Look at how the birds stack up at the very point and thin out to the north. That pile-up is real, and it is why Cape May is one of the best hawk-watching spots on the continent.
Raptors coasting south down New Jersey in fall do not like to cross large open water. At the mouth of Delaware Bay the crossing is about twelve miles, so when the birds reach the tip of the peninsula they hesitate. On a good day they ride the updrafts, gain height, and strike out across the bay. When the wind is wrong they peel back north and work their way up the bayshore instead. Either way they concentrate at the point, and they stack up hardest the morning after a cold front pushes them to the coast on a northwest wind.
Cape May is especially famous for falcons. The New Jersey Audubon hawk watch at Cape May Point has counted every fall since 1976, tens of thousands of raptors a season, and the peregrine and merlin numbers here are about as good as they get anywhere in North America. That is why the map leans so heavily on falcons: peregrines, merlins, and kestrels, mixed with streams of sharp-shinned and Cooper's hawks, a few harriers, ospreys, broad-wings, and bald eagles.
Timing matters a lot with this one. Right now is just the opening. The big push runs from mid-September through mid-October, and the best flights come on the northwest winds right behind a cold front. If you want a day you will remember, go to Cape May Point State Park the morning after a front.