### Identification The Southern Foam-nest Frog (*Chiromantis xerampelina*) is a large, charismatic arboreal specialist, reaching up to 90mm in length. Its skin is surprisingly dry and "warty" for a frog, often resembling the rough bark of an Acacia tree. Its most striking feature is its color-changing ability: in the heat of the day, it turns a brilliant, chalky white to reflect sunlight, but shifts to a mottled, dark grey or brown at night or when stressed. To distinguish it from other tree frogs, look closely at the "hands." It possesses a unique "two-on-two" finger arrangement, where the inner two fingers are opposable to the outer two, providing a powerful, chameleon-like grip on thin twigs.
### Habitat & Range This species is a staple of the Southern and Eastern African bushveld. It thrives in lowland savannas and subtropical shrublands, ranging from north-eastern South Africa up through Mozambique and into Kenya. While they are arboreal, they aren't restricted to deep forests; you’ll frequently find them perched on the rafters of safari lodges or tucked into the crevices of man-made structures near water sources.
### Behaviour Observing a breeding colony is a naturalist’s highlight. During the rainy season, these frogs engage in "communal nesting." A female will emerge on a branch overhanging a pool, joined by several males. Together, they whip a protein-rich oviduct secretion into a massive, meringue-like foam nest using their hind legs. The foam hardens into a protective crust, keeping the eggs moist. After a few days, the center liquefies, and the tadpoles "rappel" down into the water below.
### Diet As nocturnal sit-and-wait predators, they are the "pest control" of the savanna. They forage primarily for moths, beetles, and crickets. Photographers can often find them stationed near porch lights at night, capitalizing on the insects attracted to the glow.
### Fascinating Fact Despite being amphibians, these frogs are functionally "waterproof." They possess a specialized skin chemistry that allows them to lose water at a rate as low as a desert-dwelling reptile. They can even excrete uric acid—a trait typically reserved for birds and reptiles—to survive extreme heat that would desiccate any other frog!