Results 21 to 30 of about 16,468 (173)

Estimated and in vivo measurements of bite force demonstrate exceptionally large bite forces in parrots (Psittaciformes). [PDF]

J Anat
Bite force in parrots has been explored using data from muscle masses. The values were validated by comparison with data for bite force collected from live parrots. The parrot's reputation for a strong bite force is well founded. Abstract Jaw morphology and function determine the range of dietary items that an organism can consume.
Harrison SL, Sutton GP, Herrel A, Deeming DC.   +3 more
europepmc   +2 more sources

Cavity‐nesting birds are limited by nesting habitat in Neotropical agricultural landscapes

Biotropica, Volume 55, Issue 5, Page 1045-1057, September 2023., 2023
Although cavity‐nesting bird diversity is highest in the tropics, little is known about how tropical birds use cavities, how agriculture affects their reproductive biology, and how effective nest boxes could be as a conservation strategy in tropical agriculture.
Alison Ke, Evaristo Cedeño, Jordan Karubian, Luis Carrasco, Fernando Castillo, Nelson Gonzales, Daniel S. Karp   +6 more
wiley   +1 more source

Giant Cell Tumor of the Bone in a Scarlet Macaw (Ara macao)

Avian Diseases, 2007
A 6-mo-old female scarlet macaw (Ara macao) was presented after a 2-mo period of anorexia and weakness. The bird was reluctant to fly 1 wk before referral due to a painful left wing. Physical examination revealed a firm swelling around the left shoulder.
Amann, O., Meij, B.P., Westerhof, I., Kik, M.J.L., Lumeij, J.T., Schoemaker, N.J.   +5 more
openaire   +4 more sources

Hepatic B‐Cell Lymphoma in a Common Mynah (Acridotheres tristis): A Case Report [PDF]

Case Rep Vet Med
Background Hepatic lymphoma is rarely characterized in mynah birds, and severe hepatomegaly in this group is often interpreted in relation to iron storage disease or other metabolic hepatopathies. Case Description This report describes hepatic B‐cell lymphoma in a 14‐year‐old common mynah (Acridotheres tristis) presented with lethargy, altered ...
Hajipour P, Toutounkar Y, Dezfoulian O, Razmyar J.   +3 more
europepmc   +2 more sources

Scanning electron microscopic study on the tongue in the scarlet macaw (Ara macao)

Okajimas Folia Anatomica Japonica, 2012
The dorsal lingual surface of scarlet macaw (Ara macao) was examined by scanning electron microscopy. Macroscopically, the lingual apex of the scarlet macaw had a lip-like shape. Three parts were distinguished in the dorsal surface of the tongue: the apex, body, and root of the tongue.
EMURA, Shoichi, OKUMURA, Toshihiko, CHEN, Huayue   +2 more
openaire   +3 more sources

Proventricular Dilatation Disease Associated with Avian Bornavirus in a Scarlet Macaw ( Ara Macao ) [PDF]

Journal of Veterinary Diagnostic Investigation, 2010
A case of proventricular dilatation disease is described in a scarlet macaw( Ara macao) from clinical presentation to diagnosis with molecular methods. The initial clinical signs were depression progressing to head pressing over several days. A leukocytosis with toxic heterophil changes, hypoalbuminemia, and increased serum activity of aspartate ...
Dominique L, Keller, Kirsi S, Honkavuori, Thomas, Briese, W Ian, Lipkin, Anantharaman, Muthuswamy, Howard, Steinberg, Kurt K, Sladky   +6 more
openaire   +2 more sources

The Aztec Feather Shield in Vienna: Problems of Conservation

Nuevo mundo - Mundos Nuevos, 2006
The 450 year old feather shield “Ahuizotl” , formerly kept as part of the Collections of Ambras Castle, is not only one of the most significant, but also one of the most delicate objects of the Museum of Ethnology in Vienna.
Walter Baumgartner
doaj   +1 more source

Age Difference, Not Food Scarcity or Sibling Interactions, May Drive Brood Reduction in Wild Scarlet Macaws in Southeastern Peru

Diversity
Avian brood reduction was initially thought to be driven by insufficient food supply. Now it is more commonly considered a consequence of asynchronous hatching and resulting siblicide, direct filial infanticide (where parents kill specific chicks) or ...
Gabriela Vigo-Trauco, Gustavo Martínez-Sovero, Donald J. Brightsmith   +2 more
doaj   +1 more source

Importance of using genetic data to inform conservation captive breeding: A tale of two species of threatened macaws (Ara spp.)

Conservation Science and Practice, Volume 8, Issue 10, October 2026.
Unmanaged captive populations of threatened species often harbor hidden genetic risks, so using genomic tools, we audited a large private macaw collection and uncovered extensive hybridization and high inbreeding. Our findings provide an actionable framework for how routine genetic screening can be used to mitigate these risks, manage captive breeding ...
George Olah, Jeff A. Johnson, Jeremy S. Johnson, Donald J. Brightsmith, Janice D. Boyd   +4 more
wiley   +1 more source

Fatal Paratanaisia bragai (Digenea: Eucotylidae) infection in scarlet macaws (Ara macao) in Costa Rica [PDF]

Acta Parasitologica, 2015
AbstractWe report on four fatal cases of renal infection due to Paratanaisia bragai in scarlet macaws (Ara macao) from two rescue centres in Costa Rica. At necropsy, birds had severe dehydration and cachexia. Two birds had hydropericardium, oedematous lungs, and liver lipidic degeneration.
Alfaro Alarcón, A, Morales, Ja, VENEZIANO, VINCENZO, Santoro, M.   +3 more
openaire   +5 more sources