Comparing Ruby-throat First Sightings Data
Using Map Archive Data
Ruby-throated | Rufous | Activity


What can we learn about hummingbird migration by exploring historical maps and data? How does the migration compare from year to year? In these map archives, each year's migration data is captured and ready for scientific study and comparison.

Access Data Record Data Graph Data Analyze Data

Access data in Archives

Record data

Summary and Analysis chart

Map Archives
Ruby-throated | Rufous

Recording Chart Blank | Sample Chart | Guide

Weather Data: Further Resources for Study

Weather information can be helpful for exploring factors that influence migration rates. Compare and analyze weather data from the archives of the National Oceanic and Atmospheric Administration (NOAA). Archives include maps showing temperature averages and departures for each month from 1999 to the present.

 temperature archives_ NOAA

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