For ten points, name these birds that feed on nectar and can hover by beating their wings extremely rapidly.
Some species of this bird go by the common name of "Awlbill" or "Violetear". The Buff-bellied species of this bird is founded in the Southeastern US, and every living species of this bird is found in the Americas. The eastern-most species of this bird is the Ruby-throated, which is the only one to nest east of the Mississippi and which migrates across the Gulf of Mexico in a single flight. This bird is sometimes mistaken for a European (*) hawk-moth that is named for this kind of bird. The "bee" variety of this bird is the smallest known bird in the world. These birds have among the fastest metabolism and highest heart-rate of any animal. For ten points, name these birds that feed on nectar and can hover by beating their wings extremely rapidly.
Some species of this bird go by the common name of "Awlbill" or "Violetear".
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