Pearson - 1997 Busch, and Bilenca. Much yak, coffee, lunch, then brought Bush and Bilenca back to the Bariloche airport. Apparently ultrasound machines had been used at the Arrayanes forest in anticipation of President Clinton's visit. The thought was that they had been effective (no data), and might even have driven the mice 13 km north to the town of Villa Angostura! More of the usual reports of Oligorysomys falling into tanks of water, etc. Gustavo had mice eating his corn plants as soon as they sprouted. Cloudy-drizzle at Villa Angostura, cool windy and clear at the Bariloche airport. Gustavo agreed with our other sources that chimangos were uncommonly scarce. Yesterday I put out a new max-min thermometer. The old one was unreliable because the maximum rider kept falling down onto the mercury column. Therefore, the max readings up to now have been wrong. 21 November- Yesterday afternoon was cool, windy, scattered clouds; typical Bariloche. Disturbing thought number 27: Our study of Reithrodon was carried out a few years ago at a time when Reithrodons were unusually abundant. For example, we caught as many as 23 in one night. We attributed this to our growing skill. However, is it not possible that we were seeing a Reithrodon ratada and that their docile, fearless behavior was analgous to the Oligoryzomys behavior observed by people during the post-bamboo ratadas? Went up to Ecotono and talked with Tom and Andrea Keithberger. He said it was a fairly good year for lenga seeds, especially in Tierra del Fuego, poor for coihue, and very good for nire seeding. To him, none of them seems to be nutritious for wildlife. He printed out for us the last 12 years of temperature and precipitation from INTA. At 6 p.m. put out traps beyond Lago Escondido, 5 km W Llao Llao Hotel. I put two lines: one along the margin of the road in dense rosa, second growth coihue, and bamboo, 5 MS, 5 new Argentine metal mousetraps, and 10 Shermans. A second line through fairly pure coihue/bamboo into Arrayanes and rosa as it approached Brazo Tristesse, 24 Shermans. Many dead rosa clumps that look choked out by bamboo.