The buttonbushes’ nectar has attracted a hummingbird moth. This insect looks and behaves just like a hummingbird, hovering in front of flowers while it drinks nectar. Both the moths and the birds are endotherms, generating heat internally to power their active flight.
Snowberry clearwing (Hemaris diffinis). Another species that looks similar to this one is the Hummingbird clearwing (Hemaris thysbe), but the Snowberry clearwing has dark (not yellow or light) legs and a black line that runs from the eye down its side.