And every Blossom on the Bush Adjusts its tumbled Head (5-6)
Now we get the effect the hummingbird has on the natural world. The blossoms get personified. They seem almost as amazed and dazed as the speaker is. Far out, flowers.
The mail from Tunis, probably, An easy Morning's Ride (7-8)
Even though the hummingbird is found in America, it gets the exotic treatment here, as the speaker imagines it coming all the way from Africa. It's as though, in her state of awe, the speaker is trying to pick the most amazing location she can think of to describe how easily this little bird might make a trip. And carrying a mail bag to boot!