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Esteban Botero-Delgadillo

Esteban Botero-Delgadillo
SELVA: Investigación para la conservación en el Neotrópico · Conservation Science Program

Dr.Sc. (Doctor of Science)
Combining basic and applied research to answer multilevel ecological questions, from individuals to populations/species.

About

84
Publications
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414
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Introduction
I am interested in the relationship between intra-specific variability and ecological patterns expressed at the population and species levels. I am focused on answering these questions: What drives individual variation in reproductive strategies and movement behavior? What are the ecological and genetic consequences of such variation? I combine the conceptual frameworks from movement ecology and population genetics, while aiming at generating useful information for biodiversity conservation.

Publications

Publications (84)
Article
Full-text available
El nombre de la especie de paseriforme Aphrastura subantarctica, propuesto por Rozzi et al. (2022), no está disponible, dado que la publicación donde el mismo fue propuesto no cumplió con todos los requisitos del Código Internacional de Nomenclatura Zoológica. En esta nota establecemos la disponibilidad del nombre de la especie Aphrastura subantarc...
Article
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We describe a new taxon of terrestrial bird of the genus Aphrastura (rayaditos) inhabiting the Diego Ramírez Archipelago, the southernmost point of the American continent. This archipelago is geographically isolated and lacks terrestrial mammalian predators as well as woody plants, providing a contrasted habitat to the forests inhabited by the othe...
Article
Animal cooperation occurs in both genetically related and unrelated groups of individuals, involving costs and benefits that have not been fully elucidated. For example, risky behaviour such as mobbing a predator would be selected if participants are genetic relatives because they share a fraction of their gene pool (i.e., kin selection or indirect...
Article
Natural history information is one of the major knowledge gaps in Neotropical ornithology. Several range-restricted and threatened species in the region are still poorly known, hindering the design of effective conservation programs. Here, we used direct observations collected at 7 localities throughout the Tropical Andes to describe habitat use an...
Article
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Investigating whether mating patterns are biased in relation to kinship in isolated populations can provide a better understanding of the occurrence of inbreeding avoidance mechanisms in wild populations. Here, we report on the genetic relatedness (r) among breeding pairs in a relict population of Thorn‐tailed Rayadito (Aphrastura spinicauda) in no...
Article
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1. Neotropical countries receive financing and effort from temperate nations to aid the conservation of migratory species that move between temperate and tropical regions. If allocated strategically, these resources could simultaneously contribute to other conservation initiatives. In this study, we use novel distribution maps to show how those res...
Article
The lack of high-quality information on data-poor species can hinder efforts to inform conservation actions via spatial distribution modeling. This is particularly true for tropical birds of conservation concern, for which ecological studies and assessments of their conservation status have received limited funding. Here we use a cost- and time-eff...
Article
Understanding the genomic landscape of adaptation is central to the understanding of microevolution in wild populations. Genomic targets of selection and the underlying genomic mechanisms of adaptation can be elucidated by genome-wide scans for past selective sweeps or by scans for direct fitness associations. We sequenced and assembled 150 haploty...
Article
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Extra- pair behavior is present in 76% of socially monogamous bird species with biparental care. This behavior may produce costs to females related to a reduction in paternal care. We estimated the percentage of extra- pair offspring and quantified paternal care in 44 nests of Thorn- tailed Rayadito (Aphrastura spinicauda) to assess whether males r...
Article
Within-population variation in timing of breeding may be linked to a trade-off between the risks and benefits of breeding earlier. This trade-off may be mediated by individual risk-taking behaviour, but this needs to be assessed in detail in wild populations. Here, we recorded timing of breeding and risk-taking behaviour during three consecutive br...
Article
Life‐history theory predicts that hosts may adjust the costs of parasites by altering their reproductive effort. Haemosporidian parasites can affect the reproductive output of wild birds in multiple ways. Thorn‐tailed Rayaditos Aphrastura spinicauda breeding in Navarino Island, Southern Chile (55°‐40° S) experience high prevalence of the haemospori...
