Bird was calling constantly until I attempted to enter the riparian area. That is when it stopped calling. I never got a look at it even though it could not have been more than 40 yards away calling from the top of the cottonwoods. The location is from the main parking area to the north take the trail that goes directly to the river from that parking lot and a small Trail leads to the right car in from there you are about 30 to 40 yards on the main trail from the site where the bird was calling Sent from my Verizon Wireless 4G LTE DROID