Herein we report cases of leucism in Molossus molossus and Sturnira bakeri from three locations of lowlands of western Ecuador, which include three gravid females, five juvenile, four subadult, and six adults. The M. molossus specimens showed white spots on several parts in the soft part of body (ears, tragus, propatagium, uropatagium), and fur (throat, abdomen), while individual of S. bakeri presented a whitish-yellowish patch on its dorsal region, very contrast in yellow-shoulder bats. Although South America has a significant information gap about chromatic disorders in bats, been necessary to continue reporting cases of chromatic disorders to try to determine their causes.

Accipiter bicolor es una rapaz Neotropical ampliamente distribuida pero el conocimiento sobre su ecología es escaso en particular en zonas urbanas. En este trabajo, documentamos la presencia de A. bicolor en la ciudad de Guayaquil y en áreas boscosas cercanas, además, proveemos nuevos registros sobre su dieta y discutimos posibles estrategias de forrajeo en ambientes sinantrópicas. También, se consideran reportes de esta especie en plataformas de ciencia ciudadana. Accipiter bicolor fue observada consumiendo un individuo de Columbina bluckeyi y otro de Artibeus fraterculus; cerca de una colonia de esta especie de murciélago. Finalmente, se encontraron 59 registros de A. bicolor entre el 2007 y 2022 para Guayaquil y sus áreas circundantes, 14 registros fueron en hábitat urbanos. Se discute las observaciones en diferentes hábitats urbanos y periurbanos, así como sus hábitos de a...

Herein we report cases of leucism in Molossus molossus and Sturnira bakeri from three locations of lowlands of western Ecuador, which include three gravid females, five juvenile, four subadult, and six adults. The M. molossus specimens showed white spots on several parts in the soft part of body (ears, tragus, propatagium, uropatagium), and fur (throat, abdomen), while individual of S. bakeri presented a whitish-yellowish patch on its dorsal region, very contrast in yellow-shoulder bats. Although South America has a significant information gap about chromatic disorders in bats, been necessary to continue reporting cases of chromatic disorders to try to determine their causes.

We present a case of chromatic disorder observed in a specimen of Trachops cirrhosus from lowland forests of the Ecuadorian Amazon. During the field work, six individuals of this species were captured with mist nets in an intervened habitat, of which, a juvenile male specimen was distinguishable from the rest of the individuals due to the presence of whitish spots on the ventral region, on the chest and abdomen. We discuss the previous reports of this type of pigmentary disorders in bats from Ecuador, and in the Neotropic, documenting the first record of Trachops cirrhosus with this condition for the country.

La Reserva Ecológica Manglares Churute es un área protegida ecuatoriana que se ha visto afectada por mortalidades de fauna silvestre provocada por atropellamientos, sin embargo, esto no se ha evaluado o documentado de forma sistemática. Nuestro objetivo fue evaluar estas mortalidades en tres tramos de una vía que cruza por el área protegida. Durante doce meses se realizaron dos visitas semanales desde las 8:00 hasta las 14:00. Al hallar un animal colisionado, se procedía con la identificación in situ, registro fotográfico, y georreferenciación. Se calculó la tasa de atropellamiento (individuo/Km) en cada tramo, y por grupo taxonómico. Para determinar diferencias significativas entre tramos y grupos taxonómicos aplicamos la prueba no paramétrica de Kruskal-Wallis. En este estudio, hallamos 224 individuos muertos, distribuidos en 11 especies. Los mamíferos y aves presentaron ...

This study presents the morphological characterization of guard hairs from six species of small non-flying mammals. Guard hair samples were obtained from both live individuals and museum specimens, with cuticular and medullary impressions made from the middle portions of the shafts and shields, respectively. A total of 112 samples were collected from the following species: Marmosa simonsi, Metachirus myosorus, Sigmodon peruanus, Aegialomys xanthaeolus, Rattus sp., and Mus musculus. This information can be used for taxonomic identification and, for instance, in the identification of prey items in carnivore and nocturnal raptor diet studies, which are areas lacking information in western Ecuador.