TexbirdersAnother consideration with the sighting of rare birds is abundance. How do we know the individual observed is the ONLY member of the species in the area? We base presence by being observed in public areas or private areas that are visited by birders. How many acres in Texas are not being visited by a bird watcher? So when we say we are amazed that the Tropical Mockingbird was observed st Sabine Woods one has to wonder how many more are their between that point and Veracruz, Mexico (612 miles south of Brownsville) where they occur naturally? As for distance it would take a birder in Brownsville, Texas only 12 driving hours to see them in the wild. They are listed on the Wings Tour list for Veracruz as well as the Veracruz Bird Guide by Robert Straub. For a bird, even a mockingbird, this is not a great distance. Just another thought to ponder. Jack C. EitniearSan Antonio, TX