At the south end of Pintail Pond, between the pond and the Tualatin River at Jackson Bottom Wetlands Preserve, 2600 SW Hillsboro Hwy, Hillsboro, OR. Visible from a distance at the north end of Pintail Pond and other points on the preserve. Trail closures were in effect during nesting season in 2014, 2015 and 2016. In 2017 we did not close the trail that goes beneath the nest, thus allowing foot traffic and construction related vehicle traffic. As of the end of May, the pair has shown no ill-reaction to this. 2018 - their is a new nest platform and perch atop a new pole, now located inside Pintail Pond. The pair is building their nest and mating as of the end of March. MAY 31, 2018 - both birds still exhibiting incubation posture when on the nest. We observed behavior one week ago that we thought indicated nestlings but since then we don't have any conclusive observations of chicks in the nest.