Status and Trends Program

Data and Tools

Filter Total Items: 9
Date published: August 10, 2018

Principal components of climate variation in the Desert Southwest for the time periods 1980-2010, 2040-2070 (RCP8.5) and (RCP4.5) - data release

Five principal components are used to represent the climate variation in an original set of 12 climate variables reflecting precipitation and temperature gradients. The dataset provides coverage for four regions (the Sonoran Desert, Mojave Desert, Colorado Plateau, and Southern Great Basin) and two time periods: current climate (defined as the 1980-2010 normal period) and future climate (...

Date published: August 10, 2018

Climate Distance Mapper - web application

Climate Distance Mapper is a spatial decision-support tool designed to help land managers match seed sources with restoration sites. Plant populations are commonly adapted to local climate gradients and frequently exhibit a home-site advantage. For this reason, climate information may serve as a proxy for local adaptation in restoration designs. Climate Distance Mapper allows users to rank the...

Date published: March 1, 2018

NPN Visualization Tool

Phenology map viewer from the National Phenology Network.

Date published: January 1, 2018

Spring leaf and bloom index dates (1880-2013) and migratory bird flyways

Historical values for the Extended Spring Index (SI-x) of First Leaf. Each pixel is assigned a day of year value for the First Leaf Index. The Extended Spring Indices are mathematical models that predict the "start of spring" (timing of leaf out or bloom for species active in early spring) at a particular location. This model was constructed using historical observations of the timing of first...

Date published: February 8, 2017

The North American Breeding Bird Survey, Results and Analysis 1966 - 2015

This website presents population change information for more than 400 species of North American birds, as estimated from the North American Breeding Bird Survey. Estimates of trend (interval-specific estimates of population change), annual indices of abundance, and maps of abundance and population change for these species are presented for a variety of regions.

Date published: January 1, 2017

Plant Phenology Site Phenometrics + Accumulated Growing Degree Day Calculations for the continental United States (2009-2016)

This datafile consists of a subset of plant phenology observations drawn from the USA National Phenology Network’s National Phenology Database ( The data were collected by citizen and professional observers and archived and distributed by the USA National Phenology Network. Protocols are available in Denny et al. (2014). This...

Date published: March 4, 2016

The National Phenology Database

The database houses contemporary and historical data on organismal phenology across the nation. These data are being used in a number of applications for science, conservation and resource management. Customizable data downloads using specific dates, regions, species and phenophases, are freely available.

Date published: January 1, 2016

Accumulated Growing Degree Days, Contiguous United States, 1981 - Current Year

The USA National Phenology Network has available a series of gridded products enabling researchers to analyze daily Accumulated Growing Degree Days (AGDD) from 2016 through the current year. Heat accumulation is commonly used as a way of predicting the timing of phenological transitions in plants and animals. Products generated by the USA-NPN begin accumulation on January 1 and use either a...

Date published: January 1, 2016

Phenology Observation Data

This suite of datasets consists of in-situ phenology data on over 1000 species of plants and animals (2009-present) and data on lilacs and honeysuckles (1956-present), across the United States. These data were collected by citizen and professional observers, and are archived and distributed by the USA National Phenology Network ( Protocols...