birds exc. ymness, chickadees bush tits and Steller jay. Mar. 30. Cold in early morning. Warm in middle of day. Saw Brewer Blackt. Cliff Swallows (under eaves of barn next wood yard. Watched Water Angel building from 10:45-11:05. Came 8 times with material most of which she placed high at the back. One long rootlet in bottom at center. Heard male sing full song once, and a snatch once. Mar. 31. Colder. Water Angel still working at nest. Perhaps half finished. Always comes with building material to log at foot of big boulder opposite nest, waits a moment, then flies across to nest. Saw her swim again. Rattle like diminutive kingfisher's rattle - shorter, not as loud. Given by both male and female. Male uses it as preface to song. Male does not seem to help build nest but stands on guard or nearby. Took afternoon train & Boulder. Seen a wounded Varied Thrush just