Blue Jays bury acorns and other nuts to be eaten later. They have an excellent memory and know where most acorns are buried. As a result of uneaten, cached acorns, this species is responsible for "planting" some oak trees.
Cormorants, geese, ducks, cranes, etc. usually fly in a "V" formation. Supposedly, all but the lead bird gain lift from wing-tipped vortices produced by the lead bird.
This is the month to install and repair nest boxes for use next year.
Pine Siskin return early this month and in late September.
Sandhill Cranes return to the area.
Autumn colors peak in the third week of October.
Waterfowl migration continues to build.
Ruby-throated Hummingbirds have departed by the 15th.
Most Wood Ducks migrate south this month.
White-tailed Deer bucks go into rut.
Juncos and White-throated Sparrows become common at feeders.