Article
Baseline concentrations of glucocorticoids (i.e., cortisol and/or corticosterone) can moderately increase with the degree of energy demands that an individual faces. This could be a mechanism based on which glucocorticods (GCs) can mediate life history trade-offs, and therefore fitness. The 'cort-fitness hypothesis' predicts a negative relationship...
Article
Heterozygosity-fitness correlations (HFCs) have been used to monitor the effects of inbreeding in threatened populations. HFCs can also be useful to investigate the potential effects of inbreeding in isolated relict populations of long-term persistence, and to better understand the role of inbreeding and outbreeding as drivers of changes in genetic...
Article
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Studies on extrapair paternity (EPP) are key to understanding the ecological and evolutionary drivers of variation in avian mating strategies, but information is currently lacking for most tropical and subtropical taxa. We describe the occurrence of EPP in two populations of a South American socially monogamous bird, the Thorn-tailed Rayadito, base...
Article
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The evolutionary consequences of individual genetic diversity are frequently studied by assessing heterozygosity‐fitness correlations (HFCs). The prevalence of positive and negative HFCs and the predominance of general versus local effects in wild populations are far from understood, partly because comprehensive studies testing for both inbreeding...
Article
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Understanding the population genetic consequences of habitat heterogeneity requires assessing whether patterns of gene flow correspond to landscape configuration. Studies of the genetic structure of populations are still scarce for Neotropical forest birds. We assessed range-wide genetic structure and contemporary gene flow in the thorn-tailed raya...
Article
El rascón andino (Rallus semiplumbeus) es un ave endémica a la cordillera oriental de Colombia, considerada en peligro de extin- ción (EN). Poco se conoce sobre sus requerimientos ecológicos y su uso del espacio en los humedales de la sabana de Bogotá. Describimos el uso del hábitat y patrones temporales de actividad vocal, basados en un monitoreo...
Article
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Latitudinal gradients are well-suited systems that may be helpful explaining distribution of haemosporidian parasites and host susceptibility. We studied the prevalence, diversity and drivers of haemosporidian parasites (Leucocytozoon, Plasmodium and Haemoproteus) along a latitudinal gradient (30°–56° S), that encompass the total distribution (~3,0...
Article
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The breeding biology of the Santa Marta Parakeet Pyrrhura viridicata is described based on the study of the population inhabiting the San Lorenzo Ridge, an Important Bird Area within the Sierra Nevada de Santa Marta, Colombia. We performed surveys during 2005–2008 and installed 48 nest boxes at four sites in May 2006. Nineteen nesting attempts were...
Article
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Studies on the relationship between behavioral traits and dispersal are necessary to understand the evolution of dispersal syndromes. Empirical studies have mainly focused on natal dispersal, even though behavioral differences between dispersers and philopatric individuals are suspected to hold through the whole life cycle, potentially affecting br...
Article
Age‐specific variation in reproductive effort can affect population dynamics, and is a key component of the evolution of reproductive tactics. Late‐life declines are a typical feature of variation in reproduction. However, the cause of these declines, and thus their implications for the evolution of life‐history tactics, may differ. Some prior stud...
Article
Sex-biased natal dispersal is predicted to be a consequence of differences in the costs and benefits of dispersal perceived by each sex. Although female-biased dispersal has been described for numerous birds in heterogeneous landscapes, studies documenting sex-related differences in the causes and consequences of natal dispersal in fragmented habit...
Article
Information on how wildlife is affected by pine plantation clearcutting is relevant for designing management strategies to promote biodiversity conservation in productive systems. By comparing the number of records of carnivores in a mosaic of pine plantations and native forest remnants before and after pine harvesting, we assessed the effect of pl...
