas with dense vegetation where flowering plants are plentiful.

Rainbow lorikeets play a crucial role in their ecosystem as pollinators. They feed on nectar and pollen, facilitating the pollination of various flowering plants. Their brush-tipped tongues are specially adapted for this feeding habit. The birds are social, often seen in flocks, and adapt well to human presence, thriving in both natural and urban habitats.