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Now showing items 11-20 of 81
Seed dissemination by frugivorous birds from forest fragments to adjacent pastures on the western slope of Volcán Barva, Costa Rica
(2002)
Logging, cattle raising, and agricultural activities have caused the destruction of most forested áreas in Costa Rica. In some middle and highlands the abrupt topography delayed the complete destruction of montane forest. ...
Tie them up tight: wrapping by Philoponella vicinaspiders breaks, compresses and sometimes kills their prey
(2006)
We show that uloborid spiders, which lack the poison glands typical of nearly all other spiders, employ thousands of wrapping movements with their hind legs and up to hundreds of meters of silk line to make a shroud that ...
Viscid globules in webs of the spider achaearanea tesselata (araneae: theridiidae)
(2006)
We describe the presence and dimensions of viscid globules in both the sheet and tangle portions of the webs of Achaearanea tesselata (Keyserling 1884). We found viscid globules in all sheets and tangles of the webs examined. ...
Detritus camouflage in webs of Helvibis longicauda (Araneae: Theridiidae)
(2007)
Adult females of Helvibis longicauda accumulated tiny pieces of vegetation in the mesh of their webs. The amount of debris accumulated was much greater in webs of spiders with either egg sacs, spiderlings or juveniles than ...
Distribución, ecología y conservacion de la avifauna de la cuenca del río Savergre, Costa Rica
(2004)
Presentamos en este trabajo información sobre la riqueza, distribución y patrones de endemismo de la cuenca del río Savegre. Adicionalmente, incluimos información general sobre la dieta, condición (ej., residente o migratoria) ...
Mating and aggressive behaviour of Brachyrhaphis olomina (Cyprinodontiformes: Poeciliidae)
(2017)
Despite the increasing interest in the use of intro-mittent male genitalia and coercive mating behaviour in poeciliids, detailed studies of the mating behaviour of most species in this family are lacking. We describe here ...
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 ...
Feeding by Philoponella vicina (Araneae, Uloboridae) and how uloborid spiders lost their venom glands
(2006)
Feeding by uloborid spiders is unusual in several respects: cheliceral venom glands are absent; prey wrapping is extensive (up to several hundred metres of silk line) and severely compresses the prey; the spider’s mouthparts ...
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. ...
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 ...