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San Pedro, Argentina

Klavins J.,Final de 1 de Mayo | Merida E.,Proyecto Selva de Pino Parana | Villafane N.A.,Final de 1 de Mayo
Revista Brasileira de Ornitologia | Year: 2014

We describe the second record of the White-throated Woodcreeper Xiphocolaptes albicollis anting with a millipede in South America, and the first such record for Argentina. The woodcreeper rubbed the millipede against its wings while perched at the base of a tree and on the ground. The anting seemed to not seriously injure the millipede, identified as a species of the Rhinocricidae (Spirobolida). Source

Kirwan G.M.,74 Waddington Street | Bodrati A.,Proyecto Selva de Pino Parana | Bodrati A.,Maimonides University | Cockle K.,Proyecto Selva de Pino Parana | And 2 more authors.
Ornitologia Neotropical | Year: 2010

There are few data concerning the breeding biology of the Near Threatened Atlantic Forest endemic, the Bay-ringed Tyrannulet Phylloscartes sylviolus. Here, we describe four nests from eastern Paraguay, northeast Argentina and southeast Brazil, all found at various stages of construction. All four nests can be described as closed/globular/lateral, or perhaps closed/retort/pensile, according to the recent classification scheme for nests of Neotropical birds. Nests were mostly green, constructed of live moss, seed down, other plant fibers, spider webs, and lichen. Both adults contributed to nest-building. The single egg we observed was clean white. Recent molecular studies have found strong support for a close relationship between Phylloscartes and the genus Pogonotriccus, and have even suggested that additional sampling might support their reunification; a recent study of nest architecture, in contrast, proposes that Phylloscartes is more similar to Leptopogon and Mionectes. Our review of nest architecture data for these genera suggests a much greater degree of plasticity than has heretofore been recognized, at least within Phylloscartes, and striking similarities between the nests of Phylloscartes and Pogonotriccus. Other genera, especially Mionectes and Leptopogon, build obviously different types of nests. The system for categorizing nests of Neotropical birds devised by Simon & Pacheco (2005), while not always perfect, merits greater use by ornithologists describing nests, in order to facilitate future comparisons. Accepted 8 August 2010. © The Neotropical Ornithological Society. Source

Bodrati A.,Proyecto Selva de Pino Parana | Cockle K.L.,Proyecto Selva de Pino Parana | Cockle K.L.,University of British Columbia | Di Sallo F.G.,Proyecto Selva de Pino Parana
Ornitologia Neotropical | Year: 2014

Little is known of the natural history and reproduction of the antthrushes (family Formicariidae). Here we provide new information on the breeding biology of the Short-tailed Antthrush (Chamaeza campanisona) in Misiones province, Argentina. We found 13 nests from September to December in primary Atlantic forest, in tree cavities produced by wood decay (not excavated by woodpeckers). The cavities were 5.4 ± 0.8 m (mean ± SE) above the ground (range = 1.7-9.6 m); their entrances were at least 4 cm in diameter; and their vertical depth was 111 ± 27 cm (range = 32-312 cm). Before eggs were laid, both adults used leaves to cover the cavity floor or construct a platform mid-cavity. The 2-3 white eggs were incubated by both adults, with bouts lasting 119 ± 11 min (range = 82-145 min). From observations at two nests, we estimate the incubation period at 18 days. Adults brought leaves when they arrived to incubate, forming a wall of green leaves around their eggs. Nestlings were covered in violet-tinted grey down when they hatched, they had open eyes on day 10, and pin feathers were opening on their bodies and wings on day 16. Both adults fed the nestlings arthropods (51% caterpillars), taking on average 2.6 ± 0.2 prey items at a time (range = 1-7). As the nestling period progressed, the adults visited the nest less frequently but brought more prey items per visit. They removed fecal sacs beginning on day 8. Each adult used a different sector of the forest and had its own established route to arrive at the nest. Nestlings fledged after 22-23 days, making a short flight when an adult arrived at the cavity. The fledglings looked like adults but had shorter tails; shorter, lighter-colored bill; and a remnant of the yellow gape flanges. Several aspects of nesting were similar to the Black-faced Antthrush (Formicarius analis), but more studies are needed to determine whether these patterns can be generalized to the rest of the family. Accepted 18 December 2014. © 2014 The Neotropical Ornithological Society. Source

