The aquatic birds of Mexico include both a rich fauna of residents and a significant proportion of migratory species that breed in Canada and the United States, yet their distribution and richness patterns remain poorly known. We developed a detailed database of occurrences, and estimated distributions using niche modeling interpolations for 134 species associated with wetlands. Validations of the resulting maps indicated that the niche-modeling approach yields a useful picture of aquatic bird species distributions in the country. Richness patterns among aquatic birds differ from those for landbirds: species richness is concentrated in coastal areas, but endemism is focused in the Transvolcanic Belt and the Altiplano. Place prioritization exercises identified sets of areas that would maximize the protection of this diversity.

We report records of Eurasian Collared-Dove (Streptopelia decaocto), Monk Parakeet (Myiopsitta monachus), and Orange-fronted Parakeet (Eupsittula canicularis), in the estuaries and floodplains of the Important Bird Area ‘Humedales de Alvarado’, Veracruz, from 2011 to 2014. Both exotic Parakeets were observed in mixed flocks with native Olive-throated Parakeet (Eupsittula nana). These species can out compete for resources with native birds andneed to be monitored. Both S. decaocto and M. monachus are successfulinvaders in many urban areas of Mexico.

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Reportamos dos especies de aves no registradas con anterioridad en el Estado de México. Una hembra del chipe dorado (Protonotaria citrea) fue recolectada en el jardín botánico de la Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México (FESI-UNAM), al norte del Valle de México, y un ejemplar (sexo indeterminado) del chipe de roca (Euthlypis lachrymosa) fue recolectado en la cuenca del río Balsas al sur del Estado de México. Ambos fueron depositados en la Colección de Aves del Museo de Zoología “Alfonso L. Herrera” de la Facultad de Ciencias, UNAM.

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