AT A GLANCE
- Common Name: Augrabies Flat Lizard
- Scientific Name: Platysaurus broadleyi
- Category: Reptiles
- Subcategory: Lizards
- Range: Endemic to the Northern Cape province of South Africa and southern Namibia, restricted to the Orange River gorge around Augrabies Falls
- Habitat Type: Arid granite canyons, sun-baked rock outcrops, and sheer riverine cliffs within the arid Nama Karoo biome
- IUCN Red List Status: Least Concern
- Lifespan: 6 to 10 years
- Diet: Carnivorous/Insectivorous (swarming blackflies, beetles, grasshoppers, caterpillars, and occasional ripe namaqua figs)
- Average Size/Weight: Snout-to-vent length 6.5 to 8.5 cm; total length with tail 16 to 22 cm; weight 12 to 25 g
- Key Defining Feature: Extremely flattened body adapted for granite crevices, with males sporting a magnificent rainbow coloration of turquoise back, yellow forelegs, orange belly, and deep blue throat
Overview
The Augrabies Flat Lizard (Platysaurus broadleyi), also known as Broadley’s Flat Lizard, is a spectacularly colored reptile endemic to the rugged, sun-scorched granite canyons surrounding the Augrabies Falls on the Orange River in southern Africa. Adapted to an ultra-specialized lifestyle on sheer rock faces, this lizard possesses an extraordinarily flattened body that allows it to slip into hairline rock fissures to escape blistering desert heat and raptors. While females and juveniles are camouflaged in subtle brown stripes, adult males are living jewels, flashing a dazzling rainbow palette of electric blue, green, and orange.
Biology and Physical Characteristics
Platysaurus broadleyi exhibits extreme morphological dorsoventral compression: its skull, ribcage, and body are pressed remarkably flat, resembling a living pancake. Its granular scales are smooth, reducing friction when wedging into rock crevices. The species exhibits jaw-dropping sexual dichromatism. Adult males possess a vibrant dark green to turquoise-blue back, bright lemon-yellow front legs, a fiery orange-red belly, and an intense indigo-blue throat. In stark contrast, females are cryptically patterned with dark brown backs marked by three clean, pale-cream longitudinal stripes, ensuring optimal concealment against weathered granite.
Behavior and Ecology
Augrabies Flat Lizards are diurnal, heliothermic lizards that spend their mornings basking on exposed granite slabs to reach operating temperatures. They are renowned for their extraordinary athletic agility: when hunting swarming blackflies (Simulium chutteri) along the spray zone of the Orange River, they perform acrobatic leaps into mid-air, snatching flying insects on the wing before landing gracefully back on vertical rock faces. Males are fiercely territorial, engaging in vivid visual displays where they tilt their bodies sideways and arch their necks to flash their ultraviolet-reflective blue throats and orange bellies at rival suitors.
Conservation and Human Impact
The species is assessed as Least Concern on the IUCN Red List due to its high population density and effective protection within Augrabies Falls National Park, where thousands of individuals thrive safely. Although its total geographic range is relatively small (restricted to a narrow strip along the lower Orange River), its rock-face habitat is largely immune to agriculture or urban development. Ecotourism in the national park provides excellent public awareness and stewardship for this iconic African reptile.
Interesting Factoid
To catch their favorite food—river blackflies—Augrabies Flat Lizards leap straight off sheer granite cliff faces into the air, snatching flies mid-flight like miniature gymnasts before landing safely back on the rock.