Brothers Ranch lies west of Pearsall in Frio County, Texas
(50 miles south of San Antonio), where the Frio River winds through
thousands of acres of pristine gallery forest.
Bronzed River Cruiser Macromia
annulata and Swift River Cruiser Macromia
illinoisensis georgina can be found flying at the same time, and here is a valuable direct comparison of the two taxa from June 12, 2005: