I do believe the leafcutter bees are active. When I leaned closer to admire all the blueberry blossoms, I spotted this precise little circle cut. It’s a good sign for blueberries, as leafcutter bees are good berry pollinators. And I saw similar signs last year, but I haven’t quite spotted the bees themselves yet.
Like the miner bees, leafcutters are solitary bees, except they nest in stems and soft wood. They take circles of leaves and curl them up as a lining to keep the nest dry. Then they collect balls of pollen and lay their eggs. Repeat.
They’re out there somewhere.