Results 91 to 100 of about 12,542 (257)

Enduring Gene Flow, Despite an Extremely Low Effective Population Size, Supports Hope for the Recovery of the Globally Endangered Lear’s Macaw

open access: yesDiversity
When analyzing the long-term viability of small, declining populations, it is essential to recognize that inbreeding and the erosion of genetic diversity are primarily driven by the effective population size, which is often a fraction of the total census
Erica C. Pacífico   +7 more
doaj   +1 more source

Cadaveric Study of the Juvenile Grey Heron's (Ardea cinerea) Nasal Cavity and Associated Structures Through Computed Tomography and Anatomical Sections

open access: yesVeterinary Medicine and Science, Volume 12, Issue 4, July 2026.
This study provides the first comprehensive anatomical and CT characterization of the nasal cavity of the grey heron, enabling the identification of its major components and spatial organization. Correlative evaluation of multiplanar CT images with anatomical sections proved highly effective for delineating landmarks, offering a reference for clinical ...
Natalia Roldán‐Medina   +8 more
wiley   +1 more source

Haematological reference for red-browed parrot ( Amazona rhodocorytha , Salvadori, 1890) captive in the Atlantic Forest in Eastern Brazil

open access: yesArquivo Brasileiro de Medicina Veterinária e Zootecnia
To conduct the survey were used 35 (thirty-five) red-browned parrots (A. rhodocorytha), adults, captive, of both genders and clinically healthy, belonging to the live collection of the Museum of Biology Teacher Mello Leitao, located in Santa Teresa ...
R.H. Mello   +6 more
doaj   +1 more source

Earthward Propagated Auroral Kilometric Radiation: Observations From Polar

open access: yesGeophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Auroral Kilometric Radiation (AKR), the strongest natural radio emission from Earth's magnetosphere, has been primarily observed in space. It is generally understood to propagate anti‐Earthward and be detected at large radial distances, while Earthward‐directed waves are thought to be blocked by the ionosphere. Surprisingly, AKR‐like emissions
Olha Melnychenko   +4 more
wiley   +1 more source

Evolution of NWC Transmitter Wave Power Distribution From the Topside Ionosphere Into the Inner Magnetosphere

open access: yesGeophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Ground‐based very low frequency transmitters emit signals that primarily propagate within the Earth–ionosphere waveguide, and some of their energy can propagate into the magnetosphere. Ionospheric observations from the DEMETER satellite reveal a distinct concentric rings pattern of the wave power distribution of the North West Cape transmitter
Zhiyang Xia   +8 more
wiley   +1 more source

Metastatic Renal Carcinoma in an African Grey Parrot ( Psittacus Erithacus Erithacus ) [PDF]

open access: bronze, 1996
Kenneth S. Latimer   +3 more
openalex   +1 more source

Aspergillosis in parrots

open access: yesVeterinary Record, 1991
V R, Simpson, P R, Euden
openaire   +2 more sources

Parrot

open access: yes, 2018
Elan annotation file for the audio/video files with the same name.
openaire   +1 more source

The flexible, the stereotyped and the in‐between: putting together the combinatory tool use origins hypothesis

open access: yesBiological Reviews, Volume 101, Issue 3, Page 1235-1254, June 2026.
ABSTRACT Tool use research has long made the distinction between tool using that is considered learned and flexible, and that which appears to be instinctive and stereotyped. However, animals with an inherited tool use specialisation can exhibit flexibility, while tool use that is spontaneously innovated can be limited in its expression and facilitated
Jennifer A. D. Colbourne   +1 more
wiley   +1 more source

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