Phenology is defined as the study of periodic plant and animal life cycle events and how these are influenced by seasonal and interannual variations in climate, as well as habitat factors. You guys begged for this one so I can't wait to see how you use it! If the concept of this journal is new to you, check the hashtag #phenologywheel on social media for ideas! Printed on 88# watercolor paper, there are a total of 13 phenology wheels in this journal (13 months) with each wheel having 30 days. The insert is a standard A-5 size, 8.25" x 5.5"