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USA National Phenology Network
January 9, 2017
You can use the USA-NPN's Phenology Visualization Tool to view maps of Accumulated Growing Degree Days (AGDD) to how the current accumulation compares to a long-term (1981-2010) average. Check the map to see how this year is stacking up!
The first section of the Phenophase Primer is now available for download. This beautifully illustrated guide provides detailed information on how to identify each of the phenophases we ask you to observe on the Nature's Notebook datasheets. Please note that this is a draft version; a final version with information about conifers and more photos will be released next year. Once all three sections are complete, we will offer a printed and bound copy, much like we do for the popular Botany Primer.