Make Way for the Annual Turtle Parade!
May 28, 2010
Press Story submitted by the Mississippi Valley Field Naturalists
By Dr. Paul Keddy*
*This article on turtle nesting season was prepared by Dr. Paul Keddy on behalf of the Mississippi Valley Field Naturalists. Dr. Keddy, is a local Lanark County resident, and scientist and author of many articles and books on wetlands and wildlife including Earth, Water, Fire: An Ecological Profile of Lanark County and can be reached at drpaulkeddy@gmail.com.
Turtle time is here again! In March we celebrated maple syrup season across Lanark County and through April and May we welcomed an early spring. But now that it is June, without much fanfare, we in Lanark County are being treated to the 200 million year old annual parade of turtles. Yes, June is here again and the nesting turtles are back! In fact this year they have been noticed on our roads for a few weeks now.
As I mentioned last year, most of the time turtles are rather secretive – hibernating much of the year on the bottom of lakes and ponds. Much of the rest of the year they swim around looking for dead things to eat and occasionally take a break to warm up in the sun stretched out on a log. Overall, turtles are harmless, and in fact do some good since they are efficient scavengers that clean up dead animals from our water supply. All of our turtles – even the large snapping turtle – are opportunist feeders. They eat whatever they can conveniently find, which is mainly insects and dead fish. Biologists have spent many years studying turtle diets –by counting the items in their stomachs – and have this well-documented. Even large snapping turtles, which get blamed for eating ducks or game fish, rarely have any of these items in their stomachs. They too eat carrion. Yes, snapping turtles will snap at you — when on land — particularly if you let your dog frighten them, or if you poke them with a stick. Many people would do the same.
Every part of the world has its own set of turtles. If you were lost, and someone gave you a list of local turtles, you could pin down almost exactly where you were. North America has just over 50 species in all. Some places, like the west coast, are impoverished, having just one species. Other places, like Louisiana, are blessed with more than 30 species. Lanark County has exactly five. In approximate order of size, beginning with the smallest, they are musk turtle (or stinkpot), painted turtle, map turtle, Blanding’s turtle and snapping turtle. All but the painted turtle are now considered species at risk. Two, the musk turtle and the Blanding’s turtle, are officially considered threatened species. The decline has two main causes, (1) death on roads and (2) destruction of wild places.
Nesting time is a dangerous time
For nearly 50 weeks of the year turtles are rather quiet, inoffensive neighbours, who pretty much keep to themselves. In this way, they might set a good example for human neighbors… but finally, after 50 weeks of peace, all hell breaks loose in June! All the females of reproductive age climb out of the water and begin the laborious task of hiking around to find a nesting site. It is probably terrifying for them to leave the familiar water and venture onto land, but the nesting urge is too strong to resist. Once they find just the right location, they dig a hole, bury their eggs, and leave. That is the end of motherly care. The eggs are heated by the summer sun, and then, in September, baby turtles about the size of a half-walnut dig their way up to the surface and somehow find their way back to water.
This means that without fail, usually near the middle of each June (and even earlier this year), we are treated to a parade of female turtles, wandering around our roads and properties, trying to nest. They have been doing this for about 200 million years, more or less. Turtles existed before the dinosaurs, and they even survived whatever it was that eliminated the dinosaurs. Despite their long history, turtles just have not had time to learn to adapt to two new things: cars and roads. That tiny brain has no idea that a road means danger. And so, increasingly, we are losing our turtles as the reproductive females (and often the eggs they contain) are killed on highways.
Biologists sometimes analyze the “reproductive value” of certain individuals in a population, i.e. how important they are to their species survival. New baby turtles have low reproductive value because only a few ever survive –skunks, raccoons, crows, fish and even bullfrogs eat them. This high mortality rate for babies is natural for turtles. However the reproductive value of the adult female turtle is extremely high. Once she has made it to 20 years old she has the capacity to make up for the high mortality rate of the babies by laying from 10 to 30 eggs every year for decades. The turtles being killed on our roads are usually the adult females — with the highest reproductive value. When a female is killed – it means the loss of hundreds of offspring she might have produced over future summers. These loses cannot be replaced. As a result, turtles that were present in my childhood, like musk turtles and Blanding’s turtles, are now uncommon. Not only do turtles just cross roads, they are actually attracted to roads. The warm sand and gravel along the road side makes a perfect nest site. So turtles will come long distances to climb onto the shoulder and lay their eggs. If drivers are careless, the highway becomes a ribbon of death.
So what can we do?
1. The first is to accept and even appreciate this annual event. We might even build an annual tourist event around the nesting weeks. We could put up some highway crossing signs at critical locations, or better still, plan ahead and build small underpasses when roads are being reconstructed. And, of course, we have to protect critical nesting areas from subdivisions. More urgently there is the immediate issue of death on the roads.
2. Drive carefully. Turtles are slow-movers, so as I mentioned last year, it really does take a complete idiot to hit one with a car.
- Don’t tailgate (which your driver training instructor no doubt told you anyway), as you may run over a turtle that the car in front of you just missed.
-Help them out. Stop, and carry the turtle the rest of the way across the road – in the direction she was headed, of course. Some will not appreciate your help, and may without warning try to scratch or bite, so keep a pair of gardening gloves handy and perhaps a shovel to help lift. A big snapping turtle is heavy, so I would recommend extreme care – probably best to simply act like a shepherd.
- Alert other drivers where possible. You could stop your car and let other people know that a turtle is crossing the road. Although this is not a good idea in traffic going 100 kilometers per hour, it would be feasible on many side roads.
-Let them nest in peace. If a nesting female arrives in your yard, keep the pets away, and let the children watch quietly from a respectful distance more than ten feet away. Think about the respect we give to pregnant women, and give the pregnant turtle the same courtesy. If she does nest, you can put a piece of chicken wire over the nest. Do not use mosquito netting as the holes are too small and could trap the baby turtles. Then, wait. Given the right amount of sun and rain, baby turtles should emerge in September.
One of the joys of living here is the annual spectacle of the June turtles. If you still think you must drive so fast that you ignore the crossing turtles, may I respectfully suggest you consider moving to downtown Phoenix or Las Vegas or Toronto, or one of our other larger urban centers, where you won’t have to be inconvenienced by other living creatures. Learning to share the landscape with wild animals is part of what it means to live here. We might start with courtesy to turtles, and then extend it to frogs, birds, butterflies, bears and all the other animals that lived here long before our ancestors decided to settle in North America.
Not everyone can personally save a blue whale, or a black rhinoceros, but everyone can drive responsibly, and, like a good boy scout, help the occasional turtle across the road. In 2009 many turtles were saved according to the Toronto Zoo turtle tally. To find out more about Ontario’s turtles and the 5 in Lanark County, visit a local bookshop or consult the Toronto zoo’s adopt- a- pond website www.torontozoo.com/adoptapond/turtles.asp or, if you would like to have an urgent turtle question answered you can e-mail the Toronto Zoo at aap@torontozoo.ca.
Filed under: Conservation, Education, Home by Pauline Donaldson June 1st, 2010
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