Alder Creek runs along the back of our property here, for about 60m (200′). The creek is in a small valley, perhaps 6m (20′) deep with a fairly steep embankment.
Over the past week, we’ve had (at least) three snapping turtles make (at least) four attempts at making nests in our yard, with (at least) two nests successfully laid.
That morning I found this turtle trying to leave our vegetable garden but foiled by the chicken-wire fencing (whose bottom edge is buried). It seems she got into the garden by pushing her way under the gate, but was unsuccessful at digging a hole for her nest.
I moved her from the garden onto the grass using a square-nose shovel. It was hot and sunny so I gave her a rinse with the hose to cool her off a bit, and also to better see her markings.
Her shell was about 35cm (14″) long and 25cm (10″) wide. The lack of any substantial digging, as well as that bulging butt of hers, suggested to me that she had not laid any eggs.
The very next evening, while heading out to a soccer practice for Lily, we found a different turtle, about the same size as the first, digging a nest at the edge of the driveway under some chain-link fencing.
When we returned later in the evening, this turtle was gone and the hole was filled in, but turtle number 1 was back digging along the edge of the garden, near the other gate (no pictures, though).
That morning, I found yet a third turtle digging a nest near the garden gate that turtle number 1 had snuck under. This turtle was smaller, her shell perhaps 30cm (12″) by 20cm (8″), and she had no battle scars.
That evening, I checked the places where these turtles had been digging. I dug around by hand a bit but didn’t really find any disturbed soil except right at the surface, so I figured there were no nests.
I thought they might be finding the soil hard to dig, even though it has a sandy consistency, so I started to loosen the soil with a spade. Unfortunately I found right away that there was a nest there, damaging a few eggs with the spade in the process. I dug away the loosened earth by hand and found intact eggs.
I replaced the intact eggs against the undisturbed ones, covered the area with soil again and packed it down. I discarded any damaged eggs some distance away to avoid attracting critters that might dig up the nest.
It turns out that the turtles don’t dig straight down. Instead, as the hole deepens and their body tips into the hole, their rear legs tend to dig more horizontally under their body, so the egg chamber curves forward. This probably explains why hand digging did not at first find the nest.
With this in mind, in re-examined the other dug areas and found that turtle number 1 had indeed laid eggs on her second attempt. I hand-dug a bit, exposing the nest, cleaned up any damaged eggs (it seems the turtle can damage some when covering up the hole), and closed up the nest again.
I also re-checked turtle number 2’s area but didn’t find a nest; either I just missed digging it up or she gave up there and later made a nest elsewhere.
Now I have a long wait. Various articles suggest the eggs won’t hatch until at least late August, and maybe as late as the end of September. I think it might be prudent to cover these two nests with some chicken wire to discourage the local raccoons from digging up the eggs. Since both nests are in front of vegetable garden gates, this might also remind me not to step on the nests too much!
She might have been run over by a car. I encountered one on a highway and the vet and I spent a while crazy glueing it’s shell back together. I’ve seen signs for turtle crossing in the Gatineau and also read about under-road passageways that have been built in B.C.. If you have that many turtles, you might want to check if they are crossing a busy road to get to their traditional egg laying area (which appears to be your backyard- lucky you). You have a great opportunity to protect them and if more have cracked shells something might be able to be done to save them. They can get caught on lots of things with broken shells, they are more vulnerable to predators, infection, neurological damage and slow painful death.
Hope you post baby pics!!
I agree that the cracked shells are probably the result of close encounters of the automotive kind. I was wondering, though, if the round crater-like marks are old wounds from being bitten by some carnivore.
Last year I found a larger snapper trying to cross a road. Its shell had cracks that would snag in the cut tall grass at the roadside.