I put my flytraps outside for a second day of "hunting," and they caught nothing. Not enough bugs around yet, I suppose.
However, after two days outside the traps are twice as red as they have been, and I take this to be a good sign. New leaves are coming up faster. Deterioration of "iffy" leaves accelerated too; these went from a greenish brown to black and withered.
So while I was getting growth before, it appears that conditions could have been even better for them. I think I will have to get them a plant light to supplement the windowsill sunlight on those days that I do not move them outside. Has anyone else tried this? Is it important that I time the plant light to correspond to the actual length of the day? Any fear of knocking them into dormancy if I leave the light on too long, or forget to turn it on?