RESUMEN 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. ABSTRACT We report here 11 new records of birds from several localities on the northeast of the state of Hidalgo. In addition, the extension of the area of distribution of Tigrisoma mexicanum is indicated. Sampling sites have patches of evergreen seasonal forest, cloud forest, riparian and disturbed habitats. Of the recorded species, Vireo atricapilla is considered as Endangered by the NOM-059-ECOL-2001.

Temperature plays an important role in the behavior, ecology, physiology, and evolution of reptiles. Herein, we present selected body temperatures on 9 species of Phrynosoma under laboratory conditions, and note congeneric differences related to altitude and reproductive mode. The results are discussed with those of other phrynosomatid lizards.

Geographical distribution and habitat of Trochilidae (Aves) in the state of Guerrero, Mexico.The distribution and abundance of species of Trochillidae family is usually influenced by the flowering and phenology of plants used as a feeding source, mainly in primary forest, so that changes in vegetation cover could impact their populations. We analyzed and characterized the geographical distribution and habitat for 22 species of resident hummingbirds in the state of Guerrero using the vegetation and the land use map of INEGI Series IV (2007-2010. Distribution models were generated with the Genetic Algorithm for Rule Set Production (GARP), using historical records of scientific collections and fieldwork (2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009), in combination with climatic and topographic variables. Of the 22 modeled species, six are endemic to Mexico, the same number of species found in a risk category. The highest concentration with regards to richness (14-20 species), endemism (5-6 species) and number of threatened species of hummingbirds (5-6 species) occurred in the biotic province of Sierra Madre del Sur. However, the potential distribution of most of the hummingbirds occurred in disturbed sites or agroecosystems, as a result of changes in land-use. For Campylopterus hemileucurus, Lamprolaima rhami and Heliomaster longisrostris, their potential distribution was highest in areas of primary vegetation. Areas of high hummingbirds presence do not coincide with the Important Bird Areas proposed for bird conservation in Guerrero, considering that, despite its diversity and its extreme popularity, from the conservation perspective hummingbirds have received relatively little attention. Rev. Biol. Trop. 64 (1): 363-376. Epub 2016 March 01.

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Small, secretive snakes comprise an important part of the herpetofauna of the Neotropics and yet most species are known from a handful of specimens due to their habits and relatively inaccessible localities. The Mexican endemic Rhadinella dysmica is the westernmost species of the genus and was described based on a single adult female. Herein we provide information on new specimens, including their morphological variation and hemipenial structure, expand the known geographic range for the species, and comment on the morphological similarities of the “dark-colored” species of the genus.