Biología
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Variación en la actividad acústica de Hyalinobatrachium fleischmanni (Anura: Centrolenidae) en un ambiente urbano con diferentes niveles de ruido antropogénico
(2019)Acoustic signals produced by animals can be masked by natural or anthropogenic environmental noise. A high proportion of the current distribution of the glass-frog Hyalinobatrachium fleischmanni (Centrolenidae) overlaps ... -
Micrurus Nigrocinctus (Central America Coralsnake) Predation
(2019)Coral snakes and their mimics are rarely preyed upon by birds. Turquoise-browed Motmots and Great KisKadees, wich feed on snakes and other reptiles, avoid models with the patterns of coral snakes or their mimics. Howerver, ... -
Ramphocelus passerinii alimentando pichones de Turdus grayi y notas sobre la reproducción de otras especies de Ramphocelus
(2015)En esta nota presentamos observaciones de un Ramphocelus passerinii alimentando juveniles de Turdus grayi. Además, ampliamos los registros de la época reproductiva para Ramphocelus costaricensis y Ramphocelus carbo. Esta ... -
The differences in transmission properties of two bird calls show relation to their specific functions
(2016)When vocalizations transmit throughout the environment, attenuation and degradation may change the information of the signal; the loss of information is related to changes in both frequency and duration of vocalizations. ... -
The first record of an audible sound produced by a ghost moth, Phassus (Hepialidae) from Costa Rica
(2015)Sound production in lepidopteran adults has been reported in at least 13 families. The majority of these families produce ultrasonic sounds that are inaudible to humans. Here we report the first record of an audible sound ... -
Desarrollo de un sistema de modificación genética en caoba (Swietenia macrophylla King) mediante la evaluación de la expresión transitoria y estable del gen reportero GUS
(2023)La caoba (Swietenia macrophylla King) (Meliaceae) es una especie forestal muy valiosa y comercializada a nivel mundial, pero su sobreexplotación ocasionó que se convirtiera en una especie amenazada (Apéndice II, CITES). ... -
Anolis insignis (Decorated anole). Predation attempt
(2019)Two jays attacking an A. insignis on a liana 10 m above the ground. -
Frequency and synchronisation features of a highly overlapped duet changes according to the context
(2019)Territorial defence and maintaining contact are two hypotheses of duet functions. Nevertheless, the acoustic characteristics of duets in these contexts have been poorly quantified. This work aimed to compare the spectrotemporal ... -
Geographic variation in the duets of the Rufous-naped Wren (Campylorhynchus rufinucha) complex
(2020)Acoustic signals used in animal communication play a key role in mate attraction, species recognition, and territory defense. Variation in acoustic signals may reflect population structure, lack of gene flow, and phylogenetic ... -
Territory size, population density, and natural history of Cabanis’s Ground Sparrow, an endemic species found in urban areas
(2021)Worldwide urban expansion threatens biodiversity inhabiting the original natural environments now being transformed, especially range-restricted species. Here, we provide estimates of population density, population size, ... -
Intruder familiarity and not duet similarity influences the territory defense in a year-round territorial bird species
(2022)To avoid unnecessary energy expenditures in territorial defense, many species (e.g., insects, amphibians, birds, and mammals) have developed the capability to distinguish between different intruder types using visual, ... -
The use of artificial substrate and materials for nest building in 2 ground-finches (Geospiza spp.) under human-altered conditions
(2021)Urbanization is one of the main problems for biodiversity around the world, associated with a decrease of natural habitats and its resources. In contrast, urbanization can also provide new resources that could be used by ... -
A test of the Acoustic Adaptation Hypothesis in three types of tropical forest: degradation of male and female Rufous-and-white Wren songs
(2016)Many animals produce complex vocalizations that show pronounced variation between populations. The Acoustic Adaptation Hypothesis helps to explain this variation, suggesting that acoustic signals are optimized for transmission ... -
First record of Lesson's Seedeater Sporophila bouvronides in Costa Rica
(2022)We report the first record of Lesson’s Seedeater Sporophila bouvronides, a South American species, in Costa Rica. It was seen at Tortuguero, in the lowlands of north-east Costa Rica in June 2022. The record is perhaps ... -
An overview of bird records committees in the Neotropics
(2018)Neotropical bird records committees have been growing in numbers, remit and prominence in recent years. This feature – by members of those committees – explains how and why committees were established and encourages birders ... -
Does the distance to forests or buildings influence great kiskadee (Pitangus sulphuratus) nesting site selection?
(2021)The expansion of human settlements has produced significant changes in natural ecosystems by fragmenting and reducing their area. Those changes influence the availability of natural and artificial sites used to build nests ... -
Nest architecture and parental care in Ruddy Treerunner Margarornis rubiginosus
(2018)We complement the only existing nest description for Ruddy Treerunner Margarornis rubiginosus and include observations of nestbuilding and breeding behaviour. We also compare our data with existing information on nest ... -
Eavesdropping avoidance and sound propagation: the acoustic structure of soft song
(2017-12)Many species use low-amplitude (soft) song during close range interactions with conspecifics, such as in aggressive encounters or courtship displays. It has been suggested that soft song is adapted to limit eavesdropping ... -
Nest design and parental care of Striped Woodhaunter Automolus subulatus
(2020)The western and trans-Andean populations of Striped Woodhaunter Automolus subulatus are sometimes considered separate species. We discuss previously published data on the nesting of Striped Woodhaunter and present novel ... -
Urbanization has opposite effects on the territory size of two passerine birds
(2020-04-28)Background: Urban expansion has been identified as one of the leading drivers of biodiversity change or loss. For birds, urbanization is specifically related to survival, breeding success, and territory size. Understanding ...
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