Where the birds are
Migration and conditions map
Switch layers on to see what’s pushing birds into the Delta this week. Each layer loads only when you turn it on.
Reading the map
What each layer means for hunting
- Duck countsWhere state and refuge biologists last counted birds. The date matters: a count two weeks old may not show today's birds, and last season's counts only show where birds wintered then.
- TemperatureHard cold up north pushes birds south. A warm week here usually means fewer new birds.
- Cold fronts and windA strong north wind behind a front is when new ducks often show up in the Delta.
- Snow up northWhen water and fields freeze up north, ducks run out of food there and move down the flyway.
- River levelsHigh water spreads ducks out into flooded timber and fields; low water bunches them up and can block ramps.
- Public landTap an area for its type, managing agency and a link to the official page or our guide.
Weather and river layers come straight from NOAA's public map services and are shown as NOAA publishes them. Duck counts come only from the agencies' own survey reports and data (AGFC, MDWFP, TWRA, USFWS), refreshed nightly and shown with each survey's date and a link to the report. We don't use other sites' migration maps, bird-sighting apps or user reports.
Before you go
Check the rules and the water
Confirm this season’s rules on our state law pages or the agency’s own site, check draw and permit deadlines, and look at today’s river levels on the migration map. Areas can close or flood on short notice.