CObirds does not allow insertion of a link,
but if one goes to key words:
"Mexican Whip-poor-will photos,"
on the top line there is a fine photo of the underside of the tail of
a Mexican WPW. In that image, the white is partly bordered by brown, and thus different from
the horizontal line separating white from black on the Eastern WPW.
I am getting convinced that ID is Eastern Whip-poor-will.
Perhaps it is still there (along west fence, just north of northernmost campsite) and someone
will hear its voice, different from Mexican WPW.
Joe Roller
Denver County
Centennial State