At the height of summer, the flowers are much loved by nectar seeking insects. In this post, I am showing a few of the ones I have noticed. Large bees such as this Carpenter Bee (Xylocopa virginica) or bumblebees might be the most obvious.
Smaller bees like this one, which appears to be a sweat bee of some sort, are also abundant around the flowers.
I have also found larger sweat bees like this one, which appears to be an Agapostemon sp. These are easier to notice than the smaller sweat bees but harder to photograph because of a combination of their small size and wariness. You might notice that the flower looks worse for wear. I think the reason for that may be that Japanese beetles have eaten the petals.
Butterflies and moths also like coneflowers, as one might expect. Here is a Clouded Sulphur (Colias philodice) nectaring at one.