Peter and Linda report seeing both birds below the Main St. bridge this morning and a single bird beneath the Bridge 3 nest. Other bird was presumably incubating inside nest. Earlier in the week they had checked the Granite St. reservoir area and found no birds.
I was able to check on Main St. this afternoon and the female was in the nest. It would appear that she is sitting on eggs now. So both pairs are incubating. The Bridge 3 nest may have hatching anytime after March 30 and the Main St. pair may after April 5. fdl