Migration Pattern Calculator
Predict flyway timing, stopover duration, and migration windows for migratory bird species based on location, season, and species group.
Inputs
°N
km/h
grams
Results
Current Migration Status
Spring Migration (3% through)
Spring Peak Date
Apr 27
Fall Peak DateSep 14
Spring Migration WindowApr 9 – May 15
Fall Migration WindowAug 27 – Oct 2
Adjusted Flight Speed61 km/day
Estimated Migration Distance2,200 km
Total Migration Duration108 days
Avg. Stopover Duration4 days
Total Energy Cost277 kJ
Stopover Frequency10
How to Use This Calculator
- Select Flyway (Atlantic, Mississippi, Central, or Pacific) for waterfowl, or the relevant corridor for other species.
- Choose Species Group (waterfowl, shorebirds, raptors, neotropical songbirds) for species-specific timing data.
- Enter Observation Latitude (°N) — latitude drives phenological timing within each flyway.
- Input Current Day of Year (1-365) to see current migration status relative to historical peak dates.
- Set Average Tailwind Speed (km/h) and Average Body Mass (grams) to estimate daily flight range.
- Review Migration Status, Spring Peak Date, and daily flight range estimates for survey planning and hunting season timing.
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