Hummingbird Moth

There are several hummingbirds that regularly visit the flowering plants and our feeder. Then there is this guy, Hemaris diffinis, which as far as we can tell (not being lepidopterists), goes by a number of common names including snowberry clearwing, or more generically, hummingbird moth, bumblebee moth, hawk moth, sphinx moth (family Sphingidae), etc. Although somewhat smaller, they do resemble the hummingbirds by their movements, their ability to hover and that they are always beating their wings, even when feeding. Their long proboscis can be easily seen in these two images, extended into the flowers of the butterfly-bush (Buddleja davidii).