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The mystery of how spiders extract food without masticating prey
(2006)
Standard accounts of how spiders obtain food without masticating their prey are probably largely wrong. Species in the families Uloboridae, Thomisidae, Araneidae and Theridiidae do not inject digestive fluid into the prey’s ...
Extreme Behavioral Adjustments by an Orb‐Web Spider to Restricted Spaces
(2012)
Adaptive flexibility in response to environmental variation is often advantageous and occurs in many types of traits in many species. Although the basic designs of the orb webs of a given species are relatively uniform, ...
Effect of fragmentation on the Costa Rican dry forest avifauna
(2016)
Deforestation and changes in land use have reduced the tropical dry forest to isolated forest patches in northwestern Costa Rica. We examined the effect of patch area and length of the dry season on nestedness of the entire ...
Natural History and Larval Behavior of the parasitoid Zatypota petronae (Hymenoptera: Ichneumonidae)
(2007)
The koinobiont ectoparasitoid Zatypota petronae Gauld (Ichneumonidae) parasitizes medium-sized immatures of the cobweb spider Theridion evexum Keyserling (Theridiidae). Zatypota petronae apparently attacks the spider inside ...
Birds in Coastal and Marine Environments
(Springer Science & Business Media, 2009)
In Costa Rican coastal and marine environments (e.g., estuaries, mud- flats, islands, open ocean) 96 bird species have been recorded, 11% of the total avifauna in the country. This high diversity is primarily explained by ...
Do different methods yield equivalent estimations of brain size in birds?
(2020-08-31)
The ratio of brain size to body size (relative brain size) is often used as a measure of relative investment in the brain in ecological and evolutionary studies on a wide range of animal groups. In birds, a variety of ...
Characteristics of male Spot-bellied Bobwhite (Colinus leucopogon) song during territory establishment
(2012)
In song-learning birds, male song shows a large inter-individual variation that frequently plays an important role in intra- and inter-sexual selection. In other bird groups, such as Galliformes, song learning is absent, ...
Urban noise influences vocalization structure in the House Wren Troglodytes aedon
(2013)
Urban habitats are noisy and constrain acoustic communication in birds. We analysed the effect of anthropogenic noise on the vocalization characteristics of House Wrens Troglodytes aedon at two sites with different noise ...
Hidrocarburos cuticulares: su potencial como estímulo para el reconocimiento de parentela en dos arañas subsociales anelosimus (Araneae: Theridiidae) y patrones de fijación de hilos de seda en la araña subsocial Anelosimus baeza (Araneae: Theridiidae)
(2019-09-27)
El reconocimiento de parentela en grupos sociales de artrópodos puede ocurrir por diferentes tipos
de estímulos, como por ejemplo los compuestos excretados de la cutícula. Un rasgo posiblemente ancestral
de las arañas ...
Description of the acoustical interaction and synchronization between duetters of the Large-footed Finch (Pezopetes capitalis)
(2017)
Duets are highly coordinated acoustical displays produced by two individuals. Studying the structure of duet songs and its causes is essential to understand the ecological role and evolution of this form of communication. ...