Turtles are remarkable and resilient creatures that inhabit our wonderous wetland worlds. They are widely celebrated in both popular culture and folklore as totems of balance, beauty and prosperity. In Aboriginal culture too, turtles are seen as symbols of longevity, endurance, and the continuation of life (especially in the face of great hardship and struggle).
We have much to learn from our endearing turtles. However, the avenues are limited as turtles are also inherently shy creatures. They seldom venture out, staying confined to the comfort of their wetland habitat and sanctuary for long stretches of time. And their rituals of mating, nesting, feeding and living, remain largely undocumented and mysterious.
Hidden in the grassy underbrush and marshy swamps, they thrive. Feeding on bugs, snails, worms, fish, crustaceans, plants and animals, scavenging and flourishing, they play a crucial role in the wetland ecosystem. They are vital indicators of wetland health. This is why their ever-dwindling numbers, impacted habitats and disrupted food-webs demand our most serious consideration.
Come, Meet Our Oblong Turtle
The oblong turtle or, the long-necked turtle, is a native species that is only found in this part of the world – in a small pocket at the southwestern tip of the state of Western Australia. And we are fortunate for their presence here!
The oblong turtles owe their name to the oblong shape of their carapace (upper shell) and snake-like long neck. Dark brown or muddy black in colour, these turtles are found in waterways across Perth and throughout the south-west. They occur in permanent and seasonal freshwater habitats, including rivers, swamps, lakes, damp lands, and natural as well as artificial wetlands.
Adult turtles can grow large and measure about 30-50cms from the tip of their tails to the end of their beaks. The young hatchlings are tiny as they begin their journey though, with a carapace merely the size of a 20-cent coin!
The Turtle Nesting Period is On!
September to January is a special season indeed. At this time of year, you can witness turtles leaving their watery homes in search of suitable nesting sites. They are known to travel up to a kilometre in search of the perfect site with soft sandy soils where they can lay their leathery eggs.
Unfortunately, a turtle out of water is a turtle at risk! Turtles get run-over by cars as they cross busy roads and pavements, oftentimes distracted by loud sounds and noise from moving traffic. Turtles are also exposed to birds and other predators that prey on them as they find their way. Dehydration and tiredness from the long journey and the added confusion of a changed or disturbed site can cause the turtle to feel lost and ultimately perish from fatigue.
If you are lucky to site a turtle that is on its way, help it cross the road by halting incoming traffic till it crosses. If this is too risky, you could lift it across the road (make sure that you take it in the direction it is headed and not back!) and ensure that there are no other threats around. If you have the time, you could also follow the turtle (at a safe distance) to and from the nesting site. Protecting our exposed and vulnerable turtles can go a long way in ensuring the survival of the species.
Threats to The Oblong Turtle
We lose a number of turtles to road accidents each year. In fact, in the period leading from September to January when turtles nest, and from June to July when hatchlings make their way back home to the wetlands, our turtles are at their most vulnerable.
Feral animals including birds of prey, cats, dogs and foxes are a significant threat to our oblong turtles. Feral animals are known to attack the turtles as well as their nests, feeding on eggs. Poaching and removing turtles from their wild habitat to keep as domestic pets is also a major threat. Although catching and keeping turtles as pets is illegal and punishable by law, it still happens.
And finally, it is the increasing urban sprawl, especially in the vicinity of the wetlands, that is leading to fewer and more disjointed habitats for our turtles. The compromised water quality and enhanced pollution levels are impacting their numbers, even as safe and suitable habitats become threateningly scarce.
Turtles on Your Property?
If your home happens to be popular with the turtles and you see a great number on your property, chances are that you are on a nesting site! Turtles are known to follow the same pattern year-on-year and are likely to end up in the same favourite spot for nesting. If you are a turtle buff, this can be an incredible opportunity for you to witness something magical!
Allow the turtle to nest and observe at a safe distance. Ensure that your pets are on a leash and away from the turtle. Make sure that there are no other threats that could harm the turtle. The female turtle will take anywhere between 15-30 mins to lay her leathery eggs, using her plastron (lower shell) and legs to dig and later cover-up the hole.
The turtle will be tired from her strenuous journey and vigorous nesting activity. If you find her at risk, you could help her get back to the wetlands safely, but not unless you are sure that’s the direction she is headed in. Keep the nest undisturbed while the mum is away. Turtle hatchlings will emerge after a period of incubation, and you can help them get back to the water too.
