The magnificent Curtain Fig Tree can be found in the heritage-listed Curtain Fig Tree National Park, situated in the breathtaking Atherton Tablelands region of Far North Queensland, Australia. The park, part of the Wet Tropics World Heritage Area, is approximately a ninety-minute drive from Cairns. The vegetation of the park is a mabi rainforest, which is a complex notophyll vine forest that is native to the area and is classified as endangered.

The Curtain fig tree, similar to the Cathedral Fig Tree in Danbulla National Park, is a gigantic strangler fig tree estimated to be more than 500 years old. It boasts a trunk circumference of approximately 39 meters (128 feet) and is about 50 meters (160 feet) tall. The tree’s canopy spans an impressive 30 meters (98 feet) in every direction from its trunk, making it an awe-inspiring sight to behold.

The Cathedral Fig tree is towering and upright, while the Curtain Fig tree is slightly different. It fell and leaned against a neighbouring tree when its host rotted away, and over time, it also consumed that tree too. As a result, it now lies at an angle, creating an impressive curtain-like appearance.

Forest fauna

Once a host tree has fully decomposed, it creates a hollow area that provides a natural home for various animals. These animals, such as birds, bats, rodents, and insects, utilise the hollow space as a secure shelter, nesting site, or food storage area. The Papuan Frogmouth, Orange-footed Scrubfowl, reptiles, possums, and Lumholtz’s tree kangaroos are some species that inhabit the area around the tree. Furthermore, succulent fruits from strangler figs attract Rose-crowned Fruit Doves, Emerald Fruit Doves, and Pale-yellow and Grey-headed Robins. In the Curtain fig tree national park, forty-one bird species are listed as inhabitants.

Life Cycle of Strangler Figs

The life cycle of a strangler fig tree begins with a seed that an animal drops onto the branch of a host tree. The seed germinates and begins to grow as an epiphyte, meaning that it does not have its own roots in the ground. Instead, it gets its nutrients from the host tree.

As the strangler fig grows, it produces aerial roots which gradually descend along the trunk of the host tree, until they finally reach the ground. Upon contact with the ground, these roots start to absorb essential nutrients and water from the soil. This enables the strangler fig to thrive and grow bigger, eventually becoming self-sustaining.

The aerial roots of the strangler fig play a crucial role in supporting its growth. These roots wrap around the host tree trunk, forming a latticework that keeps the strangler fig steady and upright. Gradually, the fig’s roots will cover the host tree trunk, impeding the flow of nutrients and water, leading to the death of the host tree. However, the strangler fig will keep growing and eventually stand independently as a tree.

As time passes, the strangler fig tree steadily thrives and develops, yielding fruits that lure in wildlife to assist in spreading its seeds. This process repeats over and over again. Subsequently, the strangler fig tree becomes the host for other plants and trees, helping to create a rich and diverse ecosystem.

Waps and Fig Tree

The hollow spaces inside the strangler fig trees also play a vital role in the tree’s reproductive cycle. Many species of figs rely on specific wasps to pollinate their flowers and disperse their seeds. Significantly, each species of the fig wasp is only able to fertilise the flowers of one species of the fig tree. The female wasp bores into the fig and deposits her eggs. In the process, the wasp fertilises many of the surrounding flowers.

As the larvae grow, they secrete a substance that prevents the fig fruit from reaching maturity. This mechanism is crucial in protecting both the larvae and the fruit from being consumed. When the larvae mature, they emerge from the fig and fly off to find a new fig tree to lay their eggs.

Getting there

From Cairns, drive to Yungburra and head towards Atherton along the Gillies Range Rd. Then turn onto Fig Tree Road. A short drive down this road takes you to the carpark. From the carpark, it’s a short 180m return walk along an elevated boardwalk to the tree.

Strangler figs are a fascinating example of how plants can adapt to their environment. They are able to grow in dark and shady areas where other plants would not be able to survive. And they are able to kill their host trees, which frees up resources for the strangler fig to grow even larger.