Hello, In search of the Common Loon,[no show], at Boulder Res. I had a lone Fos Black necked Stilt. I got to Cottonwood Marsh around 9 am and found 22 White Faced Ibis. The 3 American Avocets were still there as well as 2 pair of Blue winged Teal , and Three Cinnamon Teal,[2 males]. Several House Wren were in full voice over by the creek at Sawhill. Good April Birding to all, Carl Starace, Longmont