Here are some handy instructions if you are required to move a nesting site or handle a turtle anytime. Please remember that our turtles are wild creatures, and it is not encouraged to interfere with their movement unless they are at risk. That is please do not pick up hatchlings or adults unless absolutely necessary!
Handling a Turtle: When handling a turtle prepare for them to resist and squirm strongly. They do not bite; however, they are known to scratch and struggle. Take care to keep a strong hold and not to drop them when this happens. Wrapping a small damp towel around the turtle can help you get a good grip. Always use both your hands and keep the turtle away from your own body.
Moving a Nest: If you are required to move a nest for any reason, or if you come across a compromised nest and want to help relocate it, here is what you do: Make sure you dig around with gentle hands and get all the eggs in the nest. Mark the position the eggs were in exactly and ensure you put them into the relocated site as they were found. The fresh hole you dig should be at the same depth and with similar conditions of dampness or dryness. Remember turtle eggs that are rotated will not hatch! If the temperatures are too cold too, the eggs won’t hatch!
Facts You May Not Know About Our Turtles
Here are some quick oblong turtle facts that may surprise and wow you!
- Freshwater turtles, such as our oblong turtles, can drop their body temperature, slow their pulse rate and use their stored body fat in place of fresh food to survive severe hot and dry conditions. This ability, known as aestivation, is the reason our hardy turtles can cope with the roughest Western Australian weather.
- Turtles are the only creatures with an exterior shell that is all bone and attached to their spine. The turtle shell is living material, much like our own fingernails. And they can sense pain, touch and temperature through it!
- It is a common misconception that our oblong turtles can protect themselves by retracting into their shells. Oblong turtles cannot retract into their shell!
- Our oblong turtles can live a long life of over 60 years when the conditions are right. They need to live long because they have very low recruitment rates (few surviving offsprings). In fact, on average only 1% of turtle eggs go on to hatch and survive until adulthood.
- Turtles are known to feed on the dead and decaying organic matter and debris. Turtles help keep the waterways clean and aid in wetland function.
Help Us Turtle Watch!
Sighting a turtle is a beautiful and moving experience! Be sure to share your lucky sighting at climatewatch.org.au. You can log your sighting using their app. Or call us at The Wetlands Centre Cockburn at our Turtle Watch Helpline.
Keeping a lookout on the migration patterns and movements of our native turtles helps us identify important habitats and nesting grounds. It also helps us create safer homes for these amazing wetland creatures!
1 comment on “A Wetland Habitat For Our Amazing Turtles”
I\’ve been doing some research for a brochure and found that what I had been calling the Oblong Turtle is more correctly called the Southwestern Snake-Necked Turtle. There was a scientific name change that has meant the common name \’oblong turtle\’ more accurately refers to a northern subspecies (Chelodina oblonga) rather than the one we have down here (Chelodina colliei). I thought it was quite interesting, also a bit more of a mouthful to say unfortunately!
When I first started the research it was difficult to figure out, as there is such a mixture of names used, and little information on the changes. There seem to be three common names for the southwestern turtle from SW snake-necked turtle, SW long-necked turtle, narrow-breasted snake-necked turtle.
From a review of a turtle book –
“When the species’ name was changing in recent years we indicated to local turtle biologist Gerald Kuchling that we thought ‘Oblong’ could be replaced by ‘South-western Long-necked’ and the northern species Chelodina oblonga could then be referred to as the Oblong Turtle.”
“As such the correct name for the Northern snake-necked turtle is Chelodina oblonga and for the South-western snake-necked turtle is Chelodina colliei. This has required considerable effort over the ensuing 12 months to establish this correct nomenclature. As part of this it is now seen as less than desirable to continue using the name Oblong Turtle for the South-western snake-necked turtle, since it is based on the scientific name of another species.”
I then did a google search of the different common names to see which one I should use/was most popular.
Southwestern long necked turtle – 135 results
Southwestern snake-necked turtle – 1700 results
Narrow-breasted snake-necked turtle – 3000 results (but was also used to refer to the northern species)
Based on these results I figured the Southwestern snake-necked turtle was the most appropriate.
I thought you might be interested in my findings 🙂
Thanks for the interesting blog!