Cairns Birdwing

Fascinating facts about the Cairns Birdwing

• Spanning up to 25 centimetres, the Cairns Birdwing's wings are the largest of any Australian butterfly, with females laying around 120 eggs at a time on their host plants.
• In the Daintree Rainforest, the Cairns Birdwing's caterpillars feed on the Aristolochia plant, which is toxic to most animals, storing its poison and making the adult butterfly unpalatable to predators.
• Every year, Cairns Birdwings migrate from the coast to the Atherton Tablelands, a distance of around 100 km, to escape the heat and find their host plants, with some individuals flying up to 30 km in a single day.
• Scientists like Dr. Steve Williams have tracked the decline of the Cairns Birdwing due to habitat loss and climate change, with a 30% decline in population over the past 20 years, making conservation efforts crucial to protect this species.
• Cairns Birdwings can live up to 4-6 weeks in the wild, with some individuals surviving the dry season by hiding in humid, shaded areas, allowing them to emerge when the wet season brings an abundance of food and host plants.

At a glance

About the Cairns Birdwing

The Cairns Birdwing, scientifically known as Ornithoptera euphorion, is a strikingly beautiful butterfly native to the lush rainforests of northeastern Queensland, Australia. With a wingspan that can reach up to 15 centimeters, males are adorned with iridescent green and yellow patterns contrasted by a deep black margin, while females exhibit a more subdued palette of browns and yellows. These butterflies are not just a feast for the eyes; they are also remarkable for their unique life cycle, which begins when females lay eggs on specific host plants, primarily species of the vine genus Aristolochia. The larvae, known for their striking coloration that mimics bird droppings, undergo several molts before emerging as stunning adults, showcasing a transformation that captivates the imagination of naturalists and casual observers alike. In the wild, Cairns Birdwings are typically found in lowland rainforests, where they flutter gracefully among the foliage, sipping nectar from various flowering plants. Their behavior is both intricate and intriguing; males often engage in elaborate courtship displays, showcasing their vibrant colors to attract females. Interestingly, unlike many butterflies, Cairns Birdwings are known to migrate short distances in search of food sources, demonstrating a remarkable adaptability to their environment. This migratory behavior, combined with their specific dietary requirements, makes them particularly sensitive to changes in their habitat, hinting at the delicate balance they maintain with their ecosystem and the challenges they face in an ever-changing world.

Discover more wildlife