In addition to all of the ducks and geese at the Causeway, amply described in
previous postings, a flock of cedar waxwings accompanied me on my walk out to
the "cut" on Friday afternoon. Which brings me to a question. According to
the books, Bohemian waxwings have reddish-brown undertail coverts and when I
see them through binoculars that's true. But when I see them through my scope
the undertail coverts often appear to be yellow. Likewise, I note that in Rich
Ennis's photos they appear to be yellow as well. Does anyone have an
explanation for this phenomenon?