Overview
Buckley’s Glassfrog (Centrolene buckleyi) is an exquisite and fragile jewel of the high-altitude Andean cloud forests, inhabiting cascading mountain torrents across Colombia, Ecuador, and northern Peru. Reaching elevations over 3,000 meters above sea level, this emerald anuran represents one of the highest-elevation glassfrog species known to science. Named in honor of 19th-century naturalist Clarence Buckley, it features striking translucent ventral skin that offers a clear view of its beating heart, digestive tract, and internal organs.
Biology and Physical Characteristics
The morphology of Centrolene buckleyi is adapted for cold, high-altitude torrent environments. Its dorsal surface is a bright lime-green punctuated by delicate yellowish or white dots that mimic droplets of mountain mist resting on foliage. Ventrally, its parietal peritoneum is completely transparent, revealing the white visceral organs and pulsating red circulatory system. Adult males possess a sharp, forward-pointing humeral spine on each upper arm bone, which they employ as physical weaponry during aggressive territorial wrestling matches with rival males over prime breeding leaves.
Behavior and Ecology
Buckley’s glassfrogs are nocturnal, riparian specialists active along fast-flowing, oxygen-rich mountain streams. Males perch on the upper surfaces of leaves overhanging rushing torrents, emitting high-pitched, piping whistle calls to attract prospective mates. Following courtship, the female deposits a gelatinous clutch of pale green eggs on leaves suspended above the water. Males often remain nearby to defend the clutch from predatory insects and dehydration. Upon hatching, the tadpoles drop directly into the fast-flowing stream below, burying themselves in riverbed gravel to complete larval development.
Conservation and Human Impact
Centrolene buckleyi is classified as Vulnerable by the IUCN due to ongoing habitat degradation across the tropical Andes. High-elevation cloud forest streams face severe threats from agricultural runoff, cattle grazing, logging, and water diversion. Furthermore, like many montane Andean amphibians, this species has experienced localized declines linked to the pathogenic chytrid fungus (Batrachochytrium dendrobatidis). Preserving protected riparian corridors and maintaining pristine cloud forest watersheds are critical to its long-term survival.
Interesting Factoid
Adult male Buckley’s glassfrogs bear sharp, curved bony spines protruding from their upper arm bones, which they lock together like miniature rapiers when wrestling rival males for territorial breeding perches.
Last updated: October 2026