I kept track of the Barn Swallow nest on the reservoir going back a few times over three weeks. Only one nest was visible, but it was clear there were more nests under the arches of the eastern gatehouse of the two north gatehouses.

All of the nests appeared to have fledged by the third week of July. Then for a few days, the fledglings hung out on the gatehouses. By late July they were spending the day primarily on the North Meadow.