Browsing by Autor "W. Sergio Pantoja"

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    Firewood-gatherer Anumbius annumbi: a new species and genus in Bolivia
    (British Ornithologists' Club, 2025) W. Sergio Pantoja
    Firewood gatherer Anumbius annumbi is a furnariid endemic to southern South America that occurs in grassland, agricultural areas, shrubland, savanna, and open woodland. I report the first record of the species for Bolivia in Parque Nacional y Área Natural de Manejo Integrado Otuquis in September 2024.
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    New information on bird distribution in Bolivia
    (British Ornithologists' Club, 2025) Miguel Montenegro-Avila; Nicole A. Avalos; J. Luis Martínez; W. Sergio Pantoja; Romer S. Miserendino; Dirk Dekker; Tini Wijpkema; Jacob T. Wijpkema; Carlos A. Villarroel; Alejandro Alfredo Mendoza Espinoza
    Recent advances in our understanding of the Bolivian avifauna have been substantial; 1,452 species are now known for the country. This manuscript presents a compilation of records made between 2005 and the present, including records for 27 species that contribute to our understanding of elevational and geographic distributions and status of birds in Bolivia. Among the most noteworthy discoveries are further records of the only recently recorded Coscoroba Swan Coscoroba coscoroba, the first record of the globally threatened Horned Curassow Pauxi unicornis in Santa Cruz for more than a decade, evidence that Scaled Dove Columbina squamata might be becoming established in the east of the country, the second record of South American Painted Snipe Nycticryphes semicollaris in Bolivia, the fifth and sixth Bolivian records of Common Tern Sterna hirundo and the third national record of Purple-throated Cotinga Porphyrolaema porphyrolaema. These findings underscore the need for sustained research and documentation of Bolivia's avifauna.
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    Nuevos registros de aves en Vallegrande, Santa Cruz, Bolivia
    (2022) Miguel Montenegro-Ávila; W. Sergio Pantoja; Anahi C. Paca-Condori; Paola Velásquez‐Noriega
    In Bolivia there are many information gaps on bird biodiversity, with the development of new research and exploration of sites in recent years, new records and expansion of distribution of many bird species have been found. During the bird surveys in the Huertamayo locality of the Vallegrande province, we recorded four species of birds that are little known for the department of Santa Cruz, where the distribution of the Leque Leque Andino (or Tero Serrano; Vanellus resplendens), Yaka Yaka (or Andean Woodpecker; Colaptes rupicola), Plumbian Fringe (or Plumbian Yal; Geopizopsis unicolor) in the department, and the first record of Grey-bellied Muleteer (or Brown Gaucho; Agriornis micropterus) was reported, these reports contribute to the knowledge of the distribution of the bird life in the country.
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    Posible ampliación del hábitat de Asio stygius (Strigiformes: Strigidae) en Bolivia
    (Fundación Miguel Lillo, 2025) Sebastián Gutiérrez‐Cruz; Nicole Adriana Avalos Saavedra; W. Sergio Pantoja; Luis Alejandro Gálvez; Miguel Montenegro-Ávila
    Este trabajo documenta la expansión de la distribución del búho estigio (Asio stygius) en Bolivia, aportando tres nuevos registros en los departamentos de Tarija y Santa Cruz, incluyendo áreas urbanas. Durante la revisión de especímenes en el Museo de Historia Natural Noel Kempff Mercado, se destaca el ejemplar MNKM.AV 6263, que presenta una coloración similar a la subespecie A. s. barberoi, conocida por su especialización en el Chaco. Sin embargo, sus medidas difieren de los estándares reportados para esta subespecie, sugiriendo posibles variaciones o adaptaciones locales. En contraste, el resto de los ejemplares examinados muestran características típicas de la subespecie A. s. stygius, distribuidos en diferentes ecosistemas bolivianos. Los nuevos registros también sugieren una mayor adaptabilidad de A. stygius a hábitats perturbados y expanden su presencia hacia el sur del país, conectando potenciales poblaciones desde el norte de Argentina. Los resultados destacan la necesidad de un monitoreo constante para confirmar la presencia y variabilidad de estas subespecies, mejorando el conocimiento sobre la distribución y ecología de esta especie en Bolivia.
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    Registros notables del Flamenco Chileno (<i>Phoenicopterus chilensis</i>) en el departamento de Santa Cruz, Bolivia
    (2023) J. Luis Martínez; Romer S. Miserendino; W. Sergio Pantoja; Nicole A. Avalos; Miguel Montenegro-Ávila; Anahi C. Paca-Condori
    In Bolivia, the Chilean Flamingo, Tokoko or Parina (Phoenicopterus chilensis), is one of the most common and widely distributed flamingos. It is present in the departments of La Paz, Oruro, Potosí, Tarija and Cochabamba. In 2016 and 2022, we found three individuals in Laguna Pirirenda and Laguna Tatarenda, located in the Chaco Serrano ecoregion of the department of Santa Cruz. We found one adult and couple (male and female) in each lagoon, respectively. These are new reports for the species in the department of Santa Cruz and the Chaco Serrano ecoregion; thus, these observations expand this species distribution in the country.