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| Puna ibis | |
|---|---|
| Name | Puna ibis |
| Genus | Plegadis |
| Species | ridgwayi |
| Authority | (Allen, 1876) |
Puna ibis is a medium-sized, long-legged wading bird of the genus Plegadis found in high Andean wetlands. It inhabits puna grassland and altiplano lakes across several South American countries and is recognized for its curved bill and gregarious behavior. The species is of interest to ornithologists, conservationists, and indigenous communities in the Andean region.
The species was described by Joel Asaph Allen in 1876 and placed in the genus Plegadis alongside Glossy ibis and Hadada ibis. Early taxonomic treatments referenced comparisons with taxa discussed by Charles Darwin and catalogues from institutions such as the American Museum of Natural History and the British Museum (Natural History). Molecular phylogenetic studies published in journals like Molecular Phylogenetics and Evolution and conducted by researchers affiliated with Smithsonian Institution and Max Planck Society have clarified relationships within Threskiornithidae, often comparing mitochondrial sequences with data sets used in projects by the International Union for Conservation of Nature specialists. Regional checklists compiled by organizations such as BirdLife International and national ornithological societies (for example, the Sociedad Chilena de Ornitología and Asociación Colombiana de Ornitología) treat it as a distinct species with affinities to Old World ibises discussed in comparative works by John Gould and later field guides by James Clements and Howard and Moore.
Adults display a slender, decurved bill and relatively uniform brownish plumage with iridescent highlights noted in field guides by Ridgway and illustrated plates from the Royal Society collections. Standard measurements referenced in identification keys from the Handbook of the Birds of the World include wing, bill, and tarsus lengths comparable to those listed for Scarlet ibis and African sacred ibis in museum specimen catalogues curated at the Natural History Museum, London. Juveniles resemble adults but may show paler feather edges as recorded in banding studies by teams at Pontificia Universidad Católica del Perú and the Universidad Nacional de San Agustín (Arequipa). Sexual dimorphism is subtle; researchers associated with Cornell Lab of Ornithology note overlapping morphometrics between males and females in their regional atlases.
The species occupies high-altitude wetlands across the Andean altiplano in countries including Peru, Bolivia, Chile, Argentina, and parts of Ecuador. Its range corresponds with puna ecosystems described in biogeographic surveys by the International Geosphere-Biosphere Programme and national biodiversity inventories such as Peru’s Ministerio del Ambiente (Perú). Typical habitats include saline and freshwater lakes, peat bogs, and marshes near settlements and archaeological sites like those documented around Lake Titicaca and the Salar de Uyuni. Elevational limits recorded in regional fieldwork extend between montane puna zones and high Andean plateaus referenced in studies published through the Andean Geology journal.
Puna ibis is gregarious, forming flocks that feed and roost in loose colonies; flock dynamics have been compared in ethological literature alongside species observed by researchers at Smithsonian Tropical Research Institute and noted in expedition reports by the Royal Geographical Society. Seasonal movements appear to be altitudinal rather than long-distance migrations, a pattern analyzed in tracking studies using telemetry technology supplied by collaborators at Max Planck Institute for Ornithology and logged in datasets maintained by Movebank. Interactions with sympatric waterbirds—such as Andean goose and Andean coot—are documented in wetland community surveys coordinated with Wetlands International and national conservation agencies.
Breeding occurs in colonies on islands, reedbeds, or shores; nesting phenology aligns with austral spring and summer periods, as reported by field teams from Universidad de Chile and researchers publishing in The Condor. Nests are constructed from local vegetation similar to descriptions for related ibises in guides by Tony Soper and monitored in avian ecology projects supported by Consejo Nacional de Ciencia y Tecnología (CONICYT) grants. Clutch sizes, incubation periods, and fledging success have been documented in longitudinal studies by university researchers collaborating with the Peruvian Society for Bird Study and regional ringing programs coordinated with the Asociación Ornitológica del Plata.
Foraging behavior involves probing soft substrates and shallow water with the curved bill; prey items documented in stomach-content analyses and observational studies include aquatic invertebrates, insect larvae, molluscs, and small vertebrates comparable to diets reported for Eurasian curlew and Wood ibis in comparative trophic studies. Foraging ecology has been examined in wetland surveys led by the International Water Management Institute and in trophic web analyses published by researchers at Universidad Mayor de San Andrés.
Assessment of population trends has been undertaken by BirdLife International and national red listing authorities; threats include wetland drainage, mineral extraction around high Andean salt flats, disturbance from livestock and infrastructure projects promoted by agencies like Agencia de Promoción de la Inversión Privada and impacts from climate variability reported by the Intergovernmental Panel on Climate Change. Conservation measures have been proposed in management plans coordinated with Ramsar Convention Secretariat frameworks and implemented locally through protected areas such as national parks administered by ministries like Servicio Nacional de Áreas Naturales Protegidas por el Estado and community-based initiatives supported by International Union for Conservation of Nature partners. Continued monitoring by ornithological societies and universities is recommended to inform adaptive conservation action.
Category:Threskiornithidae Category:Birds of the Andes