I think you will find it useful WBF. It mentions all the different kinds of bees, including honey bees, bumble bees and solitary bees, bee mimics, cuckoo bees, bee flies, etc. Having read about them, I suddenly see that we have lots of solitary bees here
It also de-scares wasps ie makes them more acceptable. So many folk are petrified of wasps, but they are a real help in the garden and in agriculture. Years ago I watched a yellow and black typical scary wasp working away in my allotment. It was searching in my lettuce patch in a very definite 'quartering' pattern, then it picked up a caterpillar and flew away with it back to its nest. Now that's useful. Wasps also pollinate flowers, and some types are parasitic on aphids and caterpillars.
Another point I picked up, which is obvious now it's been pointed out, is that bees don't just need flowers, for pollen and nectar, but they also need food plants for their larvae, so we need to factor that in in garden design.
I could go on and on about various things I've learnt from this site, but I'll let you have the fun of finding it all yourself.
Do let us know how your wildlife garden progresses.