One of the flowers that attract both humming birds and butterflies is Buddleia, the butterfly bush. I planted fifty feet of them along the fence and they with a small place need pruning every year. there are many varieties, some more hardy than others.
The bright flowers grow in spikes and bloom for most of the late spring through summer into early autumn. I have a constant cloud of Monarchs, Viceroys and Fritillaries. Intermixed are humming birds, a couple of pairs that nest near by. I searched for the nest to make photos; so far no luck. These nests are on a tree limb and are tiny.
The butterfly flower is pretty and the design makes it attractive to both bird and butterfly.
My garden, Inman, South Carolina 08/28/2016