Selasphorus rufus March 25 Queens Rd., Berkeley, Calif. perches usually used by the Rufus. These other species were Warblers, Song Sparrows, and House Finches. In all cases when the display was witnessed in toto, it ended with the R rising up into the air and concluding the display with tail actions. It is a puzzling thing that this R performed this display so much more frequently than the normal aerial display of the species. There seemed to be a difference between the situation here and others where a Rufus was established temporarily and performed the full, unconfined aerial display.