Updated Sep 29
Pictured: Bill Williams River Refuge · typical peak lookArizonaspring migration
When does spring bird migration peak in Arizona?
Spring bird migration usually peaks from February to June.
Updated Sep 29.
Places by state
Arizona
- Bill Williams River RefugeSeason over
Local timing: late April to early May
Official reports
Dated and linked
- Sep 29Park ServiceSeasons of wildlife: spring songbird migration peaks late April to early May; summer nesting songbirds and reptiles; fall and winter waterfowlSource (opens U.S. Fish and Wildlife Service, Bill Williams River NWR: Species (Seasons of Wildlife) in a new tab)
- Sep 29Park ServiceDirections, fees, restrooms, hours, and the Peninsula and Delta Loop trailsSource (opens U.S. Fish and Wildlife Service, Bill Williams River NWR: Visit Us in a new tab)
How do you track spring migration? Each place moves through 4 stages: Birds arriving, Numbers building, Peak numbers and Birds moving on. Every stage we show comes from a dated report with its source, and every forecast lists its sources.