Green-winged teal, widgeon, pintail and gadwall begin migrating through Illinois.
Canada geese begin arriving in southern Illinois about third week of the month.
Doves feed actively, form flocks and begin migration.
Indian grass and big and little bluestem bloom in prairies.
Hen-of-the-woods mushrooms develop in woods.
Muskrats begin building lodges.
White oak acorns fall, paw paw fruits ripen.
Rabbit breeding and nesting ceases for the year.
Ruffed grouse and pheasant broods begin to break up.
Deer molt their summer coats.
Monarch butterflies start migrating.
New moon Sept. 14, full moon Sept. 28.
Illinois statewide Canada goose hunting season Sept. 1-15.
Statewide squirrel hunting season open (Aug. 1-Jan. 20).
Split statewide dove hunting season (Sept. 1-Oct. 14).
Illinois early teal hunting season Sept. 11-19.
Woodchuck trapping season closes Sept. 30.
Sept. 7 last day to apply for firearm/muzzleloader deer permits, random daily drawing.
Sept. 15 first day of random daily drawings for firearm/muzzleloader deer permits (Sept. 15-Nov. 5).
Sept. 20 first day to apply for fall shotgun turkey permits, random daily drawing.