Results 21 to 30 of about 446,034 (255)
The lack of males due to illegal trapping is causing polygyny in the globally endangered Yellow Cardinal Gubernatrix cristata [PDF]
Revista Brasileira De Ornitologia, 2019 AbstractWe present breeding data from the southernmost populations of the globally “Endangered” Yellow CardinalGubernatrix cristatain Argentina, confirming the presence of current breeding populations in the region. We monitored a family group in a nesting territory composed of one male and three females throughout the breeding season 2017–2018.
Segura Luciano N
exaly +4 more sources
Impact of Shiny Cowbird and botfly parasitism on the reproductive success of the globally endangered Yellow CardinalGubernatrix cristata [PDF]
Bird Conservation International, 2014 SummaryThe Yellow CardinalGubernatrix cristatais a globally endangered passerine endemic to southern South America. Although the conservation status of this species is alarming, there is no information about factors that affect its reproductive success. We studied the breeding biology of a Yellow Cardinal population in Corrientes province in north-east
Dominguez, Marisol +2 more
openaire +4 more sources
Conservation Genetics, 2017 The yellow cardinal, Gubernatrix cristata, is an endangered passerine from southern South America. Populations are declining due to the loss of their natural habitat, which has caused a fragmented distribution, and the continuous extraction of individuals from the wild, mainly males, to sell them as cage birds.
Juan CARLOS Reboreda, Marisol Dominguez
exaly +4 more sources
New avian hosts for Taphropiestes plaumanni (Coleoptera: Cavognathidae) and the record of nestlings skin lesions and body deterioration associated with parasitism [PDF]
Anais da Academia Brasileira de Ciências, 2022 We collected data during three consecutive breeding seasons (2015-2018) to assess the effects of Taphropiestes plaumanni (Coleoptera: Cavognathidae) on its bird hosts in a native forest of central eastern Argentina.
EXEQUIEL GONZALEZ +3 more
doaj +1 more source
Drivers of phenotypic divergence in a Mesoamerican highland bird [PDF]
PeerJ, 2022 Animals derive their coloration from a variety of pigments as well as non-pigmentary structural features. One of the most widespread types of pigments are carotenoids, which are used by all invertebrate taxa and most vertebrate orders to generate red ...
Sahid M. Robles-Bello +4 more
doaj +2 more sources
Ecological Informatics, 2023 Abstract Audio-based analysis of bird songs has proven to be a valuable practice for the growth of knowledge in the fields of ethology and ecology. In recent years, machine learning techniques applied to audio field recordings of bird calls have yielded successful results in studying population distributions and identification of ...
Hernan Bocaccio +4 more
openaire +2 more sources
Breeding biology of the endangered Yellow Cardinal Gubernatrix cristata in Brazil [PDF]
Revista Brasileira de Ornitologia, 2019 AbstractThe Yellow Cardinal,Gubernatrix cristata, has a small geographic range in Brazil, Uruguay, and Argentina. We studied the natural history of the only known Brazilian population of this “Endangered” species (∼50 individuals), which is socially monogamous and may breed cooperatively.
Christian Beier +1 more
openaire +1 more source
BMC Molecular and Cell Biology, 2020 Background Eye pigmentation genes have been utilized as visible markers for constructing genetic control prototypes in several insect vectors of human disease.
Xuejiao Xu +4 more
doaj +1 more source
Species-Specific Responses of Bird Song Output in the Presence of Drones
Drones, 2021 Drones are now widely used to study wildlife, but their application in the study of bioacoustics is limited. Drones can be used to collect data on bird vocalizations, but an ongoing concern is that noise from drones could change bird vocalization ...
Andrew M. Wilson +4 more
doaj +1 more source
Composition for cardinal directions by decomposing horizontal and vertical constraints [PDF]
, 2003 In this paper, we demonstrate how to group the nine cardinal directions into sets and use them to compute a composition table. Firstly, we define each cardinal direction in terms of a certain set of constraints.
Ah Lian Kor +3 more
core +2 more sources