The BBS map shows relative abundances of this species in Texas average below 3 per route, although the Town Bluff route in Jasper County had the highest average for the survey at 20.5 Ruby-throats per year (Price et al.
The North American North American Breeding Bird Survey (BBS) map (Sauer et al. This area includes all of the Pineywoods, most of the Coastal Prairies, the eastern edge of the Post Oak Savannah and Blackland Prairie and fringes of the South Texas Brush Country and Coastal Sand Plain regions (see the region map in Lockwood and Freeman ). During the 1987-1992 field work seasons of the TBBA project, observers found almost all breeding sites for Ruby-throated Hummingbirds east of or just west of the 98 th meridian. Some individuals are known to fly nonstop over the Gulf of Mexico from the southeastern United States to Mexico and Central America, while others follow th Gulf Coast south to reach their wintering grounds (Robinson et al. The annual migration of Ruby-throated Hummingbirds needs much more study. The range of Buff-bellied Hummingbird overlaps that of Ruby-throated Hummingbird along the central and southern Texas coast. alexandri) between the 97 th and 98 th meridians (TBBA data) and in Comanche and Stephens counties in Oklahoma (Gerard 2004, Patti 2004). The range of this hummingbird overlaps in Texas with that of its western counterpart, the Black-chinned Hummingbird (A. Ruby-throated Hummingbirds are the only hummingbirds breeding regularly in eastern North America, outside Texas and Oklahoma.
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