I just received a notice from Horticulture about a great sale on daylilies. Being bee-focused, I did a quick search on whether daylilies would make good pollen or nectar sources. Right off the bat, I was thinking "no" because the deep trumpet is not an ideal landing pad for a honey bee, but this essay, "Pollination Adaptation" made me think again. I especially appreciated the explanation of the bulls-eye pattern as it appears in ultraviolet light, showing that the honey bee can "see" the flower as a food source even when to our eyes, the flower is colored red which honey bees cannot see.
A scholarly article in the journal PLoS One found carpenter bees to be among the 930 pollinators that visited daylily hybrids during the day; we have native carpenter bees, so it's possible these flowers may provide a food source for honey bees. They most definitely are attractive to Swallowtail Butterflies, which I find just as appealing as a gardener, especially since they are a native pollinator. The daylilies would add summer interest to the blueberry patch, too, along with the gaillardias.