Visualize Phenology Data

Explore Phenology Models & Maps

Download Observed Data

Access API Code & Tools

Data Metrics

Contributions to the National Phenology Database

Total Metrics

33,045

All-time

Active Observers

44,770,588

All-time

Observation Records

22,743

All-time

Active Sites

Current Year Metrics

903

2026

Active Observers

300,229

2026

Observation Records

669

2026

Active Sites

More Data Resources

 
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.

 

Publications Using USA-NPN Data

The USA-NPN has contributed to the development of nearly 200 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.

 SEE PUBLICATIONS