Anyone have a list of good causes to donate to or volunteer with?
Donation is all well and good, but there's a much easier thing you can do that will have a (potentially) much bigger impact:
plant insect-friendly flowers.
If you've got a garden, great. That's loads of space, and even if you only dedicate one strip of land to widlflowers and bee-friendly plants (like lavender) you're doing good work. If you don't have a garden because you live in a flat, windowsill planters that hang out your window are incredibly easy and cheap to procure. If you've got a lawn, another great tip is to mow less often. Insect abundance is significantly higher in longer grasses, and by long I don't even mean "don't mow for months", I mean maybe mow once or twice a month instead of weekly. The longer you can leave it the better of course, but even an extra week of growth helps substantially. And now you've got a great excuse for not mowing the lawn
If you've got a BIG garden then first of all, I'm jealous. But mostly, consider creating log and wood piles in less used corners. Literally just a pile of logs and dead wood. Amazing for insects, but also for small mammals and reptiles. Bug hotels are also great to hang on walls, but the wildflowers and longer lawns are more important. Bug hotels won't help much if there's no habitat around to support them.
And finally, if you can get any of the above done, and your neighbours show interest in what you're up to, spread the word. Because I swear to god if we all just considered the environment and what USED to be on our land before we concreted over it and built our own brick homes... If we all dedicated a section of our garden to being wildlife friendly like this then we wouldn't have these issues. Not on this scale at least. I could keep rambling about how you should replace concrete-based garden fences with hedgerows too, but I'll leave it here =P