Article
Molt is an energetically expensive process in which birds may allocate 25% or more of their body protein mass to the production of new feathers. Stressful events can interfere with feather growth via the adrenal hormone corticosterone, which is released in response to environmental stress. Corticosterone release, in turn, regulates gluconeogenesis...
Article
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The distribution of suitable habitat influences natal and breeding dispersal at small spatial scales, resulting in strong microgeographic genetic structure. Although environmental variation can promote interpopulation differences in dispersal behavior and local spatial patterns, the effects of distinct ecological conditions on within-species variat...
Article
Psittaciformes (parrots, cockatoos) are among the most endangered birds, with 31% of Neotropical species under threat. The drivers of this situation appear to be manifold and mainly of anthropogenic origin. However, this assessment is based on the last extensive consultation about the conservation situation of parrots carried out in the 1990s. Give...
Article
Environmental adjustment is the most invoked explanation for intra-seasonal variation in bird nest morphology. However, time constraints may also be important, coming as a trade-off between the costs of nest building and the requirement to coincide a breeding attempt with maximal food supply. We describe the seasonal variation in nest morphology of...
Article
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Nest morphology can affect the breeding success of birds. Thus, birds inhabiting different environments may experience divergent selection for nest structure and composition that results in intraspecific geographic variation in nest architecture. We describe interpopulation differences in nest architecture among Thorn-tailed Rayaditos (Aphrastura s...
Article
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Nesting birds commonly incorporate feathers into nest linings given their insulation properties. Although use of feathers is common among swallows, here we provide the first recording of nests built almost completely with feathers (57–60% of total nests mass), by the Chilean Swallow (Tachycineta leucopyga) in southern Chile. Low temperatures or a h...
Article
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We present descriptions of nest architecture, clutch size, nestling growth and nestling attendance for the Fire-eyed Diucon (Xolmis pyrope), based on nests found at the Fray Jorge National Park, Chile, at the northernmost part of its distribution. Nests were cup-shaped structures averaging 283.5 ± 26.6 mm in width and 123.1 ± 6.8 mm in height (n =...
Article
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An understanding of the ecological factors determining bird species distribution is essential for making informed conservation decisions. These data are especially important for range-restricted species, such as the Santa Marta Bush-Tyrant (Myiotheretes pernix), a threatened endemic of the Sierra Nevada de Santa Marta (SNSM) in Colombia. Here we ad...
Article
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The Santa Marta Foliage-gleaner Automolus rufipectus is one of 19 endemic bird species found in the Sierra Nevada de Santa Marta (SNSM) in northern Colombia but until recently it was considered a sub-species of the Ruddy Foliage-gleaner Automolus rubiginosus . Consequently, published information on its distribution and ecology is lacking, and while...
Article
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Interspecific competition among secondary cavity nesters can involve physical conflicts between individuals, which may lead to serious injuries or death. Here we report a case of aggression by a pair of Chilean Swallows (Tachycineta meyeni) towards a nestling of the Thorn-tailed Rayadito (Aphrastura spinicauda) in the sub-Antarctic forests of Chile...
Article
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We report a new locality for the rodent Chelemys megalonyx in Rinconada de Maipú (Santiago, metropolitan region, central Chile), located in the central valley of Chile, in the eastern slope of the Chilean coastal range. Although the collected specimens show morphological similarities with other members of Chelemys, some cranial and body measurement...
Article
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The ecology and natural history of Todd's parakeet Pyrrhura picta caeruleiceps is scarcely known. We describe some aspects of its habitat use, diet and flight behaviour at two localities in north-eastern Colombia. Our observations indicate that, at least locally, these birds tolerate and frequently use transformed areas. However, their flight patte...
Article
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We describe the nest, eggs and chicks, and present other observations on the breeding biology of White-vented Plumeteer Chalybura buffonii based on a nest in Ibagué, Colombia. The nest was a small compact cup of plant fibres, down, cobwebs, small twigs and dried leaves, externally decorated with green moss and some lichen. It contained two elliptic...
