We rented a cabin about 5 miles from the Alamosa National Wildlife Reserve.  This reserve has a walking trail that takes one along a canal to the Rio Grande River.  It also has a loop drive with several pull outs to observe various birds.
Canal to the Rio Grande
Rio Grande River
Cliff Swallow nests
Closeup of Cliff Swallow in nest
Cinnamon Teals
Red Winged Black Bird