Bird Song Expert  What do the songs of birds have to teach us about how we learn language? Today on Insight, you’ll meet UC Davis professor emeritus Peter Marler, whose groundbreaking work has helped researchers begin to answer the question. He was recently elected as a foreign member of the Royal Society in England for his work on communication in birds and primates.

Farm Sanctuary  Farm animal advocate Gene Baur has a new book, "Farm Sanctuary: Changing Hearts and Minds About Animals and Food." It chronicles his experience leading the farm animal protection movement.

Gene Baur speaks at 7 p.m. Friday, July 25th, at Time Tested Books, 1114 21st St., Sacramento. Information: (916) 447-5696.

Four Play - The Show B4 the Show  Sacramento's Fourth Stage is trying a new concept in theater. Actors will perform four short pieces, rotating a new 10-minute play into the show every week so that by the end of the month, the entire show will be different. They call it, "Four Play - The Show B4 the Show."

"Four Play: The Show B4 the Show" is performed at 7 p.m. Fridays and Saturdays at the William J. Geery Theatre, 2130 L St., Sacramento. Information: (916) 225-5181.