Winter is unusually mild and it already feels like spring. Apparently the Canada Geese think that as well. I have heard several flocks fly over, towards the North.
When you talk about bird migrations with your students, making a Canada Goose with paper plates can be a very exciting project, especially for grades 4 to 6. I have found that by integrating science with visual arts, you can reach more students, because kids often have very different learning styles.
For this project you can ask the students to observe pictures and create their own representation. To get you started, see the Animaplates Canada Goose project.