Overview
Fleay’s Barred Frog (Mixophyes fleayi) is a magnificent, large-bodied forest frog endemic to the high-elevation subtropical rainforest ranges of eastern Australia. Named in honor of the legendary Australian naturalist David Fleay, this nocturnal ambush predator is famed for its striking, two-toned golden eyes and powerful zebra-striped legs that enable monumental leaps through the rainforest understory.
Biology and Physical Characteristics
Mixophyes fleayi is a robust, muscular ground frog reaching up to 90 mm in length. Its dorsal coloration is a subtle light grey-brown adorned with irregular darker brown blotches and a distinct dark triangular patch between the eyes. Its long, powerful muscular limbs are crossed with bold, dark brown horizontal bands resembling zebra stripes. Its most captivating feature is its eye: the upper half of the iris is an intense, radiant pale blue to silvery-gold, while the lower half is a deep, rich chocolate brown.
Behavior and Ecology
Primarily nocturnal, Fleay’s barred frog hides beneath rotting logs and thick leaf litter layers by day, emerging after rain to hunt large forest invertebrates and smaller frogs. During spring and summer breeding, males broadcast a distinctive, deep guttural call—a stuttering ‘arrrrk’ followed by gentle clicks—from gravel stream banks. Females exhibit a remarkable nesting behavior: they use specialized fringed fingers to excavate a shallow nest bowl in shallow gravelly riffles, flipping fertilized eggs into the gravel where they adhere safely out of swift currents.
Conservation and Human Impact
Classified as Endangered, Fleay’s barred frog suffered severe population declines during the 1980s and 1990s caused by the pandemic outbreak of amphibian chytrid fungus (Batrachochytrium dendrobatidis). Habitat degradation from historic logging, feral pig rooting along stream banks, and siltation of breeding riffles also threaten lingering populations. Targeted habitat protection within World Heritage Gondwana Rainforests and monitoring of resilient breeding streams offer hope for long-term recovery.
Interesting Factoid
Fleay’s Barred Frog possesses mesmerizing ‘split-colored’ eyes: the top half shines like liquid gold or ice blue, while the bottom half is dark chocolate brown, giving it an otherworldly appearance in flashlight beams.
Last updated: October 2026