KDixon 1951 Parrus atricristatus Feb 28. Santa Ana Wildlife Refuge, heard & mouse calls from ebonice wood of house (as I was preparing evening meal). The birds moved to Tree "A" when I heard a rapidly uttered series of soft sit- sit-sit notes. This was at 5:43. I believe that the birds moved along the row of small trees toward the telephone pole. By 5:45 they were silent and I did not locate them nor hear them again although the sounds did not set until about 6:24. Last night one of the birds [illegible] roosted in Tree "A" and apparently expected that his mate roosted near the telephone pole. Either "she" (?) had gotten off and if the roost earlier than "he" awakened or "she" had actually roosted in Tree "C" of the map. Several impressions of the birds here. They seem to be paired but not advanced very far toward nesting. I have not seen any clear cut nest-site prospecting nor courtship feeding nor begging unless the notes before roosting tonight represent this. The birds here resemble P. inornatus in apparent size more than did the Chisos Mts. birds. I do not know whether boundaries have crystallized yet but disputes do not appear to be the "do or die" affairs that characterize P. inornatus; either these matters have already been settled and the vocalization is mere reminder or the birds will work themselves into a higher pitch of excitement later in the season.