"The advent of spring is usually announced during the first week of March, sometimes by the robins, sometimes by the bluebirds. The latter, it should be remarked, are an exception to the rule that our spring and autumn callers arrive and depart in the night. My impression is that their migrations are ordinarily accomplished by daylight. At all events I have often seen them enter the Common, alight for a few minutes, and then start off again; while I have never known them to settle down for a visit of two or three days, in the manner of most other species....."
--Bradford Torrey
