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Important Bird Areas Americas. Priority Sites for Biodiversity Conservation
Local predation pressure predicts the strength of mobbing responses in tropical birds
Results support the ecological constraints model and provide strong evidence that intense predation pressure increases the expression of cooperative mobbing in tropical birds.
A test of the Acoustic Adaptation Hypothesis in three types of tropical forest: degradation of male and female Rufous-and-white Wren songs
A significant difference is shown between transmission characteristics of both male and female song elements across the three habitats, indicating that sounds transmit differently through different types of tropical Forest, and reveals some sex differences in transmission properties.
Transmission characteristics of solo songs and duets in a neotropical thicket habitat specialist bird
It is found that solo and duet songs degraded to below-detectable levels in less than a typical territory's diameter, suggesting that white-eared ground-sparrows Melozone leucotis has not experienced strong selection for long-distance communication.
The differences in transmission properties of two bird calls show relation to their specific functions.
- P. Piza, L. Sandoval
- Computer Science, MedicineThe Journal of the Acoustical Society of America
- 15 December 2016
The authors tested the transmission properties of two call types both produced by white-eared ground-sparrows Melozone leucotis; these calls vary in frequency and duration, suggesting that they may transmit at different distances and evidence how the selection of these calls facilitates the communication over different distances.
Effect of urbanization on the avifauna in a tropical metropolitan area
The rapid and unplanned expansion of urban areas is a common pattern in neotropical developing countries. Urbanization has eliminated or drastically altered large areas of natural habitats used by…
Characteristics of male Spot-bellied Bobwhite (Colinus leucopogon) song during territory establishment
It is found that many males in the Spot-bellied Bobwhite (Colinus leucopogon) have a unique set of song features, and the results suggest that female mate choice in this species is based in part on male song traits.
Individual Distinctiveness in the Fine Structural Features and Repertoire Characteristics of the Songs of White-eared Ground-sparrows
Communication between social animals is often more effective when signals facilitate individual recognition. Two critical requirements for individual recognition are the occurrence of characteristics…
BREEDING BIOLOGY OF WHITE-EARED GROUND-SPARROWS (MELOZONE LEUCOTIS), WITH A DESCRIPTION OF A NEW NEST TYPE
La primera descripcion detallada de la biologia reproductiva del Cuatro-ojos de Cabeza-negra (Melozone leucotis), una especie of paseriforme Neotropical that habita tacotales en Centroamerica muy poco estudiada, es revelada.
Variation and possible function of egg sac coloration in spiders
- G. Barrantes, L. Sandoval, Catalina Sánchez-Quirós, Pierre-Paul Bitton, S. Doucet
- 15 November 2013
In most cases, the spectral characteristics of the egg sacs seem to reduce their conspicuousness against the background and in those cases in which the coloration does not reduce the contrast in relation to the background, the low environmental light available may help to camouflage the Egg sacs.