Quercus phenology data

These data were obtained from the USA National Phenology Network (USA-NPN) database, accessible at www.usanpn.org/results/data. Data were collected by citizen and professional scientists through the Nature's Notebook monitoring program (www.naturesnotebook.org). This dataset was selected from the "Individual Phenometrics" data type available from the USA-NPN Phenology Observation Portal which delivers derived estimates of phenophase onset and end for individual plants. This dataset was customized by selecting all available data for four species of Quercus: Q. alba, Q. agrifolia, Q. lobata, and Q. rubra from 2009-2014 on two phenophases, "breaking leaf buds" and "flowers and flower buds". The dataset was filtered to only include onset dates that were detected within 7 days of a negative observation record. This data files includes one tab with estimated onset and end dates for phenophase activity and one tab with data field descriptions. For additional information on USA-NPN protocols and phenophase definitions visit www.usanpn.org/data.