Abstract The keystone roles of mega‐fauna in many terrestrial ecosystems have been lost to defaunation. Large predators and herbivores often play their native ranges, some established invasive populations new biogeographic regions. However, few empirical examples are available guide expectations about how affect novel environmental evolutionary contexts. We examined the impacts on aquatic an emerging population hippopotamus ( Hippopotamus amphibus ) that has growing Colombia over last 25 yr....

Research on avian bioacoustics in the Neotropics has surged over last several decades due to increased interest large diversity of vocal behaviors and vocalization broader accessibility recording equipment software. Here, we present a synthesis current past knowledge Neotropical bird bioacoustics. This is result symposium "Bioacoustics Neotropics", organized for XI Ornithological Congress San Jose, Costa Rica, July 2019. We covered what consider main topics that have been studied this region...

The Black Tinamou (Tinamus osgoodi) is a rare and endangered bird with two geographically disjunct subspecies. Very little pertinent information exists due to its secretive habits cryptic coloration. Observations from one-year study at Alto Fragua Indi Wasi National Park in southern Colombia have provided new ecological for T. o. hershkovitzi. This subspecies vocalizes mostly between March April, suggesting that the breeding season occurs during first half of year. Detections by camera traps...

Species delimitation has important consequences for the management of endangered species. Species‐level taxonomy in genus Crypturellus (Tinamidae) been based largely on plumage characters and species limits several groups have difficult to establish. Because some forms uncertain taxonomic status are currently threatened with extinction, a basic understanding is crucial not only taxonomists but also conservation biologists managers. We analysed vocal variation assess two species‐groups,...

We describe Scytalopus alvarezlopezi from the Western Andes of Colombia. The new species forms part a distinctive clade tapaculos (Rhinocryptidae) that also includes S. robbinsi Ecuador and stilesi rodriguezi, which occur on Central Eastern is easily diagnosable its near relatives by song mitochondrial DNA; differences in plumage exist but are more subtle. inhabits dense understory vegetation floors lower slopes ravines cloud forest at elevations 1,300 to 2,100 m. On Pacific slope,...

The Black Tinamou (Tinamus osgoodi) is a rare species with 2 recognized subspecies distributed locally. This one of the most poorly known tinamous; few sound recordings exist, and behavioral or sighting records are found in literature ornithological databases. We compiled all information on its geographic distribution climate to provide greater understanding current distribution. also available order perform bioacoustic analyses evaluate differences between subspecies. seem be isolated by an...

Cotingas are considered essentially frugivorous, but a few records suggest they might include small vertebrates in their diet, mainly during the breeding season. In March 2015, we recorded young male of an Andean Cock-of-the-rock (Rupicola peruvianus) chasing and eating adult Canada Warbler (Cardellina canadensis) Santa Maria, Boyacá (Colombia). The next day, observed another Swainson's Thrush (Catharus ustulatus), were unable to observe end chase. Observations hunting this species may be...

Seasonally dry tropical forest is the least known and most threatened ecosystem in Neotropics. In December 2009, we surveyed 3 remnants arid Cúcuta valley, northeast Colombia. We recorded 140 of 171 maximum species expected for study area. Another 20 were observed outside inventory, totaling 160 whole region. Results similarity analysis showed that valley avifauna biogeographically more related to inter-Andean river valleys than Caribbean plains Colombia lowlands northern Venezuela. This...

Las señales acústicas son una de las formas comunicación más importante en la fauna, incluso ubicación espacial los individuos y sus presas. El estudio fortalece campos investigación ecología, comportamiento, identificación taxonómica, uso hábitat e el efecto actividades humanas sobre diferentes especies animales. Además, es herramienta para cuantificación monitoreo biodiversidad. En este trabajo presentamos un análisis estudios basados bioacústica que se han desarrollado Colombia, con fin...

Animals communicate using signals perceived via multiple sensory modalities but usually invest more heavily in one of type signal. This pattern, observed by Darwin 1 and many researchers since, led to development the transfer hypothesis (see also transferal effect 2 tradeoff 3,4 ), which predicts a negative relationship between investment different signaling dictated relative costs benefits each. One factor that influences benefits, is central drive 5 posed account for signal evolution,...

