Pearson - 1997 18 some big trees and a few clumps of bamboo. Some of the canes are enormous, but some clumps seem to be only 5 to 10 years old. Also Berberis, fuchsia, radal, and arrayanes along the river. Gustavo has been here 1 1/2 years, says there is little bamboo here because of grazing, whereas no grazing across the lake. Anita and I put out about 90 traps at 5 p.m., covering pretty much all habitats. Cloudy, not cold. 1 December.- Wee drizzle off and on all night and morning. Picked up traps at 7 a.m. Anita's line almost 80%, mine less. Totals: 22 MS = 6 Oligos, 8 Abroi longi, 4 Abro oliv. Shermans: 24 Oligos, 12 Abro longi, 16 Abro oliv. Total catch: Oligo 30, longi 13, oliv 20, or 63 mice in 94 traps = 66% trap success for all mice, or 32% for Oligos. Talked with the parkguard at the Seccional Lago Rivadavia. He had only been there for 6 months but said that the mice had been especially abundant in March and in September-October. He had a boat and a nice little beach but had never seen dead mice washed up on the beaches. His cat keeps bringing them in. Most impressive is the amount of rosa mosqueta in Parque Alerces. From the Park Headquarters along the east side of the lake to Cholila and beyond the road is lined with rosa. Pastures are being invaded. It is not blooming yet; a few plants carry dried fruits. Trapping was good near the rosa bushes. The rosa in El Hoyo and El Bolson is blooming. Many many t ero-teros along the road near Cholila. Stopped in steppe habitat north of Cholila to dissect mice, then to El Bolson for snacks, home to Bariloche at 8 p.m. Drizzle off and on most of the way. See notes for November 7, 1991, for previous trapping along Lago Verde. 2 December.- Bariloche. Cold, not raining. Dissected mice in the morning and tried to get new license plates for the car. Note that for the 63 mice from Rio Arrayanes, not one pregnancy. One Sherman held 2 Oligos (their identities were lost), and another Sherman held THREE Abro olivaceus. (nos. 8534-8536: an old but non-breeding male, a possibly parous female, and an immature female).