Phrynops hilarii (Hilaire’s Side-necked Turtle)
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Phrynops hilarii, also known as Hilaire’s Side-necked Turtle, is a freshwater turtle native to parts of South America. It is known for its sideways-tucking neck and wide head, giving it a distinct look compared to other turtles. This species spends much of its time in slow-moving rivers and streams.
Native To These Regions
Argentina, Brazil, UruguayNative Turtle Species Map – Find Turtles by Region
Scientific Classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Family: Chelidae
Genus: Phrynops
Species: Phrynops hilarii
Common Names
Hilaire’s Side-necked Turtle
Hilaire’s Toadhead Turtle
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Identification
Description
Phrynops hilarii has a broad, flat head with a gray to olive carapace that can grow up to 40 cm long. Its neck is long and bends sideways under the shell rather than pulling straight back. The plastron is light-colored and often features dark blotches.
Sexual Dimorphism
Females are usually larger than males. Males tend to have longer, thicker tails and slightly more curved claws.
Check more turtles from the Phrynops genus
Native Origin and Distribution
Geographical Range
It is found in southeastern South America, mainly in Argentina, southern Brazil, Uruguay, and Paraguay.
Preferred Habitat
This species prefers slow-moving freshwater habitats like rivers, marshes, lagoons, and ponds with muddy bottoms and plenty of aquatic vegetation. It is also tolerant of human-altered environments such as rice paddies.
Behavior
Feeding Habits
Hilaire’s Side-necked Turtle is omnivorous. It feeds on fish, insects, amphibians, crustaceans, and aquatic plants. It actively forages during the day.
Predators
Eggs and hatchlings are eaten by birds, raccoons, and larger fish. Adults have few natural predators due to their size and hard shell.
Reproduction
Breeding Season
Breeding generally takes place in spring and early summer.
Reproductive Method
The female lays several clutches per season, each with 9–14 eggs. She buries the eggs in sandy or muddy areas near the water. Hatchlings emerge after about 4–6 months depending on temperature.
Conservation
Extinction Status
Least Concern (IUCN Red List)
Threats
Habitat destruction, pollution, road mortality, and illegal pet trade in some areas.
Conservation Measures
Protected in several regions. Awareness campaigns and local wildlife regulations help reduce illegal capture and habitat loss.
Economic Importance
It is sometimes kept as a pet, though not commonly outside its native range. It also plays a role in controlling aquatic pests and cleaning up decaying matter in the water.
Interesting Facts
This turtle can stretch its neck sideways all the way to the edge of its shell to hide from threats. It can stay underwater for long periods and is often seen basking on logs or banks. Its unique side-neck motion helps set it apart from many other freshwater turtles.
About Author
Muntaseer Rahman started keeping pet turtles back in 2013. He also owns the largest Turtle & Tortoise Facebook community in Bangladesh. These days he is mostly active on Facebook.
