I led the field trip for my Warblers and Flycatchers class Saturday morning. We walked around Mt. Tabor Park in SE Portland for several hours. Spring migration tends to occur in waves, with some days producing large numbers of migrants, and other days producing very few. Unfortunately for the class, Saturday was one of the “very few” days. But despite the total lack of flycatchers and the near absence of warblers, we still enjoyed whatever birds we came across.