Over here in Scotland where I live, Unfortunately most of the younger neighbours somewhat sanitise their gardens, which gets rid of bee's and wasps, By sanitising I mean monoblock pavings and ripping out flower beds etc, so unfortunately we do not have much feeding for these wee guys, Over the past years I had a small colony in the brick work at my back door , It was always nice to sit with a cup of coffee and watch these wild bees come and go, Unfortunately a couple of years back we had a prolonged rainy spell , followed by a long cold snap, and that wiped the colony out, When the spring came back round the hive never recovered
One vof my pals is a bee enthusiast and in his works yard he has about six hives , A year back some little vandals broke in and torched one of his works buildings, and with all the smoke and mess he thought that would be the end of his bee's, But No ! the following morning where the hives were concerned it was back to buisiness.
Long years back, when I lived in a fairly remote area, which was surrounded by trees, and deeper undergrowth at the bottom of my garden I had a large wasp colony, these guys can be big trouble, but strange to say the problem was minimal, and where the garden was concerned these wee guys, did not half snack out on greenfly and other pests, The down side was at the end of summer when they were tired and bad tempered , and if they came near the house a sting is not nice, to some folk's it can be fatal.