I use the following to help sort out if I need to stay home or go try it. Works well for Dove, Geese, Ducks, etc. It will give reads on crows and other migratory birds, but if it shows a good flight happening, I've had it hold true in the field as well.
https://birdcast.info/migration-tools/live-migration-maps/
Just thought I would share.
https://birdcast.info/migration-tools/live-migration-maps/
Just thought I would share.