### Strongylopus grayii: The Clicking Stream Frog
Identification
To spot a Clicking Stream Frog, look for a small, sleek amphibian (up to 50mm) with an exceptionally pointed snout and "legs for days." Their hind limbs are remarkably long, built for explosive leaps. Coloration is a cryptic palette of earthy browns, greys, or ochre, often featuring a dark, "Zorro-like" mask running from the snout through the eye to the shoulder. The most reliable field mark is the series of longitudinal skin folds (ridges) running down its back. Unlike the Striped Stream Frog (*S. fasciata*), *grayii* usually lacks bold, continuous dark stripes, opting instead for a mottled, camouflaged look.
Habitat & Range
This is one of South Africa’s most successful amphibians, ranging from the Western Cape fynbos through the Drakensberg mountains to the tropical coast of KwaZulu-Natal. You’ll find them in almost any damp spot—from garden ponds and roadside ditches to high-altitude seepages up to 2,500 meters. They aren't picky; if there’s a bit of moisture and cover, they’ll move in.
Behaviour
If you’re walking near water, you’ll likely hear them before you see them. Their call is a sharp, percussive "click," reminiscent of two marbles being struck together. While they are active both day and night, they are masters of the "leap and vanish" technique. When startled, they launch themselves into the air with incredible force, often landing in dense vegetation where their mottled skin makes them instantly invisible. During breeding season, males call from the water’s edge or tucked under overhanging grass.
Diet
These are opportunistic "sit-and-wait" predators. They station themselves in damp leaf litter or near the water’s edge, snapping up any small invertebrate that wanders too close. Their diet primarily consists of flies, small beetles, spiders, and moths.
Fascinating Fact
The Clicking Stream Frog is an "extremophile" of the frog world! While most amphibians perish in salty conditions, *S. grayii* has been found thriving in brackish water and even sea-spray zones along the coast—a rare feat of physiological endurance that allows them to colonize habitats where other frogs simply cannot survive.