I have lived by the beach in Amagansett long enough to be able to tell summer’s changes from the sound of the birds. Now that it is August, spring’s crazy pre-dawn ringing of songbirds in the brush is replaced by the feeding calls of terns hunting baitfish in the shallows. The wind from the north has kicked up small waves, providing an impossible-to-describe background as a few gulls make their lazy yawps.