Results 21 to 30 of about 1,446 (149)
BirdsUrban parks are hot spots of bird diversity in cities. However, their role as urban filters for raptor species has not been assessed yet. This study aimed to compare the functional and phylogenetic traits of raptor assemblages in urban parks with the ...
Lucas M. Leveau
doaj +2 more sources
Ethology, 2013 AbstractWe studied object exploration and manipulative behavior in wild‐caught Chimango Caracaras (Milvago chimango), an opportunistic and generalist raptor species, in relation to age and sex differences. Each bird was presented with six objects. We then recorded the latencies to approach and first contact with the objects, the number of objects ...
L. Biondi +4 more
semanticscholar +3 more sources
Long-term directional changes in urban bird communities of Mar del Plata City, Argentina
Frontiers in Ecology and EvolutionUrban environments have been characterized by their temporal stability of resources, which could promote stability in bird composition. Several studies have found that bird communities in urban environments persist over the years, showing a similar ...
Lucas M. Leveau
doaj +2 more sources
Emu - Austral Ornithology, 2015 Natural environments have been greatly transformed by human populations and activities and the responses of species to these changes vary. In human-dominated environments, birds may adopt behaviours that enable them to adjust to these novel habitats. We analysed the reproductive ecology of a common and human-tolerant bird of prey, the Chimango Caracara
C. Solaro, J. Sarasola
semanticscholar +3 more sources
The shapes of bird beaks are highly controlled by nondietary factors. [PDF]
Proc Natl Acad Sci U S A, 2016 Bird beaks are textbook examples of ecological adaptation to diet, but their shapes are also controlled by genetic and developmental histories. To test the effects of these factors on the avian craniofacial skeleton, we conducted morphometric analyses on
Bright JA +3 more
europepmc +7 more sources
Did extreme nest predation favor the evolution of obligate brood parasitism in a duck? [PDF]
Ecol Evol, 2022 We used an experimental nest predation study to test the idea that high nest predation rates coupled with high success by laying in aggressive host nests played a role in the evolution of brood parasitism in the enigmatic black‐headed duck. Experimental duck eggs in untended nests suffered massive rapid predation, while eggs in tended nests of the ...
Lyon BE +3 more
europepmc +2 more sources
Revisión de la tafonomía actualística de los micromamíferos ingeridos por depredadores de América del Sur. Su importancia en la interpretación del registro fósil [PDF]
Publicación Electrónica de la Asociación Paleontológica Argentina, 2019 En este trabajo se valora el estado actual del conocimiento de las características tafonómicas de los restos de micromamíferos (roedores y marsupiales) generados por la acción de los diferentes depredadores (aves rapaces y mamíferos carnívoros) de ...
Fernández, Fernando Julián +1 more
core +3 more sources
Combining point counts and autonomous recording units improves avian survey efficacy across elevational gradients on two continents. [PDF]
Ecol Evol, 2021 Using avian surveys conducted in comparable, high elevation, temperate mountain habitats at opposite ends of the Americas (British Columbia, Canada, and southern Chile), we show combined ARU and point count methods are among the most efficient and accurate approaches to capturing diversity.
Drake A +7 more
europepmc +2 more sources
Tree-Cavity Denning of Güiña (<i>Leopardus guigna</i>) and Breeding Productivity From Camera Trap Records. [PDF]
Ecol EvolTree cavities are critical habitats for numerous vertebrate species. We report the first evidence of güiña breeding in a tree cavity, with insights from camera trap surveys in south‐central Chile's temperate forests. These findings enhance our understanding of the species' natural history, breeding behavior, and habitat preferences.
Novoa FJ +6 more
europepmc +2 more sources
Recognition of Predator Type and Risk Level in Azure-Winged Magpies (Cyanopica cyanus) Through Visual and Auditory Cues. [PDF]
Ecol EvolIn this study, we demonstrated that Azure‐winged Magpies (Cyanopica cyanus) uses both visual and auditory cues to detect different predator types and to assess the risk level during the non‐breeding season. In particular, a stronger anti‐predator response was observed to Domestic Cats than to the less frequently encountered Common Kestrel and two non ...
Zuo T +5 more
europepmc +2 more sources