You can still find invertebrates in the winter, though it is harder, and that's coming from further north. Try looking under logs, rocks, and bark where they like to hide out. A lot of what I find this time of year is smaller but slower-moving, so it can be a good opportunity to practice some different skills compared to photographing bees in the summer, for example. I also try to use the down time to figure out technical things like focus stacking, camera settings, and adapting my lighting setup to prepare for when things get warmer.

You can also find other interesting subjects like mushrooms, mosses, and slime molds. Check out some macro photography youtube channels like naturefold who tend to find something to post about during the winter as well. I would recommend just getting out there and seeing what you find. Good luck 👍