Experts estimate the breeding population of the ruby-throated hummingbird is roughly 20 million birds. It is interesting to note that at least 16.8 million of these birds spend a portion of the year in the United States. The population of rubythroats that nest in the Southeast increased one percent per year from 1966-2005.  Currently the ruby-throated hummingbird population in Georgia is considered to be stable. This is great news for the millions of folks that enjoy watching these amazing birds.