Left: The great blue heron weighs 5 lbs and has a wingspan of 6 feet. Right: The yellow warbler weighs 0.36 oz and has a wingspan of 7 inches. Photos by George Ho, MD

These photos of the great blue heron, a ubiquitous large shorebird that hangs around shallow water hunting for fish, and the yellow warbler, a common song bird with bright color and a beautiful melody, were photographed recently at the Rocky Mountain Arsenal National Wildlife Refuge around Lake Ladora. They are also commonly seen in Central Park and along Sand Creek. Photos and information by bird watcher George Ho.