Aberrant plumages in Mexican birds are rarely documented; in this work we report a record of partial leucism in the House Sparrow (Passer domesticus) in Cd. Victoria, Tamaulipas, Mexico. We discuss on the low incidence of this phenotypic alteration

Our primary objective was to compile a comprehensive dataset on bird–window collisions throughout the Neotropical region, including both published and unpublished sources. On May 12, 2020, we extensively disseminated invitations to provide data via email and social media platforms. By providing a template worksheet, we required standardized information from collaborators to complete and register their data. To better understand how these data were acquired (e.g., incidental observations and systematic procedures), we sent out a survey to all collaborators. We established rigorous validation criteria for data inclusion and conducted thorough curation procedures to ensure accuracy. After the filtering process, we compiled a total of 4103 bird–window collision reports. These came from 11 Neotropical countries, dating from 1946 to 2020, and revealing distinct regional patterns and potential seasonal patterns. The five most frequent orders were Passeriformes (2451), Columbiformes (520), Apodiformes (377), Psittaciformes (202), and Piciformes (186). Data on bird–window collisions were collected through a local specific systematic protocol (1419), by chance (1252), by government agencies (742), and by other approaches (632), while a few reports were collected by unknown procedures (58). The volume of records across months in our dataset suggests that there may be temporal patterns, with peaks: the first one in March–April and the second one in October–November, which seem to align with the major migration and reproduction seasons. This dataset represents the first comprehensive effort in the Neotropical region focused on bird–window collision data, providing valuable insights for further scientific advancements and conservation policies. The data are free from copyright or proprietary restrictions. Please cite this data paper when using the data in publications or scientific presentations.

Conocer la diversidad y distribución de las especies de aves de un área natural protegida contribuye a desarrollar acciones de conservación. En este trabajo se presenta el listado de aves del Parque Nacional Los Mármoles, Hidalgo, México. Para obtenerlo se conjuntaron observacionesde 5 años de muestreo. Para el registro de las especies se emplearon puntos de conteo y trayectos para las aves diurnas, y estaciones de escucha para las aves con actividad nocturna, registrándose un total de 195 especies de aves. Del total de especies 137 fueron catalogadas como residentes permanentes, 44 como migratorias invernales, 6 como migratorias de verano y 8 como transitorias. El mayor número de especies se registró en el Bosque de Pinus-Quercus (91 especies), seguido por el Bosque de Juniperus (64) y el bosque de Quercus (57). Se registraron 15 especies bajo alguna categoría de riesgo y 26 especies con algún grado de endemismo para México. La diversidad registrada del parque equivale al 38% de la avifauna del estado de Hidalgo y cerca del 17% de la avifauna de México.

Presentamos 11 nuevos registros de aves procedentes de localidades del extremo noreste del estado de Hidalgo. Además, se indica la ampliación del área de distribución de Tigrisoma mexicanum. Los sitios de muestreo corresponden a parches de selva mediana subperennifolia, bosque mesófilo de montaña, vegetación riparia y áreas perturbadas. De las especies registradas, Vireo atricapilla es considerada en Peligro de Extinción por la NOM-059-ECOL-2001.