On Thursday I was surprised to band a fairly bright Mourning Warbler. Usually by now both sexes would be in their drab fall plumages. Little is known about the breeding biology of this warbler. One reason is that this species prefers tangles and thickets and so is hard to observe. Because of its predilection for dense habitat--the sort that often appears after lumbering--the Mourning Warbler is one of a few of our neotropical migrants that may be more common now than in relatively recent history.