Santa Rosa, Paraguay
Santa Rosa, Paraguay

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Distraction displays or paratreptic behaviours are nest protection behaviours designed to lead predators away from an active nest. The reason for the widespread presence of terrestrial distraction displays in the largely arboreal Parulidae has been the subject of much debate, and a terrestrial or semi-terrestrial ancestor has been postulated to explain it. Recent phylogenetic analyses provide some support for this theory, but distraction displays in the Parulidae remain poorly documented and are often inaccurately and abruptly dismissed with misapplied terms such as “injury-feigning”. An observation of distraction display in the southern azarae subspecies of the widespread Neotropical species, Golden-crowned Warbler Basileuterus culicivorus, showed that such behaviours are far more complex and multi-faceted than currently understood. The distraction display of this subspecies exhibits elements of injury-feigning, chick simulation, advertising and, perhaps, eccentric deportment. Given the possible ancestral origins of such behaviours, it is suggested that the careful documentation and description of such behaviours in Parulidae is warranted and that they may potentially assist in shedding light on the evolutionary history of the family. © 2017 Springer-Verlag Berlin Heidelberg and ISPA

Smith P.,Fauna Paraguay | Cacciali P.,Para La Tierra | Atkinson K.,Para La Tierra | Pheasey H.,Para La Tierra | Motte M.,Museo Nacional de Historia Natural del Paraguay
Check List | Year: 2012

New distributional data are provided for 12 species of amphibian in Departamento San Pedro, Paraguay. Records are from the Reserva Natural Laguna Blanca, a small private reserve located in an area of transition from Atlantic Forest to Cerrado-type habitats. The chronic under-sampling of amphibian populations in Paraguay is highlighted. © 2012 Check List and Authors.

Cacciali P.,Para La Tierra | Cacciali P.,Institute Investigacion Biologica del Paraguay | Smith P.,Para La Tierra | Kallberg A.,Para La Tierra | And 2 more authors.
Check List | Year: 2013

The first Paraguayan records of the poorly known xenodontine snake Lygophis paucidens are reported. Two male specimens were collected in a mosaic habitat of Campo Sucio and Cerrado sensu stricto in the Reserva Natural Laguna Blanca, Departamento San Pedro. This is the first record of this species outside of Brazil. © 2013 Check List and Authors.

Austin V.,Para La Tierra | Savary J.,Para La Tierra | Smith P.,Para La Tierra
Revista Brasileira de Ornitologia | Year: 2016

Nesting Burrowing Owls (Athene cunicularia) in the Cerrado of northeastern Paraguay were observed to show increased vigilance in response to Curl-crested Jay (Cyanocorax cristatellus) calls. To test whether this reaction was species specific, a playback experiment was conducted using jay calls, a native passerine and three exotic passerines, and responses of the owls to the recordings were measured. The results indicated that the owls responded with increased vigilance only to calls of the Curl-crested Jay. It is hypothesized that the interaction between the two species may be related to competition for dietary resources initiating a greater aggressive response in the diurnal jay due to its more limited foraging time, compared to the nocturnal and diurnal owls. The vigilant response of the owls may thus be related to avoidance of potentially costly aggressive interactions with jays. © 2016, Sociedade Brasileira de Ornitologia. All rights reserved.

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