ResumenInformamos de los primeros registros de la cotorra argentina (Myiopsitta monachus) en varias localidades de los municipios de Toluca y Metepec, dentro del Valle de Toluca en el Estado de México, México, a una altura de 2,617 a 2,764 msnm. Registramos nidos activos en izotes (Yucca spp.) y una colonia de 40 individuos alimentándose en árboles frutales. Debido a que ésta es una especie exótica e invasora recomendamos iniciar programas de monitoreo poblacional para determinar las causas de su establecimiento en estas zonas, así como para determinar posibles efectos en los ecosistemas de la región.Palabras clave: Valle de Toluca, Metepec, psitácidos.
Highest altitudinal record of the Monk Parakeet (Myiopsitta monachus) in Mexico AbstractWe report the first record of the Monk Parakeet (Myiopsitta monachus) in several localities of the municipalities of Toluca and Metepec, in the Toluca Valley, State of Mexico, Mexico; at altitudes ranging from 2,617 to 2,764 masl. We found active nests in Yucca trees (Yucca spp.) and a colony of up to 40 individuals feeding on fruit trees. Given its status as exotic and invasive species, we recommend starting monitoring programmes to know the causes of its establishment in this area and the possible negative effects on the ecosystems of the region.
A new coccidian species (Protozoa: Apicomplexa: Eimeriidae) collected from the red warbler Cardellina rubra (Swainson) is reported from the Nevado de Toluca National Park, Mexico. Isospora cardellinae n. sp. has subspherical oöcysts, measuring on average 26.6 × 25.4 μm, with smooth, bi-layered wall, c.1.3 μm thick. Micropyle, oöcyst residuum, and polar granule are absent. Sporocysts are ovoidal, measuring on average 19.0 × 12.0 µm, with a knob-like Stieda body, a trapezoidal sub-Stieda body and sporocyst residuum composed of scattered spherules of different sizes. Sporozoites are vermiform with one refractile body and a nucleus. This is the fourth description of an isosporoid coccidian infecting a New World warbler.
A new coccidian species (Protista: Apicomplexa: Eimeriidae) is described from the orange-crowned warbler Oreothlypis celata (Say) collected in the Nevado de Toluca National Park, Mexico at 3,000 metres above sea level. Isospora celata n. sp. has subspheroidal oöcysts, measuring 28.4 × 26.4 μm, with smooth, bi-layered wall c.1.2 μm thick. Micropyle and polar granule are absent, but oöcyst residuum is present as a compact mass. Sporocysts are ovoidal, 18.2 × 12.8 µm. Stieda body knob-like and sub-Stieda body irregular and barely discernible. Sporocyst residuum is composed of granules of different sizes. Sporozoites are vermiform with one refractile body and a nucleus. This is the third description of an isosporoid coccidian infecting a New World warbler.
In this study, we found unsporulated coccidia oocysts in passerines from the Nevado de Toluca National Park, Mexico. We captured birds and took samples of their droppings during three field visits. We examined a total of 72 fecal samples and found unsporulated coccidia oocysts in 10 samples from five passerine species: Atlapetes pileatus (3), Cardelina ruber (1), Mniotilta varia (1), Oreothlypis celata (2) and Regulus calendula (3). This appears to be the first recorded study of unsporulated coccidia oocysts in passerine species from Mexico.
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