A large concentration of Masked Ducks (<em>Nomonyx dominicus</em>) in Puerto Rico

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Jack C. Eitniear
Michael J. Morel

Abstract: The little-studied Masked Duck (Nomonyx dominicus) inhabits ponds and small lakes covered with emergent or floating vegetation from southern Texas south through Central and South America (east of the Andes) to northern Argentina. We document a large flock of > 140 individuals at Laguna Cartagena National Wildlife Refuge, Lajas, Puerto Rico, on 5 February 2012.


Keywords: Masked Duck, Nomonyx dominicus, population, Puerto Rico


Resumen: Una gran concentracion de Patos Dominico (Nomonyx dominicus) en Puerto Rico- El poco estudiado Pato Dominico (Nomonyx dominicus) habita en las charcas y lagos pequeños cubiertos de vegetación emergente o flotante desde el sur de Tejas al sur a través del América Central y Sur (al este de los Andes) hasta el norte de Argentina. Documentamos un gran rebaño de > 140 individuos en el Refugio Nacional de Vida Silvestre de la Laguna Cartagena, ubicado en el municipio de Lajas, Puerto Rico, el 5 de febrero 2012. 


Palabras clave: Nomonyx dominicus, Pato Dominico, población, Puerto Rico 


Résumé: Forte concentration d’Érismatures routoutous (Nomonyx dominicus) à Porto Rico- L’Érismature routoutou (Nomonyx dominicus), espèce peu étudiée, vit en Amérique centrale et en Amérique du Sud, depuis le sud du Texas jusqu’au nord de l’Argentine, sur des mares et des petits lacs couverts de végétation émergente ou flottante. Nous décrivons un groupe de plus de 140 individus observés sur la lagune de la réserve nationale de Laguna Cartagena, Lajas, Porto Rico, le 5 février 2012. 


Mots clés: Érismature routoutou, Nomonyx dominicus, population, Porto Rico

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