Article
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Resumen Presentamos varios registros del Cabezón Cinéreo (Pachyramphus rufus) en los departamentos del Vichada, Casanare y Me-ta en los Llanos Orientales colombianos, en donde no existían registros previos. Nuestra reconstrucción de la distribución geográfica sugiere que la especie se encuentra a lo largo de los llanos venezolanos y colombianos, y...
Article
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We present the first detailed descriptions of the breeding biology of the Blue-naped Chlorophonia (Fringillidae; Chloropho-nia cyanea). In the Santa Marta Mountains, the Blue-naped Chlorophonia builds domed nests on vegetated roadbanks or roadside cliffs. They generally used existing vegetation to form the dome; in one case we inferred that a pair...
Article
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The criteria and categories of the IUCN red list can be applied to any taxonomic unit, including taxa below species level or non-formally described forms, but this is seldom practiced. Because conservation priorities largely focus on well-established taxa that deserve urgent action, cryptic species may be facing a critical situation. This could be...
Article
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Morphology is commonly used as a predictor of ecological relationships among species when studying local assemblages of Neotropical birds. Nevertheless, most evidence supporting ecomorphological correspondence in birds comes from studies of communities and not from local assemblages and, moreover, from temperate latitudes. To increase our understan...
Article
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Todd's parakeet Pyrrhura picta caeruleiceps is a geographically isolated race of painted parakeet P. picta, a widespread species. Several authors highlight the need to recognize Todd's parakeet at the species level, and despite past efforts to find new populations, no new locations have been found. We applied a Species Distribution Model (SDM) to g...
Article
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El resultado de la muda se ve reflejado en el estado y características del plumaje, las cuales a su vez son útiles para la datación y el sexado de aves en la mano. A pesar de la indiscutible utilidad de esta herramienta para la investigación, en el Neotrópico aún carecemos de información detallada sobre la muda de muchas especies. Entre el 2007 y e...
Article
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Bogotá rail is endemic to Colombia and has a very restricted geographical range. It is currently listed as Endangered (EN) by the IUCN. Here we present the first confirmed record of predation on Bogotá rail and also discuss the information available for the predator, Roadside Hawk. Our observation reveals that common raptors also pose threat to thi...
Data
We present the first description of the nest and eggs of the Santa Marta Brush-Finch (Atlapetes melanocephalus), a species endemic to the Santa Marta Mountains, Colombia. Three nests were found; all were bulky cups built with different materials and located in different vegetation types, as found in other members of the genus Atlapetes. Nests conta...
Article
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We present the first description of the nest and eggs of the Santa Marta Brush-Finch (Atlapetes melanocephalus), a species endemic to the Santa Marta Mountains, Colombia. Three nests were found; all were bulky cups built with different materials and located in different vegetation types, as found in other members of the genus Atlapetes. Nests conta...
Article
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El Periquito de Santa Marta (Pyrrhura viridicata) es una especie endémica y amenazada de Colombia, cuyas necesidades de conservación incluyen determinar su estado poblacional y distribución geográfica. En este trabajo recopilamos y analizamos datos geográficos y poblacionales obtenidos entre 2006 y 2012, aportando información para facilitar la defi...
Article
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Pese a la importancia de los géneros Cecropia, Ficus y Miconia para las aves frugívoras, existen otras plantas con características similares que han sido poco estudiadas. Para identificar la relevancia de plantas del género Guettarda (Rubiacae), estudié el consumo de frutos de G. roupaliefolia por parte de las aves frugívoras en un bosque premontan...
Article
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In order to contribute to our knowledge of molt in Neotropical birds, we describe molt strategies, molt cycles and plumage sequences in Diglossa albilatera. Through the examination of captured individuals and museum specimens, we found that, as in other Neotropical species, D. albilatera shows a complex-basic strategy with a pre–juvenile and a part...