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Objective. The relative abundance and activity patterns of the common opossum Didelphis marsupialis were determined in a peri-urban area of Medellín municipality, Antioquia department. Materials and methods. The study was developed in the Remington Veterinary practice at Santa Elena Corregimiento. The data recording was carried out through camera trapping methodology for three months (June-August 2017) with a total effort of 166 days-camera. Results. With a total of 275 independent records, we calculate the relative abundance index (52.88 UNITS). The activity patterns show a first activity peak beginning the night (19:00) and a second one after midnight (3:00), reducing the activity in the sunrise hours. Conclusions. These results present a high relative abundance in comparison to another Colombian localities, besides a population active reproductively. At the same time, they become a tool to support conservation strategies and sensitizing local people about the wildlife of this region., Objetivo. Determinar la abundancia relativa y los patrones de actividad de la zarigüeya común (Didelphis marsupialis) en una zona periurbana del municipio de Medellín, departamento de Antioquia. Materiales y métodos. El estudio se desarrolló en la sede de prácticas y clínica veterinaria Remington ubicada en el corregimiento de Santa Elena. Para el registro de datos se empleó la metodología de fototrampeo durante 3 meses (junio-agosto de 2017), invirtiendo un esfuerzo total de 166 días/trampa. Resultados. Se obtuvieron un total de 275 registros independientes de la especie y se estimó una abundancia relativa de 52.88. El patrón de actividad muestra un primer pico de actividad al comienzo de la noche (19:00) y un segundo pico en la madrugada (3:00), con una posterior disminución hacia las horas de la madrugada. Conclusiones. Los resultados muestran una abundancia relativa alta con respecto a otras localidades en Colombia, además de evidenciar una población reproductivamente activa. Al mismo tiempo se convierten en una herramienta para el fortalecimiento de estrategias de conservación y sensibilización a los pobladores locales sobre la fauna de la región.

We present notable records of golden opossum (Caluromys derbianus), anteater (Tamandua mexicana), and porcupine (Coendou mexicanus), three cryptic species, with arboreal habits considered cared for in Mexico, whose presence in Oaxaca is historical or scarce. The record of golden opossum was obtained through photo-trapping and the records of porcupine and anteater through reports from local inhabitants. The golden opossum was recorded in a fragment of tropical evergreen forest, while the records of the other two species occurred in agricultural areas, but close (, Presentamos registros notables de tlacuache dorado (Caluromys derbianus), oso hormiguero (Tamandua mexicana) y puerco espín (Coendou mexicanus), tres especies crípticas, de hábitos arborícolas consideradas amenazadas en México, cuya presencia en Oaxaca es histórica o escasa. El registro de tlacuache dorado se obtuvo a través de fototrampeo y los registros de puerco espín y oso hormiguero por medio de reportes de habitantes locales. El tlacuache dorado fue registrado en un fragmento de bosque tropical perennifolio, mientras que los registros de las otras dos especies ocurrieron en áreas agrícolas, pero cerca (

RESUMEN El atropellamiento de las especies silvestres es una de las principales causales de la mortalidad para estos animales, disminuyendo drásticamente su población. Se recibe una zarigüeya (Didelphis marsupialis) en la clínica veterinaria de la Universidad Remington de Medellín - Antioquia, con historial de politraumatismo reciente por atropellamiento con signos evidentes de dolor, múltiples lesiones lacerantes y abrasivas en la región craneal, torácica y coxal, el paciente inicia manejo médico farmacológico, fluidoterapia y es hospitalizado; debido a la gravedad de las lesiones el animal muere y se decide realizar un estudio radiológico ortogonal (vistas laterales y ventro dorsales de cráneo, tórax y abdomen, laterales de esqueleto apendicular) en el cual se observa fractura en tallo verde de la rama horizontal mandibular izquierda, en el ángulo mandibular izquierdo se evidencia fractura oblicua completa, en la porción del hueso maxilar izquierdo se observa una fractura longitudinal levemente desplazada. ABSTRACT The death by vehicular collision is one of the main causes of death in wildlife, drastically affecting the population number of several species. A Zarigueya (didelphis marsupialis) is received in the veterinary clinic of the Remington University in Medellín - Antioquia, with a recent history of multiple trauma with obvious signs of pain, multiple laceration and abrasive lesions in the cranial, thoracic and coxal regions. The patient starts medical pharmacological management, fluid therapy and is hospitalized; past few hours the patient died due to the severity of the lesions. It is decided to perform an orthogonal radiological study (lateral and ventro - lateral views of the skull, thorax and abdomen, laterals of the appendicular skeleton) in which a fracture is observed in the green stem of the horizontal left mandibular branch, in the left mandibular angle a complete oblique fracture is observed and in the left maxillary bone there is a slightly displaced longitudinal fracture.

Introduction: The opossum Didelphis virginiana (Kerr 1792) is one of the eight species of marsupials that live in the northern region of America and is widely distributed in Mexico. There is a large literature in North America of studies on this species, including its ectoparasites. But in Mexico studies are scarce, and so we decided to investigate the opossum ectoparasite species richness in a suburban landscape in Queretaro, Mexico. Methods: During January to May of 2010, we used 12 tomahawk traps to capture opossums. Each animal was immobilized with tiletilamina, and during recumbence we examined the opossums for ectoparasites. Fleas were collected in vials with 70% alcohol, then dehydrataded in 100% alcohol, and clarified with lactic acid for further identification. Results: We found four flea species on the trapped opossums ( n = 26), 14 males, 12 females. The species were Ctenocephalides felis, Euhoplopsyllus glacialis affinnis , Polygenis martinezbaezi and Polygenis sp. Two of these species are considered as new records for this marsupial host in Mexico, although these species have been recorded previously in this species in the United States and in other marsupial species in Mexico. Discussion: These fleas are new records for the Mexican opossum parasite fauna. This study, although initially didactic, reveals relevant information about the flea species richness on opossums in fragmented habitats in a suburban landscape in Queretaro. Because fleas have potential as disease and parasite vectors, this new information may be helpful in assessing their effects on human and wildlife health.