K Dixon 1949 Calyptra anna 2. Mch 6. Univ. Calif. Campus, Berkeley, Alameda Co., Calif. any evidence of disturbance on the part I are bird when the other flew in to its perch, although neither bird sang from the perch in the presence of the other. As far as M. Williamson and I could determine there was no exchange of perches although two perches were occupied by the bird which occupied the lower part of the tree. Mch 13. 10:25 AM clear calm. One ♂ Anna Hummer occupied perch in top of pine. Hummer took one short circling flight and returned, then flew to telephone wires 30 yards away and sang when Scrub Jay flew into pine to perch. Second ♂ not in evidence. Aug 20. Oakland, Alameda Co., Calif. Noted ♂ Anna Hummer which sings frequently from wires in our back yard (314 Atlantic Ave) chase another hummer of undetermined she or sex. Pursuit took place around a live oak tree twice; shortly afterward the ♂ returned to perch on the wire, singing (bzee bzee of alternating inflection)