The lesson ties into the concepts of survival and extinction of multicellular organisms from the previous lessons. R: Students rethink how organisms respond to the environment as they design an experiment on one of the pond water microorganisms from the previous lesson. E: Students express their understanding on the worksheet, in class discussion, and in groups as they work to design an experiment.
Itâs too late to attract a western hummer this winter, but perhaps youâd like to try next fall. According to Weidensaul, in addition to keeping hummingbird feeders up well into autumn, many successful hummingbird hosts have late-blooming fall plants.
1 Migration: Learning when hummingbirds migrate is a great way to decide when to put out hummingbird feeders. 2  If the birds are on the move, they will need good nectar sources for refueling and will readily visit clean, fresh feeders. February / March: Hummingbird migration begins early in the southern United States, and areas in the deep south can put out hummingbird feeders as soon as mid-to late February or very early March and expect to be visited by the first arriving migrants.