If you’ve ever walked along the streams and rivers of Mount Makiling, you might have caught a glimpse of what looks like a tiny crocodile darting across the rocks or slipping into the water. Don’t be alarmed—you’ve just encountered one of the Philippines’ most fascinating endemic reptiles: the Spiny Waterside Skink, or as it’s more commonly known, the Philippine Crocodile Skink (Tropidophorus grayi).
A Miniature Crocodile in the Forest
The Philippine Crocodile Skink earns its name from the distinctive serrated scales running along its body. These raised scales give this small lizard an armor-plated appearance strikingly similar to its much larger crocodilian namesake, making the skink look like a miniature crocodile. The species’ coloration ranges from wood-like brown to mostly black, helping individuals blend into their forest stream environments.
Life Along the Water’s Edge
True to its waterside name, Tropidophorus grayi makes its home alongside rivers and lakes, as well as in forest streams at elevations from sea level up to 800 meters. Mount Makiling’s network of streams and waterways provides ideal habitat for these aquatic specialists. These skinks feed on invertebrates and insects found in their waterside habitats.
A Philippine Original
The Philippine Crocodile Skink is endemic to the Philippines, meaning it’s found nowhere else on Earth. This species is distributed across several major islands, including Luzon (our home here at Mount Makiling), Panay, Polillo, Leyte, Negros, Masbate, and Cebu.
One interesting aspect of crocodile skink biology is their reproductive strategy. These skinks are ovoviviparous, which means the eggs develop and hatch inside the mother’s body, and she gives birth to live young rather than laying eggs.
Threats and Conservation
Like many Philippine endemic species, Tropidophorus grayi faces significant threats. Deforestation destroys the forest streams and waterside habitats these skinks depend on, while environmental pollution degrades the water quality and ecosystems they need to survive.
What You Can Do
Protecting the Philippine Crocodile Skink means protecting the watersheds and forest streams they call home. When visiting Mount Makiling or other natural areas, practice Leave No Trace principles: carry out all trash, avoid using soaps or detergents near water sources, and stay on established trails to minimize erosion that can cloud streams with sediment.
If you’re fortunate enough to spot a crocodile skink during your visit, observe from a respectful distance and resist the urge to handle or disturb it. These creatures play important roles in maintaining the balance of their ecosystems.
As we celebrate this remarkable species as our Wildlife of the Month, let’s remember that Mount Makiling’s streams harbor species that exist nowhere else on Earth. The next time you cross a forest stream on the mountain’s trails, take a moment to appreciate these miniature dragons that call those waters home. (For. MMCaña)
The Makiling Center for Mountain Ecosystems features a different species each month to showcase the incredible wildlife diversity of Mount Makiling. Visit us to learn more about our native fauna and how you can contribute to their conservation.