When people think about turtles in Panama, their minds usually go straight to the beaches. Panama is famous for its sea turtles, with enormous leatherbacks, colorful hawksbills and thousands of olive ridleys appearing along the country's Pacific and Caribbean shores. But there is another turtle world hidden farther inland. Panama's rivers, ponds, marshes, swamps, forest streams and seasonal wetlands are home to a fascinating collection of freshwater and semi terrestrial turtles.
These turtles are much less famous than their ocean going relatives, and that is part of what makes finding one so exciting. You are far more likely to encounter one quietly sitting beside a jungle stream, disappearing into muddy vegetation or crossing a rural road than you are to see one featured on a tourist sign.
One of the most interesting is the brown wood turtle, Rhinoclemmys annulata, known in Spanish by names including jicotea café, tortuga de bosque café, montañero and bambera. Despite being classified as a freshwater turtle, it is remarkably terrestrial and spends much of its time wandering through rainforest rather than swimming around in ponds. It occurs from Honduras through Central America and into northern South America, with Panama forming an important part of its distribution. It has been recorded from sea level to roughly 920 meters in elevation.
This is the kind of turtle that can surprise hikers. Instead of imagining a turtle sitting permanently in a pond, imagine a beautifully patterned shell slowly moving through the leaf litter of a humid Panamanian forest. Research from Panama has found that the species is active during the day, particularly in the morning, and that activity can increase following heavy rainfall. It also appears to eat young plants, ferns, vines and fallen fruit, potentially helping disperse seeds through the forest.
Then there are the mud turtles, members of the genus Kinosternon. These are considerably more aquatic and have an almost prehistoric appearance, with dark shells, relatively small bodies and hinged plastrons that allow them to protect themselves by closing the underside of the shell. Panama has representatives of the Kinosternon scorpioides complex, commonly known as the scorpion mud turtle. The species has a broad distribution through Central and South America, including eastern Panama.
Mud turtles are perfectly adapted to the muddy, shallow environments that occur throughout the Panamanian interior. Small ponds, marshes, slow moving streams and muddy forest pools can provide exactly the sort of habitat they prefer. During dry periods, freshwater turtles can become surprisingly difficult to find because some species retreat into mud or damp soil and remain inactive until conditions improve. Field research in Panama has documented freshwater turtles partially or mostly buried in wetland substrates during low water periods.
One of Panama's more unusual freshwater species is the narrow bridged mud turtle, Kinosternon angustipons. This small turtle has an extremely restricted distribution, occurring naturally only in Nicaragua, Costa Rica and northwestern Panama. Its Panamanian range is associated with the Caribbean lowlands, and it favors shallow ponds and small, slow moving streams with muddy bottoms. The species is currently classified as Vulnerable, and researchers emphasize that much remains to be learned about its ecology and populations.
Another fascinating turtle associated with Panama's inland waters is the black river turtle, Rhinoclemmys funerea, sometimes called the black wood turtle. It is an aquatic species associated with rivers, lakes, marshes and other freshwater environments. Its range includes parts of eastern Panama and northern South America. These turtles demonstrate just how different the interior turtle fauna can be from the spectacular marine turtles found along the coast.
What makes Panama particularly interesting is that the distinction between "aquatic" and "terrestrial" turtles isn't always straightforward. Some species spend much of their lives in water, others wander extensively through forests, and others move between wetlands and surrounding vegetation depending on rainfall and seasonal conditions. A Panamanian turtle doesn't necessarily need a large lake to survive. A muddy ditch, forest pool, swamp, stream or temporary wetland can become important habitat.
This is particularly significant during Panama's changing seasons. During the rainy season, the countryside fills with temporary pools and streams, creating an enormous network of small aquatic habitats. When the dry season arrives, some of those habitats shrink dramatically. Turtles have evolved different strategies for dealing with this seasonal cycle, including retreating into mud and remaining inactive until wetter conditions return.
And there is another fascinating connection between Panama's turtles and the forest itself. Turtles aren't simply inhabitants of the landscape; they can participate in the movement of nutrients and seeds through ecosystems. A turtle eating fruit on one side of a forest and later moving somewhere else can transport seeds. A turtle consuming vegetation, insects or carrion becomes part of the food web. Even the quietest animals on the forest floor can have ecological roles that are easy to overlook.
Unfortunately, these turtles face many of the same problems confronting wildlife throughout the tropics. Habitat destruction is a major concern for species such as the brown wood turtle, while collection for food or pets can also affect some populations. The brown wood turtle is currently listed as Data Deficient, meaning scientists do not have enough information to confidently determine its overall population status. That doesn't mean it is safe; rather, it demonstrates how little we know about some of Panama's less conspicuous wildlife.
Perhaps the most remarkable thing about Panama's freshwater turtles is how easily you can miss them. A colorful poison dart frog announces itself with brilliant colors. A toucan makes itself obvious with a giant bill and loud call. A monkey crashes through the canopy. A turtle, meanwhile, may sit motionless beneath a leaf for hours.
Then suddenly, after a tropical rainstorm, you see one crossing a trail.
It stops.
You stop.
For a few seconds, you are looking at an animal that has evolved to survive Panama's endlessly changing mixture of rainforest, wetlands, rivers and seasonal waterways.
Panama's turtle story is therefore much bigger than its famous sea turtles. Beyond the beaches lies another world of brown wood turtles, mud turtles and river turtles living quietly in the country's interior. They are residents of the jungle rather than visitors from the ocean, and finding one can be one of those wonderfully unexpected moments that makes exploring Panama's forests so rewarding.