It must be the season.
I opened my front door to find a large red-eared slider digging a whole 2 feet away, in the mulch under my sago palm.
She ignored me and continued her work until it was about a foot deep, then she dropped her eggs, filled it in and took off.
Unfortunately, the nearest body of water is a small subdivision lake we have a view of behind our house.
So, her internal compass told her to head that way - and she did - smack dab into our garage wall. She slid along it like a robot stuck in "go" until she got to the end of the wall, then proceeded forward til she smacked into the next wall.
Feeling sympathy for her, I finally intervened, picking her up and moving her to the back so she could get a straight shot.
I wonder if her babies, in a few months, are going to do the same thing - and head right for my front door since that's between the nest and the water.
I'd move the nest to the back, but I've read that moving turtle eggs is tough to do without killing them. Momma knows the best temp, depth, moisture, etc.
Anyways.. I was fascinated - wished I had a digital camera.
And it made me wonder how the babies will know which way the water is.
Did the mother somehow imprint them with her journey to the nest?
(and therefore, if you moved the nest, their imprinted directions would be off)
Or, do they have a built-in compass of some sort that automatically detects the nearest body of water - regardless of where the nest is?
Watching turtles on the beach, I used to think it had to do with the moonlight and sounds of surf. They detected this stuff and scooted towards the water. But these guys won't be able to see or hear or smell the water - it's not that close, and there are houses between them. And the biggest light they'll see is a lamp post one house away, in the opposite direction of the water.