Bzzz, bzzzz, it’s like a busy airport around the sunflowers. Bees of all kinds fly in all day. At times there are multiple incoming flights.
The bee below is a leafcutter bee. You can tell because it is carrying the pollen it collects on its abdomen, not its legs. Leafcutter bees are solitary bees. They build nests in old trees and logs, lining the nests with leaves. A European bee, people have distributed leafcutter bees all over the world because they are excellent pollinators.