T.M. Crimmins
E.G. Denny
C.A.F. Enquist
K.L. Gerst
A.H. Rosemartin
Jake F. Weltzin
Jherime Kellermann
2013
<p>In 2012, 2,045 observers contributed 1,592 sites to the NPDb, encompassing all 50 states, the U.S. Virgin Islands, and Puerto Rico. At the close of 2012 the NPDb contained a total of over 1.6 million phenophase status records. More than half of these records were submitted in 2012. Observers submitted records on 547 species in 2012, including 371 plant species (comprised of 5,584 individual plants) and 176 animal species. Red maple (<i>Acer rubrum</i>) and American Robin (<i>Turdus migratorius</i>) were the most observed plant and animal species in 2012. Plant phenophases related to fruiting and flowering had the most records in 2012 and in all years combined, whereas animal phenophases related to feeding had the most records.</p>
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USA National Phenology Network
Nature's Notebook 2012: State of the data
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