two-groove odostome

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Boonea bisuturalis (also known as the three-toothed odostome or the two-groove odostome) is a species of small sea snail, a pyramidellid gastropod mollusk or micromollusk in the family Pyramidellidae, the pyrams and their allies. The species is one of eleven known species within the Boonea genus of gastropods. This species is ectoparasitic (an external parasite) on various bivalves and other gastropods.

El porrón americano, porrón de cabeza roja o pato cabeza roja (Aythya americana)​ es una especie de ave anseriforme de la familia Anatinae propia de Norteamérica. Descripción El porrón americano mide entre 45 y 58 cm de largo,​ con una envergadura alar de unos 84 cm. El macho adulto tiene pico gris azulado salvo la punta y una fina lista en la base que son negras.