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Publications Using USA-NPN Data

The USA-NPN has contributed to the development of over 100 peer-reviewed publications. Collectively the models, observational data, and gridded data have served to advance the science of phenology by increasing understanding of phenological patterns and climatic drivers of plants and animals at local to continental scales.

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Data Quality

Explore how we implement measures to ensure plausibility, validity, and reliability of our data.

 
 
External Datasets

Search an existing dataset or share an external dataset.

 
 
Data Attribution Policy

Read our Data Use and Data Attribution Policies.

 
 
Data Products

Learn about our process for data product development as well as the data sources, models and software we use.

 

Data Dashboard

Up-to-the-minute summary metrics of the data found in our National Phenology Database for the current year and past years.

 

Metric 2013 2014 2015 2016 2017 2018 2019 2020 2021 Total
Registered Observers 3,109 3,948 4,433 4,482 5,713 5,256 6,715 5,594 5,255 51,861
Active Observers 1420 1958 2738 3032 3639 3585 3577 3506 3505 22830
Days Observed/Observer 12.59 13.23 12.42 16.22 14.73 16.24 14.28 10.11 10.83 17.78
Registered Sites 3,225 2,785 2,609 2,574 3,393 3,744 3,468 4,677 4,154 39,250
Active Sites 1,608 1,880 1,921 1,876 2,342 2,859 2,457 3,249 3,058 17,627
Observations 155861 223814 266411 379932 455643 475439 488786 343762 335550 3523312
Status Records 1240891 1747914 2099731 2935732 3649360 3648597 3798193 3090109 3192046 27606095
Observed Organisms 9303 11997 12519 15046 18571 21558 20073 21660 19400 87804
Observed Plants 6778 9260 9769 12206 14890 17718 15939 16517 15212 65481
Observed Animals 2525 2737 2750 2840 3681 3840 4134 5143 4188 22323
Species Observed/Observer 4.78 4.92 4.22 4.54 4.63 5.01 5.04 4.91 5.31 4.31
Plants Species Observed/Observer 3.38 3.57 3.24 3.61 3.66 4.07 3.89 3.8 4.27 3.38
Animals Species Observed/Observer 4.94 4.18 4.18 3.98 4.65 4.5 4.73 4.59 5.34 4.06
Mobile App Records 5.64 11.89 12.34 18.56 22.89 25.36 28.97 43.98 56.59 26.41
Active LPPs 73 113 142 155 169 181 196 177 171 432