February 1983 – vol. 76, issue 2, pp 81–82 A warbler scuttles through the reed fringe and stops, partly obscured by reed stems. Some pretty quick assimilation of field characters is called for before it dives back into the depths. Those who have studied the different structure and facial patterns of the various families of warblers will be the most likely to make a correct diagnosis: the facial pattern differences are often so subtle that ... This article is only available to registered users.To read more, please log in or purchase a subscription.