#teenslib

Hi, @teenslib! You're going to have to knock back the grass first, and unfortunately your non-native flowers may be a casualty of that. Mowing the current lawn as short as you can and doing so repeatedly can kill a lot of them off, especially if you mow right before a really hot day. If you do this at least weekly between now and fall (or even more often if you have the time and energy), then in fall you could sow heavily with native wildflower seeds. It doesn't mean you won't have any grasses or other non-natives coming back, especially since there's probably a sizeable seed bank, but you'll at least be giving your natives a better foothold to start with. And in the spring you could add some native plant starts to take up even more space. Then re-seed with native wildflower seeds in fall again. Basically you want to fill in as much space with native plants to give the non-natives as little foothold as possible.

Beyond that, you'll have to do a lot of hand-weeding of what you don't want in there. Many of those non-native plants can be very persistent so it's going to be a marathon, not a sprint. And there aren't a lot of native plants that can compete with them without help from us (hence why invasive species have taken over so much land.)

If you have the option, covering over areas of land with cardboard or heavy black plastic can also kill off pretty much everything underneath. If you leave it for at least a year--I lay down cardboard in summer, and then don't uncover until the second fall afterward--that does a pretty effective job. You can sometimes get nice big cardboard boxes from appliance stores.

As far as I am aware (and a quick google search seems to support this perception, I was unable to find anything directly relating to this subject and what I did find was full of technical jargon), body size does reliably predict wingspan across the order Chiroptera.* There are some species where the females tend to have a larger body size* than the males, though.

*A fancy way of saying all bats physically look proportionally similar. *Possibly only in specific measurements, such as the length of forearm, versus in general, if I understood what I read correctly from the article linked below.