Results 41 to 50 of about 2,742 (161)

Investigation of Babesia sp. in pygoscelid penguins at the South Shetland Islands

Polar Research, 2018
Babesia spp. are tick-borne parasites, and 16 avian-infecting species have been described to date, including one species (Babesia peircei) that infects penguins. Considering the results of a recent study reporting Babesia sp.
Ralph Eric Thijl Vanstreels, Francisco C. Ferreira Junior, Daniela de Angeli Dutra, Sabrina Epiphanio, Érika M. Braga, Pierre A. Pistorius, José Luiz Catão-Dias   +6 more
doaj   +1 more source

Happy Feet in a Hostile World? The Future of Penguins Depends on Proactive Management of Current and Expected Threats

Frontiers in Marine Science, 2019
Penguins face a wide range of threats. Most observed population changes have been negative and have happened over the last 60 years. Today, populations of 11 penguin species are decreasing.
Yan Ropert-Coudert, Andre Chiaradia, David Ainley, Andres Barbosa, P. Dee Boersma, Rebecka Brasso, Meagan Dewar, Ursula Ellenberg, Pablo García-Borboroglu, Louise Emmerson, Rachel Hickcox, Stephanie Jenouvrier, Stephanie Jenouvrier, Akiko Kato, Rebecca Ruth McIntosh, Phoebe Lewis, Phoebe Lewis, Francisco Ramírez, Valeria Ruoppolo, Valeria Ruoppolo, Peter G. Ryan, Philip J. Seddon, Richard Brain Sherley, Richard Brain Sherley, Ralph E. T. Vanstreels, Ralph E. T. Vanstreels, Lauren J. Waller, Lauren J. Waller, Eric J. Woehler, Eric J. Woehler, Phil N. Trathan   +30 more
doaj   +1 more source

Primer registro de cráneos asignados a Palaeospheniscus (Aves, Spheniscidae) procedentes de la Formación Bahía Inglesa (Mioceno Medio-tardío), Chile First record of skulls assigned to Palaeospheniscus (Aves, Spheniscidae) from the Bahía Inglesa formation (middle-late Miocene), Chile

Revista Chilena de Historia Natural, 2005
Los cráneos de los Spheniscidae (como los de todas las aves), aunque escasos en el registro paleontológico, muestran importantes caracteres a nivel taxonómico.
CAROLINA ACOSTA HOSPITALECHE, JHOANN CANTO   +1 more
doaj  

Vocal tract anatomy of king penguins: morphological traits of two-voiced sound production

Frontiers in Zoology, 2020
Background The astonishing variety of sounds that birds can produce has been the subject of many studies aiming to identify the underlying anatomical and physical mechanisms of sound production.
Hannah Joy Kriesell, Céline Le Bohec, Alexander F. Cerwenka, Moritz Hertel, Jean-Patrice Robin, Bernhard Ruthensteiner, Manfred Gahr, Thierry Aubin, Daniel Normen Düring   +8 more
doaj   +1 more source

Environmental and Evolutionary Forces Shaping Penguin Geographic Limits

Journal of Biogeography, Volume 52, Issue 9, September 2025.
ABSTRACT Aim Penguins are seabirds exclusively found in the Southern Hemisphere, with their existence dating back to the late Cretaceous. Despite their exceptional dispersal capabilities, which allow them to inhabit a wide range of environments—from polar regions to temperate zones, and even near the Equator—penguins are absent in the Northern ...
Amanda Mourão Santos, Ubirajara Oliveira   +1 more
wiley   +1 more source

Sobre la presencia de Paraptenodytes y Palaeospheniscus (Aves: Sphenisciformes) en la Formación Bahía Inglesa, Chile On the precense of Paraptenodytes y Palaeospheniscus (Aves: Sphenisciformes) on the Bahia Inglesa Formation, Chile

Revista Chilena de Historia Natural, 2007
El presente comentario fue motivado por el artículo de Acosta-Hospitaleche & Canto (2005) y de la observación directa de algunos especímenes de Spheniscidae previamente reportados para la Formación Bahía Inglesa, en la región de Atacama, Chile.
MARTÍN F CHÁVEZ
doaj  

Molecular characterization of Babesia peircei and Babesia ugwidiensis provides insight into the evolution and host specificity of avian piroplasmids

International Journal for Parasitology: Parasites and Wildlife, 2017
There are 16 recognized species of avian-infecting Babesia spp. (Piroplasmida: Babesiidae). While the classification of piroplasmids has been historically based on morphological differences, geographic isolation and presumed host and/or vector ...
Michael J. Yabsley, Ralph E.T. Vanstreels, Barbara C. Shock, Michaelle Purdee, Elizabeth C. Horne, Michael A. Peirce, Nola J. Parsons   +6 more
doaj   +1 more source

Assessment of a Social Media‐Based Method for Determining Raptor Diet

Ecology and Evolution, Volume 15, Issue 6, June 2025.
This study mined social media as a citizen science method to reduce the time burden and biases associated with recording accurate diet information for predators. In total, 1985 prey observations were recorded of two Australian coastal raptors and were used to produce diet profiles that were compared by region, social media platform, and against other ...
Leo Biggs, Greg S. Baxter, Stephen J. S. Debus, Neal Finch, Anysha Riggs, Hayden Houweling, Melissa Appleby, Peter J. Murray   +7 more
wiley   +1 more source

Aberraciones cromáticas en aves de la colección ornitológica del Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” Chromatic aberrations in birds of the ornithological collection of the Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”

Revista del Museo Argentino de Ciencias Naturales, 2011
En el presente trabajo se determinan las aberraciones cromáticas que afectan el plumaje de las aves en la colección ornitológica del Museo Argentino de Ciencias Naturales de Buenos Aires.
Matías Ricardo Urcola
doaj  

Does brain size matter? Linking cognitive and ecological traits to climate change vulnerability in seabirds

Functional Ecology, Volume 39, Issue 4, Page 1061-1070, April 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Understanding the mechanisms that increase a species resilience to climate change is central to predicting how they are likely to respond. One determinant of vulnerability to climate change identified in multiple taxa is the thermal range of a species' distribution.
Junghyuk Keum, Ferran Sayol, Florian Orgeret, Catharine Horswill   +3 more
wiley   +1 more source