Journal July 1 Garfield Pk & Dyar Rock, Crater Lake Nat. Park Arrived at Garfield Pk at: 7:30AM. Clear, warm. Hiked to Applegate Pk. Spent one hour at Dyar Rock. Climbed down snow from rim west of Dyar Rock to base of second set of ciffs below Dyar Rock. [diagram] to get a better look at snow margins & snow fields in this area & to listen & watch the cliffs for Rosy Finches. Returned to Rim Village at 12 noon. Results: No Rosy Finches anywhere. Since this is where I had previously found the greatest concentrations of finches on June 25-28. Only one rosy finch has been seen since then (one on Uao Rock) & none at Dyar Rock on June 30 & July 1. The sudden disappearance correlates with a sudden change in ambient temps. and suggests that perhaps the finches leave areas of nesting (permanently?) if these areas become too hot, even after nesting has started (one f collected had an egg nearly ready to lay). If they leave for cooler mtns, the closest possibility to the north is Mt. Thielsong 9182) & Mt. Bailey (8363ft) 12 miles north of the north rim and to the south is Mt. McLoughlin (9495ft.) 30 miles south. Union Pk(7699ft) within the park also looks possible (cliffs, snow, etc) but is rather low.