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.
There is a long-standing myth that leaving your hummingbird feeder out will prevent hummingbirds from migrating. This is not true. Migration in hummingbirds is controlled by hormonal changes. These hormones are triggered by changes in the length of daylight, not by food availability. Hummingbird feeders can help late-arriving birds at a time when natural food sources are not plentiful. Late arrivals that have access to a hummingbird feeder can fuel up quicker and be able to continue their journey south. Hummingbird feeders should be left out as long as you have hummingbirds feeding from them.