Pulsatrix perspicillata pdf

You must be logged in to view your sighting details. Related taxa Highlight taxa in a checklist shown in red none American Ornithologists' Union 6th edition v. American Ornithologists' Union 6th edition : Spectacled Owl Pulsatrix perspicillata [version 1]. American Ornithologists' Union 6th edition incl. American Ornithologists' Union 7th edition : Spectacled Owl Pulsatrix perspicillata [version 1]. American Ornithologists' Union 7th edition incl.

Avibase taxonomic concepts current : Spectacled or Short-browed Owl Pulsatrix [perspicillata or pulsatrix]. Birdlife checklist version Spectacled Owl Pulsatrix perspicillata [version 1]. Birdlife checklist version 05 Jun : Spectacled Owl Pulsatrix perspicillata [version 1]. Birdlife checklist version Birdlife checklist version 06 Nov : Spectacled Owl Pulsatrix perspicillata [version 1].

Birdlife checklist version 07 Jul : Spectacled Owl Pulsatrix perspicillata [version 1]. Birdlife checklist version 08 Oct : Spectacled Owl Pulsatrix perspicillata [version 1]. Birdlife checklist version 09 Dec : Spectacled Owl Pulsatrix perspicillata [version 1].

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Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use. Taphonomic investigations of Smithsonian Herpetological Information Service 1 Paleobiology 5: Mole, R. Biological notes upon some dos Santos-Costa, M. Natural history of snakes from Floresta Nacional of the species recorded from the island. Herpetology Notes Zoological Society of London Olson, R.

Brief notes on two Amazonian lizards. Bulletin Evans, S. The skull of lizards and tuatara, pp. In: Gans, C. Lizards: Windows to the Evolution of the Reptilia. Volume Morphology H: The skull of of Diversity. Society for the Study of Amphibians and Rieppel, O.

Miniaturization of the lizard skull: its Reptiles, Ithaca, NY. In: Ferrer P. The Zoological Society of London, en Venezuela. Memoria Academic Press, London, UK. Gamble, T. Russell, A. Thecadactylus T. Into the light: diurnality has evolved multiple times Catalogue of American Amphibians and Reptiles We considered the MAX6db an objective measure of the maximum frequency of the nal morphology of adult Spectacled Owls observed owl calls.

The presumed characters al- low the Peak Frequency. We considered the MIN6db an lowing subspecies discrimination were the eyebrow objective measure of the minimum frequency of the calls.

The adults the analysis. Note duration was measured for every note. Interval duration and yellow eyes. In contrast, the pulsatrix race has was measured for intervals between all notes. The data set followed a normal dis- tinctly broken at the center and brownish-yellow tribution and homogeneity of variances. These five characteristics together indicated among note durations and differences among intervals that the Spectacled Owls at Guaycolec were not between notes within a call.

The subspecies P. External morphological features of adult P. Owls at the study site were described by observing individuals at their day roost sites. Black indistinctly rimmed lighter. Eyebrows Long and white Short, creamy-buff, Pure white, extending Long and white.

Lores and malar White Not pure white. Pale White White streaks buffy? Throat White, forming Pale buffy. White, extending to the White semi-collar. Crown and nape Uniform blackish-brown, Rather plain earth- Blackish Black, darker than much darker than brown, concolorous back. Upperparts Uniform dark brown, Earth-brown.

Grayish-black, as dark Uniform brown. Flight and tail Dark brown, barred Barred light and dark? Barred feathers with lighter barring on tail grey-brown. Breast band Brown Brown, indistinctly? Cinnamon-brown, broken in center. Lower breast and Uniform pale yellowish- Clear yellowish-brown.

Moderately deep tawny Cinnamon. Eyes Orange-yellow Brownish orange-yellow? Feet and toes Almost fully feathered Tarsi feathered pale Toes feathered to near Tarsi feathered creamy-buff.

Con- in an acceleration of the call. Three zones Guaycolec owls fully matched every diagnostic fea- can be distinguished based on the spatial arrange- ture. At the study site, we heard calls Records 1—8 were located along the basin of the from adult Spectacled Owls throughout the year. Paraguay River, records 9—20 were in the semi-de- All calls contained 10 notes Fig.

Peak Frequen- ciduous and Araucaria forests of southeastern Bra- cy was Comparing Call duration was 1. There was a reduction in note duration Fig. Spectrum plot a and sonogram b of a vocalization of an adult Spectacled Owl Pulsatrix perspicillata recorded at Estancia Guaycolec, Formosa, Argentina. Records 1—4 includ- ing our study, record 3 had geographic continuity with P.

The owls observed at Estancia Guaycolec from — were resident and repro- duced at the study site. Based on comparison of the external morphology of the Spectacled Owls ob- served with that of the three subspecies within geo- graphic proximity Table 1 , we concluded that the owls at Estancia Guaycolec belong to the P.

From the spatial distribution of records south of 20uS, we identified a series of localities along the basin of the Paraguay River. We hypothesize that the Paraguay River and its tributaries function as Figure 4.

Mean and standard deviation for note duration a riparian corridor that provides a continuum of a and interval duration b of six vocalizations of an forest habitat from the well-known range of this spe- adult Spectacled Owl Pulsatrix perspicillata recorded at cies in Paraguay to the southern localities in For- Estancia Guaycolec, Formosa, Argentina.

Further evidence under- a riparian corridor for the species dispersion. Con- scoring the proposed presence of P. Company, particularly M. Arauz and J. Adams, for allowing us to work within Ea. Given that E. Coconier, O.