Delivering a blend of local history, environmental issues, education, entertainment, and fresh air, Davenport's River Action will again present a series of outdoor presentations in the first month-plus of the annual Channel Cat Talks and Riverine Walks: weekly programs that, from May 27 through June 28, will address such topics as Brazil's Amazon River, invasive species, area raptors, and the home of the Quad City River Bandits.