2027 Phenology Calendar Explores Climate and Weather Impacts

The Aldo Leopold Foundation's fan-favorite Wisconsin phenology calendar is back for 2027! What is phenology? Only the most Leopoldian way to engage with the soils, waters, plants, and animals all around you. In his book, A Sand County Almanac, Aldo notes the arrival of geese in March, the blooming of silphium in July. Do you, too, notice the arrival of a favorite migratory bird, or the bloom of a particular wildflower? Phenology is the study of the timing of these seasonal events―and observing these changes throughout the year can grant you a deeper understanding and appreciation of what's happening in your biotic community.

In 1935, Aldo Leopold and his family began recording detailed phenological observations while at the Shack, a 90-plus-year legacy which is continued today by the Aldo Leopold Foundation. These records allow scientists and casual observers a chance to peer into not only the past, but also the future of our natural world. If you’ve ever looked up the bloom date of your favorite flower or when you might expect to see a certain bird in your backyard, you have likely found an answer giving a few weeks' timespan of when this natural event may occur. Scientists and citizen phenology observers have compiled a rich history of data to help predict when to expect these natural events. With many events now happening earlier than ever, these data also help us understand how life on the land is affected by, and adapting to, climate change. By maintaining Leopold’s legacy of observation and record-keeping, we continue to, in his words, “[enhance] the pleasure of the search, and the chance of finding order and meaning in these events.”

“It’s about noticing what’s happening and about extending your community of care beyond just your world, or the human world, into the natural world.” –Jennifer Sterling, Programs Manager, Aldo Leopold Foundation

Our 2027 Phenology Calendar focuses on climate and weather, exploring how short-term variations and longer-lasting environmental changes are affecting Wisconsin’s flora and fauna. Plants and animals have to cope with both weather and climate. While any given species is generally well adapted to the scope of weather conditions typical of its range, as those conditions shift with climate change, challenges can occur. Many plants are blooming earlier due to warmer spring temperatures, which can put them out of sync with pollinators that respond differently to temperature. Such “phenological mismatches” can also disrupt food availability if an animal responds to long-term climatic patterns but its food source is tied to short-term weather events. In the monthly sidebars, Dr. Stan Temple – Professor Emeritus at the University of Wisconsin – Madison, Wisconsin Conservation Hall of Fame inductee, and Senior Fellow at the Aldo Leopold Foundation – spotlights different climate and weather scenarios and their impacts on featured plant and animal species.

Phenology is a wonderful tradition that is enjoyed by many as a way to build deeper relationships with the natural world. Our calendar is a great tool for newbies and experts alike to take on the practice, tipping you off as to what migrating arrivals or new blooms you might expect on a given day. Throughout the year, enjoy stunning photos of Wisconsin’s flora, fauna, fungi, and landscapes; make note of a wide variety of secular and religious holidays, and historic environmental milestones; and jot down appointments, dates, and your own seasonal nature observations.

This popular item continues to be one of the most sought-after items in the Marshland Market, helping readers discover “the pleasure of the search” and delight in all things natural, wild, and free. Treat the nature lovers in your life or start a tradition of your own―get your calendars today! Order online or stop by the Aldo Leopold Foundation now through October 31st to pick up the 2027 Phenology Calendar in-store.

Buy the calendar online.

Thank you to McFarlanes’ Retail and Service Center and the Wisconsin Cranberry Growers Association for sponsoring the 2027 Phenology Calendar.

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