FIELD NOTES   Arctic terns, mew gulls, and trumpeter swans flock to this shallow lake in May and June to nest and feed on schooling fish. In September and October, watch for groups of 10–20 trumpeter swans gathering on open waters. Black bears forage for grass and berries in mountain meadows overlooking the valley. Dall sheep and mountain goats roam mountain slopes, especially along the green-up edges. Moose forage in the marsh early and late in the day. Dusk will bring out beavers and muskrat. Although terns and many other nesting birds leave by late July, that’s when sockeye salmon begin arriving in force to spawn. Look for salmon along Daves Creek—off the picnic area at the western shore of the lake or take a canoe to the feeder creek to the east. Bald eagles perch on trees overlooking the lake. Forest songbirds forage in the trees along an old campground access road on the lake’s southwestern shore (the campground is no longer open).