- Shorebird migration builds and waterfowl migration starts.
- Purple Martins begin heading south (adults by the start of the month, juveniles by the end of the month).
- Broad-winged Hawk migration begins.
- Chimney Swifts can be seen in large flocks over chimneys at dusk.
- Second brood of hummingbirds begin to appear at feeders early- to mid-month.
- American Goldfinches are fledging late this month.
- Migration begins for Ospreys and raptors.
- Early warblers (Cape May, Tennessee, Magnolia, Blackburnian) are migrate southward.
- The peak of Ruby-throated Hummingbird fall migration is mid-August.
- Carolina Chickadees begin forming pairs (protracted during non-breedng season).
- Perseids Meteor shower is mid-month.