While Beal Lake is not ideally suited for photography (bad light and distant birds are the rule), I did manage to photograph several of the Short-billed Dowitchers along the river today. Several are below. These birds are all juveniles - adults would be obvious with mainly reddish underparts. Note the reddish blush on the breast, a good mark for juvenile Short-billed Dowitcher, as well as general shape. The most important mark visible in the photos is the well-patterned wing coverts and tertials. On juvenile dowitchers, rufous internal markings on the tertials is a great ID clincher - but note that it only works for juveniles. Not visible in photos is the call note - a "tututu" reminiscent of yellowlegs, very different from the frequent "kik" calls of Long-billed.
The first photo is David's shot of the bird at the Island STP in Lake Havasu City. All the rest are my photos of birds along the Colorado R. today.