Bradbury Mountain State Park Professional Review and Guide
"Bradbury Mountain is an off-the-beaten-path state park that offers hiking, camping, and of course birding. The mountain summit, the highest point for many miles around, offers superb views of Casco Bay, parts of Sebago Lake, and on a clear day, Mount Washington in nearby New Hampshire. Bradbury Mountain is a prime southern Maine location for watching migrating birds of prey. Spend a day here in spring and you can see 100 or more Broadwinged Hawk.
Also look for Red-tailed Hawk, Sharp-shinned Hawk, and kestrels. If you are lucky you might even spy a Peregrine Falcon. You will probably see Turkey Vulture and possibly Bald Eagle and Osprey. For the maximum number of migrating birds, best viewing happens when the wind blows from the southwest. The rest of the park, including the bulk of the mountain with the exception of the summit, is forested with mixed-growth hardwoods and softwoods. In spring, especially May, look here for woodland warblers."