This is just so adorable, and I see something new every time I look at it! From Chasing the Crayon on Etsy. How great a shop name is that??
Bird Portraits. Combine nature study and art. Study varieties of birds in the local area. Each student might focus on one type of bird, research its habitat, observe its features, & produce a portrait. Turn students into mini-Audubons! Love it :-D