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"Synthliborhamphus antiquus. Nipper-nosed Murrelet. Bill somewhat as in Brachyrhamphus, but stouter and deeper for its length; greatly compressed throughout, its depth at base about half as much as length of culmen; culmen moderately convex, gonys ascending. Nostrils sub-basal, broadly oval or nearly circular; nasal fossae small and shallow, feathered to nostrils." Elliot Coues, 1884

Black-throated Murrelet

"Synthliborhamphus antiquus. Nipper-nosed Murrelet. Bill somewhat as in Brachyrhamphus, but stouter…