Three of the swans at Otter Pond have neck collars, one red and two yellow. After zooming in on about a million photographs from 5 different dates, those taken on 1/4/2011 provided a readable number on the red neck-collared bird. It is the same bird I photographed on 12/29/2009, back for a second year (for me, real number of winters here is to me). Can't see a thing on the yellow collars. Have reported the latest observations to USGS. John Rice