More bees. Here’s some carpenter bees big and small. Both kinds tunnel their nests into wood, but they’re two separate families.
The last few years in the spring, a big fat male carpenter bee patrols the yard. He can be pretty intimidating, flying by, but he can’t sting you. Aside from the pure bluster, you can identify the males by the white patch on their face. And they’re not bumblebees, bumblebees are fuzzy.
The small carpenter bees are so small they look like tiny little flying black ants. Only up close you can see their actual greenish color.