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Hub thread removal behaviour in the orb weaver Leucauge mariana (Araneae: Tetragnathidae)
(2020-11-05)
Many orb-weaving spiders break the central lines of the hub at the end of web construction. Nevertheless, very little is known of how spiders break these lines and whether this behaviour differs among taxa. Here, we describe ...
Effect of urbanization on the avifauna in a tropica metropolitan area
(2011)
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 the rich neotropical ...
Reproducción, uso de habitat e historia natural del Capulinero negro y amarillo (Phainoptila melanoxantha), una especie endémica de las tierras altas de Costa Rica y oeste de Panamá.
REPRODUCTION, HABITAT USE, AND NATURAL HISTORY OF THE BLACK-AND-YELLOW SILKY-FLYCATCHER (PHAINOPTILA MELANOXANTHA), AN ENDEMIC BIRD OF THE WESTERN PANAMA-COSTA RICAN HIGHLANDS
(2002)
Estudiamos la abundancia relativa, distribución geográfica, dieta y reproducción del Capulinero negro y amarillo (Phainoptila melanoxantha), una especie endémica a las tierras altas de Costa Rica y oeste de Panamá. A lo ...
Loss of cheliceral clasping in Leucauge sp. (Araneae, Tetragnathidae)
(2015)
In male spiders, genitalia, sexual behaviour and secondary sex morphology tend to diverge rapidly across species, presumably as a result of sexual selection. In the three Leucauge species for which pre- and copulatory ...
Canines as a measuring tool for leaf tent construction in Dermanura watsoni
(2013)
Many animals are capable of constructing structures to modify the environment for their own benefit. The design of these structures requires animals to perceive dimensions. However, how animals take measurements to achieve ...
Cues guiding uloborid construction behavior support orb web monophyly
(2015)
Behavior can provide useful traits for testing phylogenetic hypotheses, and some details of orb web construction behavior have been especially useful in characterizing higher-level groups in spiders. The cues used to guide ...
Latrodectism in Costa Rica
(2017)
Se reporta un accidente causado por la araña Latrodectus geometricus, incluida en el grupo conocido como “viudas negras”, en Costa Rica. El accidente le ocurrió a una mujer de 27 años vecina de la ciudad de Cartago, en su ...
Functional aspects of genital differences in Leucauge argyra and L. mariana (Araneae: Tetragnathidae)
(2013)
Morphological studies have documented the tendency for male genitalia to diverge rapidly compared to other body parts in many animal groups, including spiders. But documentation of how differences in genital structures of ...
Observations on the breeding behaviour of Snowy Cotinga
(2016)
Tres nidos de la Cotinga Nivosa Carpodectes nitidus muestran un diseño muy simple, que consiste en una plataforma construida de ramitas y zarcillos, similar al descrito previamente para esta especie y para otras cotingas. ...
Male song variation of Green Violetear (Colibri thalassinus) in the Talamanca Mountain Range, Costa Rica
(2008)
We studied variation in acoustic and temporal characteristics of the static male song of the Green Violetear (Colibri thalassinus) in a single population in Costa Rica. The static song of 19 males was extremely variable. ...