Eastern Long-necked Turtle

Eastern Long-necked Turtles are predominantly crepuscular, being most active during dawn and dusk. They spend much of their time submerged, surfacing intermittently to breathe by extending their long necks. When foraging, they employ a sit-and-wait strategy, remaining motionless before rapidly extending their neck to capture prey with a sideways sweep of the head. They are capable swimmers but often walk along the substrate in shallow water. During periods of drought or habitat desiccation, they undertake terrestrial migrations, sometimes traveling several kilometers to locate new water bodies. Social interactions are limited; individuals may display aggressive posturing or biting during encounters, particularly in confined spaces or during the breeding season. Basking behavior is observed, especially in cooler months, as they climb onto logs or banks to thermoregulate. In captivity and occasionally in the wild, they have been observed stacking atop one another while basking.

Breeding occurs primarily from September to January (spring to early summer in Australia). Males court females through tactile stimulation and head bobbing. After mating, females leave the water to nest, often traveling considerable distances to find suitable sandy or loamy soil. Clutch size ranges from 4 to 20 eggs, with larger females producing more eggs. Females may lay up to three clutches per season, spaced several weeks apart. Eggs are oval, leathery-shelled, and incubate for 100–150 days, with temperature influencing the duration. There is no parental care post-oviposition; hatchlings are fully independent upon emergence, typically after heavy rains. Sex determination is genetic (GSD), not temperature-dependent, which is unusual among turtles. Hatchlings measure about 2.5–3.5 cm in carapace length and are vulnerable to predation by birds, mammals, and fish.

Chelodina longicollis exhibits several notable adaptations. The elongated neck, supported by specialized cervical vertebrae, allows for rapid lateral strikes at prey and enables breathing at the surface with minimal exposure. The musk glands produce a foul-smelling secretion as a deterrent against predators. The species can tolerate brackish water and periods of low oxygen by reducing metabolic rate and utilizing cutaneous respiration. During droughts, individuals can aestivate by burrowing into mud and reducing activity until conditions improve. Their cryptic coloration provides camouflage among aquatic vegetation and detritus. The ability to travel overland between water bodies is a key adaptation to the variable Australian climate.

The Eastern Long-necked Turtle holds a modest place in Australian culture. It is occasionally featured in Indigenous Australian stories and artwork, symbolizing resilience and adaptability. In some Aboriginal traditions, turtles are associated with water spirits and are considered indicators of water health. The species is sometimes kept as a pet, and its distinctive appearance makes it a subject of interest for naturalists and educators. However, it is not widely used for food or traditional medicine. Conservation campaigns have used the turtle as a flagship species to promote wetland preservation.

Recent research has focused on the species’ movement ecology, revealing extensive terrestrial migrations and the importance of landscape connectivity for population persistence. Genetic studies have clarified the taxonomic relationships within the Chelodina genus, highlighting cryptic diversity and regional variation. Investigations into the effects of urbanization have documented increased road mortality and altered sex ratios in some populations. Studies on musk gland secretions have identified unique chemical compounds with potential antimicrobial properties. Ongoing research is examining the impacts of climate change on reproductive timing and hatchling survival, as well as the species’ role in aquatic ecosystem functioning as both predator and scavenger.

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The Eastern Long-necked Turtle is currently classified as Least Concern on the IUCN Red List.

While currently listed as Least Concern, Eastern Long-necked Turtles face several threats. Habitat loss and fragmentation due to urbanization, agriculture, and wetland drainage reduce available breeding and foraging sites. Road mortality is significant during overland migrations, particularly in peri-urban areas. Predation by introduced species such as foxes (Vulpes vulpes) and feral pigs (Sus scrofa) affects both eggs and adults. Water pollution, especially from agricultural runoff and urban waste, can degrade habitat quality and impact food availability. Climate change poses long-term risks through altered rainfall patterns and increased frequency of droughts. Despite these challenges, the species remains relatively abundant and adaptable, but localized declines have been reported in heavily modified landscapes.