Results 51 to 60 of about 4,758 (197)

Ethological observations of the Bat falcon Falco rufigularis in Ecuador (Falconiformes: Falconidae)

ACI Avances en Ciencias e Ingenierías, 2012
We present the monitoring information of two pairs of Bat Falcon (Falco rufigularis), one in a locality of Ecuadorian Amazon (in the Yasuní National Park, from May to June 2012) and in a locality in western Ecuador (in Milagro city, from October ...
Héctor F. Cadena-Ortiz, Orlando Carrión, Daniela Bahamonde-Vinueza, Tjitte de Vries   +3 more
doaj   +1 more source

Estimating egg mass-body mass relationships in birds [PDF]

, 2020
The mass of a bird’s egg is a critical attribute of the species’ life history and represents a fundamental component of reproductive effort. Indeed, the tradeoff between the number of eggs in a clutch and clutch mass lies at the heart of understanding ...
Balasubramaniam, Priya, Rotenberry, John T   +1 more
core  

Prevalence and Diversity of Haemosporidian–Associated Matryoshka RNA Viruses in a Natural Population of Wild Birds

Ecology and Evolution, Volume 15, Issue 5, May 2025.
This study investigated the prevalence and diversity of Matryoshka RNA viruses (MaRNAV) in wild birds in the San Francisco Bay Area, California. Using RNA sequencing and RT‐PCR, we identified two novel MaRNAVs (MaRNAV‐5 and ‐6) associated with haemosporidian infections in passerines and raptors. These findings suggest a high prevalence of these viruses,
Carlos W. Esperanza, Caroline E. Faircloth, Scott W. Roy, Ravinder N. M. Sehgal   +3 more
wiley   +1 more source

Nuevas adiciones a las aves de Colombia

Caldasia, 1944
Anas rubripes subsp. / Dafila spinicauda (Vieillot) / Sarkidiornis carunculata (Lichtenstein) / Erismatura (Oxyura) ferruginea Eyton / Falco peregrinus cassini Sharpe / Neomorphus radiolosus Sclater & Salvin / Bubo virginianus nigrescens Berlepsch.
Lehmann V. F. C.
doaj  

Primer registro del halcón pecho naranja (Falco deiroleucus) para el departamento de Tarija, Bolivia

Acta Zoológica Lilloana
El halcón pecho naranja (Falco deiroleucus) es una rapaz neotropical muy rara, pero con una amplia distribución desde México hasta Argentina. Sin embargo, su identificación es complicada debido a su similitud con otras especies, como Falco rufigularis ...
Nicole Adriana Avalos Saavedra, Rebeca Tapia, Miguel Montenegro Avila, Guido Herrera Valdez, Marleni Guerrero Segundo, Erico Segovia   +5 more
doaj   +1 more source

Nutritional osteodystrophy in South American birds of prey [PDF]

Pesquisa Veterinária Brasileira
: Nutritional osteodystrophy is a metabolic bone disease characterized by increased bone resorption and replacement by fibrous connective tissue, resulting from a diet with excess phosphorus or deficient in calcium or vitamin D.
Luiz G.S. Oliveira, Fabiana M. Boabaid, Marina P. Lorenzett, Paula R. Almeida, Luiza P. Ehlers, Luciana Sonne, Cláudio E.F. Cruz, David Driemeier   +7 more
doaj   +1 more source

Collapse of a desert bird community over the past century driven by climate change [PDF]

, 2020
Climate change has caused deserts, already defined by climatic extremes, to warm and dry more rapidly than other ecoregions in the contiguous United States over the last 50 years.
Beissinger, Steven R., Iknayan, Kelly J.
core  

Beware of hitchhiking ticks? Clarifying the variable roles of bird species in tick movement along migratory routes

Journal of Avian Biology, Volume 2025, Issue 3, May 2025.
Ticks are blood‐feeding parasites which act as major vectors for various pathogenic microorganisms affecting both animal and human health. Hard ticks are known to move passively (i.e. ‘hitchhike') on migratory birds as they transit between breeding and non‐breeding grounds.
Lars Burnus, Joe Wynn, Miriam Liedvogel, Robert E. Rollins   +3 more
wiley   +1 more source

Primer registro de Neodiplostomum travassosi (Digenea: Diplostomidae) en Argentina First record of Neodiplostomum travassosi (Digenea: Diplostomidae) in Argentina

Revista Mexicana de Biodiversidad, 2005
Se redescribe e ilustra a Neodiplostomum travassosi Dubois, 1937 (Diplostomidae: Diplostominae) con base en ejemplares recolectados del intestino de Polyborus plancus (Miller) (Falconidae) y Phalacrocorax brasilianus (Gmelin) (Phalacrocoracidae ...
Lía I. Lunaschi, Fabiana B. Drago
doaj  

Desenvolvimento de uma metodologia de caracterização ecológica da estrutura de uso aplicável no processo de Ordenamento do Território [PDF]

, 1998
O presente estudo procura contribuir para o desenvolvimento de uma metodologia de gestão com base numa concepção do sistema ecológico que aborda aspectos fisionómicos e de composição específica conjuntamente com a análise de perturbações.
Quinta-Nova, L.C.
core