The bees are showing up here even though there is nothing for them to do yet.
Glad you have some! Our lilacs are in full bloom and nary a one. There are none of the other buzzing things either, so I really suspect this is just overkill caused by our our current pesticides. You recall 10-15 years ago when tracheal mites were the apparent cause of the die-off of most of the wild hives. At the time, the well-cared for commercial hives were thought to be the refugium. Meanwhile, to return to my hypothesis, driving as many miles as I do at night, and remembering the old days when you’d have to literally scrape your windshield, there ain’t no such bug population no more. only the mosquitoes have survived.