Cockle K.L.,Proyecto Selva de Pino Parana | Cockle K.L.,Louisiana State University | Cockle K.L.,University of British Columbia | Bodrati A.,Proyecto Selva de Pino Parana
Wilson Journal of Ornithology | Year: 2013

We report on the breeding biology of the White-throated Woodcreeper (Xiphocolaptes albicollis), a species endemic to the Atlantic forest of South America, based on 16 nesting attempts in 11 cavities (9 natural tree cavities and 2 nest boxes) in Misiones, northeastern Argentina. Natural cavities were 3.3-8.3 cm in diameter and 46-103 cm in depth, and generated by decay processes (not woodpeckers) at heights of 3-17 m in live trees 29-106 cm in diameter at breast height. White-throated Woodcreepers laid 2-4 eggs on alternate days, on a bed comprised of bark flakes, leaf fragments and seed pods. Incubation bouts (n = 3) were more than 1 hr 40 mins. Incubation lasted 17 days and the nestling period 18-22 days, shorter than the congeneric Great Rufous Woodcreeper (Xiphocolaptes major). Both adults brought nest material, incubated the eggs, fed the nestlings, and removed fecal sacs; however, we suspect that the male contributed more to fecal sac removal. Both adults roosted in the cavity a few nights before eggs were laid, but only one adult did so during the incubation and nestling periods. Nestlings were fed arthropods and small vertebrates at an average rate of 3 visits/hr with no change in delivery rate over the nestling period. Adults defended their nests from four bird species but shared one cavity with a roosting female Helmeted Woodpecker (Dryocopus galeatus) throughout their incubation period. We confirm that the White-throated Woodcreeper exhibits biparental care like the Great Rufous Woodcreeper, the Dendrocolaptes and the Lepidocolaptes, but in contrast to Sittasomus, Dendrocincla and Xiphorhynchus. We recommend studies with banded individuals to determine the relative contribution of each parent. © 2013 by the Wilson Ornithological Society. Source

Bodrati A.,Proyecto Selva de Pino Parana | Bodrati A.,Maimonides University | Cockle K.,Proyecto Selva de Pino Parana | Cockle K.,Maimonides University | And 6 more authors.
Cotinga | Year: 2010

Among the most diverse and threatened regions in the world is the Atlantic Forest of south-east Brazil, eastern Paraguay and the province of Misiones in Argentina. Only c.8-10% of this forest remains, nearly all of it degraded by selective logging. During 341 days in 1997-2010, we studied the avifauna of one of the few remaining patches of mature Atlantic Forest in Argentina, Cruce Caballero Provincial Park. In and around this 600-ha park we identified 312 species of birds in 53 families, 280 of them documented by tape-recordings or photographs. Of these species, 19 are globally threatened, 50 threatened in Argentina, and 73 endemic to the Atlantic Forest. The park conserves key populations of Helmeted Woodpecker Dryocopus galeatus, Araucaria Tit-Spinetail Leptasthenura setaria, Bay-ringed Tyrannulet Phylloscartes sylviolus and São Paulo Tyrannulet P. paulista. Other threatened species, including White-bearded Antshrike Biatas nigropectus, Canebrake Groundcreeper Clibanornis dendrocolaptoides and Vinaceous Amazon Amazona vinacea are more common outside the park in the mosaic of small farms and forest fragments between San Pedro and Santa Rosa. Black-fronted Piping Guan Pipile jacutinga appears to be extirpated from the park and Blue-winged Macaw Primolius maracana is apparently extirpated from Argentina. We did not record Bare-throated Bellbird Procnias nudicollis and we consider it hypothetical for the park. The mass flowering and death of takuapi bamboo Merostachys claussenii in 2004-07 generated major changes in the understorey vegetation, resulting in changes in the presence and abundance of many species. To conserve the avifauna of this small Atlantic Forest park it is of key importance to continue to improve environmental education in the surrounding farmlands. Isolation of the park can be avoided by adding neighbouring lots that still support native forest, and by providing small-holder farmers with technical and financial support to promote sustainable crops such as Araucaria angustifolia, rather than the current model of slash-and-burn tobacco farming. Source

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