La bioacústica, o el estudio de los sonidos que producen animales, es una herramienta ha sido ampliamente usada en las aves, con un incremento número estudios la aplican últimas décadas por su carácter poco invasivo y relativo bajo costo. Aquí presentamos revisión sistemática investigaciones sobre bioacústica aplicada a ornitología colombiana últimos 22 años, identificando principales temáticas se abordan (e.g., taxonomía, inventarios monitoreos, comportamiento, ecología), exploramos...

Avian inventories of the poorly known tropical dry forest in Cúcuta Valley, north-east Colombia, yielded new distributional data for 15 bird species including several range extensions along east slope East Andes, or filled gaps between Serranía de Perijá and Mérida Andes Venezuela, Maracaibo basin Venezuela eastern Llanos Colombia. Some records are fairly common but easily overlooked associated with dense habitats, whereas others concern open-country whose spread has apparently been promoted...

Abstract Understanding how often do animals emit communication signals is of critical importance to address a variety research questions in behavioral ecology and sexual selection. However, information on vocal output, central component investment signaling, lacking for most species employing acoustic communication. Because this lack partly due logistical methodological difficulties monitoring animal signaling over time, developing new approaches quantify output special importance. We asked...

Abstract Birds inhabit a variety of habitats and they communicate using primarily visual acoustic signals; two central hypotheses have been postulated to study the evolution such signals. The sensory drive hypothesis posits that variation in physical properties leads natural selection pressures by affecting ease with which different types signals are perceived. Assuming resources limited for animals, transfer predicts negative relationship between investments We evaluated these tropical...

Abstract Vocal communication is particularly important for nocturnal species as well those living in dense forests, where visual abilities can be somewhat constrained. The Andean night monkey ( Aotus lemurinus ) a American primate mountain forests the Northern Andes with scant information on its behavior and ecology. main goal of this study to describe vocal repertoire group wild monkeys compare it earlier bioacoustics studies only platyrrhines. We recorded eastern Colombia between August...

Los patrones de actividad vocal diaria son clave para conocer las dinámicas comportamentales especies. Si bien vocalizaciones ocurren a lo largo del día, muchas especies aves tienden concentrar la mayor cantidad en dos momentos específicos: el coro amanecer y atardecer, periodos diarios gran presentes mayoría los paseriformes. Actualmente se están usando herramientas detección acústica con fin facilitar hacer más efectivo monitoreo En presente estudio determinaron canto llamadas Cucarachero...

El loro orejiamarillo (Ognorhynchus icterotis) y el periquito aliamarillo (Pyrrhura calliptera) son dos especies de loros andinos amenazados en Colombia. Recientes exploraciones zonas remotas del Parque Nacional Natural Chingaza su zona con función amortiguadora han conllevado al hallazgo bosques bien conservados dominados por palmas cera (Ceroxylon quindiuense) municipio San Juanito, Meta, hábitat especialmente adecuado para ambas especies. Teniendo cuenta la distribución potencial estrecha...

We provide the first detailed descriptions of nest cavity and eggs White-tailed Quetzal (Pharomachrus fulgidus) from montane forest SW slope Sierra Nevada de Santa Marta, northern Colombia. found two active cavities (both >2.5 m high) in isolated tree snags non-native Mexican weeping pine (Pinus patula). One contained unmarked, pale turquoise at bare base. The P. fulgidus resemble those other high elevation species quetzals. Breeding occurs half Julian calendar during end dry season....

Evaluamos la preferencia de hábitat por Capito hypoleucus usando como indicador densidad poblacional del ave. Con este fin seguimos un enfoque jerárquico diferentes escalas respuesta especie, basados en datos obtenidos Serranía Las Quinchas el valle Magdalena Colombia, complementados registros especie a lo largo su distribución. Medimos abundancia parte más alta y piedemonte misma. En cada una estas altitudes comparamos bosques primarios secundarios, relacionando con características...

Studies focused on soundscape are important biological conservation, because natural sounds permanent and with dynamic properties, they have been linked to the welfare of environment structure landscape. These studies usually analyze sound in time frequency domains, computationally heavy centralized algorithms. However, new technologies for real analysis requires distributed algorithms low computational cost. Hence, present work evaluates cost alternative methods potential applicability...