Yellow-spotted River TurtlePodocnemis unifilisWhere and when to see them

The Yellow-spotted River Turtle is a freshwater turtle native to the Amazon and Orinoco river basins of South America. It belongs to the side-necked turtles, which fold their necks sideways beneath the shell rather than pulling their heads straight back. Its common name refers to the yellow markings on the head, most conspicuous in young turtles and adult males. Although widespread, it faces pressure from collection of adults and eggs, habitat degradation, and changes to river systems.

Size

Shell length up to about 50 cm; females are substantially larger than males.

Weight

Large females can weigh around 12 kg; males are much lighter.

Lifespan

Several decades; lifespan in the wild is poorly documented.

Status

Vulnerable (IUCN).

These turtles spend much of their time in the water but regularly bask on exposed logs and banks. Several individuals may share a basking site, slipping into the water when disturbed. They move between river channels, lakes, and flooded habitats as water levels change. Females come ashore to dig nests in exposed sand or other suitable riverbank substrates. Nesting generally coincides with locally falling or low water, when nesting ground is available. Unlike some related river turtles, they often nest individually or in loose groups rather than enormous synchronized gatherings. After laying and covering their eggs, females leave the nest, and hatchlings make their way to the water without parental care.

• It folds its neck sideways to shelter its head beneath the shell.
• Its scientific name, unifilis, refers to its single chin barbel.
• Nest temperature influences whether developing hatchlings become male or female.
• Adult females often lose much of the bright yellow head pattern seen in young turtles.

Wildlife opportunities depend on the river reach, water levels and species. River-specific viewing months have not been confirmed; general species seasons are not a local sighting forecast.

The species inhabits rivers, tributaries, floodplain lakes, lagoons, and other connected freshwater habitats throughout much of the Amazon basin. It commonly uses relatively quiet water, including sheltered river margins and backwaters. During high water, it can enter flooded forests and other seasonally inundated areas. Logs and exposed banks provide basking places, while accessible shorelines offer nesting sites as water recedes. Its habitat use is closely linked to the annual flood cycle.

The Yellow-spotted River Turtle is omnivorous, with plant material forming a substantial part of its diet. It eats aquatic vegetation, leaves, fruits, and seeds, including material that falls into the water from flooded forest. It also takes small invertebrates and carrion when available. Diet varies with age, habitat, and seasonal food availability.

Common name

Yellow-spotted River Turtle

Scientific name

Podocnemis unifilis

Animal group

Reptiles

Size

Shell length up to about 50 cm; females are substantially larger than males.

Weight

Large females can weigh around 12 kg; males are much lighter.

Lifespan

Several decades; lifespan in the wild is poorly documented.

Status

Vulnerable (IUCN).

Identification

Look for an oval, moderately domed shell that is usually brown to olive or dark gray, together with yellow spots or blotches on the head. These markings are clearest in juveniles and adult males and often fade considerably in mature females. A single small chin barbel is a useful supporting feature, though it is unlikely to be visible from a ship. Females are larger than males, and distant individuals can be difficult to distinguish confidently from other Amazonian river turtles.