My Ruby-throated Hummingbird on its perch looks a lot like my Broad-tailed Hummingbird from the Rocky Mountains.  But looks can be deceiving.  According to the DNA, the Ruby-throat's closest relative is the Black-chinned Hummingbird of Texas and the Southwest.  This bird was defending a feeder in mid-August at Olen Thomas' house here in Stillwater.  At that time Ruby-throats are avidly feeding on sugar water and nectar in preparation for their migration back to Central and South America.