Results 11 to 20 of about 508 (131)

Syrinx anatomy and vocalizations in New World vultures (Aves: Cathartidae): Implications for avian vocal evolution. [PDF]

J Anat
New World vultures are the only avian clade proposed to lack a syrinx and have been described as non‐vocal. Using dissection, diceCT, and histology, we demonstrate that cathartid vultures have novel syringeal features that form a syrinx and vocal characterization reveals that they produce more complex vocalizations than previously reported.
Ibarra BA, Urban CA, Legendre LJ, Clarke JA.   +3 more
europepmc   +3 more sources

Parasitaemia data and molecular characterization of Haemoproteus catharti from New World vultures (Cathartidae) reveals a novel clade of Haemosporida [PDF]

Malaria Journal, 2018
Background New World vultures (Cathartiformes: Cathartidae) are obligate scavengers comprised of seven species in five genera throughout the Americas.
Michael J. Yabsley, Ralph E. T. Vanstreels, Ellen S. Martinsen, Alexandra G. Wickson, Amanda E. Holland, Sonia M. Hernandez, Alec T. Thompson, Susan L. Perkins, Christopher J. West, A. Lawrence Bryan, Christopher A. Cleveland, Emily Jolly, Justin D. Brown, Dave McRuer, Shannon Behmke, James C. Beasley   +15 more
doaj   +2 more sources

Mitochondrial Genome Analysis of Philippine Eagles (<i>Pithecophaga jefferyi</i> Ogilvie-Grant 1896) From the Greater Mindanao Faunal Region. [PDF]

Ecol Evol
Mitogenome sequencing is a promising alternative for the genetic studies of animals. In this work, we examined the genetic diversity of the critically endangered and endemic Philippine eagles and their evolutionary relationship to other birds of prey.
Bacus MG, Gaite PLA, Acaso JT, Cambronero JM, Ramos GN, Numeron AMM, Tadena D, Labrador CC, Responte MA, Gamalo LED, Ibañez JC, Murao LAE.   +11 more
europepmc   +2 more sources

Mitogenomic and Metabarcoding Resources for the Study and Conservation of Keystone Neotropical Raptors. [PDF]

Ecol Evol
We characterized complete mitochondrial genomes for nine keystone Neotropical raptors, including four threatened and five near‐threatened species, providing essential resources for phylogenetic and conservation studies. We also developed metabarcoding primers, enabling non‐invasive monitoring of Neotropical raptors via environmental DNA.
De Panis D, Priotto O, Padró J.
europepmc   +2 more sources

A Derived Morphology of the Quadrate May Support a Previously Unrecognized Major Higher-Level Clade of Neoavian Birds. [PDF]

J Morphol
The avian quadrate plays a critical role in cranial kinesis, but few comparative studies exist of its morphological variation across higher‐level taxa. In this study, the occurrence of a markedly concave articular facet of the condylus medialis is surveyed across neornithine birds.
Mayr G.
europepmc   +2 more sources

Functional Morphology of the Pedal Musculature and Grip Force Estimation in the Red‑and‑Green Macaw (Ara chloropterus Gray, 1859). [PDF]

J Morphol
Integration of detailed hindlimb anatomy with biomechanical analyses demonstrates that pedal performance in the red‐and‐green macaw is driven by specialized muscle architecture and force distribution. Hypertrophy of digit IV flexor musculature, together with modifications of the intrinsic and extensor muscles, enhances grasping stability, climbing, and
Posso SR, Tavares VC, Barbosa ACM.
europepmc   +2 more sources

Re-evaluation of a soft crested Edmontosaurin, with implications for hadrosaurid life appearance and diversity. [PDF]

Anat Rec (Hoboken)
Abstract Hadrosaurid dinosaurs are generally regarded as “crested” or “non‐crested” depending on the presence or absence of a bony cranial crest. At least one supposedly “non‐crested” hadrosaur is known to have possessed a soft tissue cranial crest (or comb), based on an exceptionally preserved “mummified” specimen. Here we redescribe this specimen and
Sharpe HS, Bell PR, Baylatry I, Sissons R, Sullivan C.   +4 more
europepmc   +2 more sources

Holding a wing horizontal: Roles for muscles of the pectoral girdle other than the main two flight muscles. [PDF]

J Anat
This report explores which muscles of the pectoral girdle are employed to allow birds to hold their wings horizontally with a level aerofoil surface during a glide. Abstract Whilst many birds glide briefly with wings held horizontally, some species maintain this posture for extended periods during soaring.
Deeming DC, Mosto MC.
europepmc   +2 more sources

Frugivory in Raptors: New Observations from Australia and a Global Review

Birds, 2021
The diets of raptors are some of the best studied and well-known of all bird groups. Raptors are typically carnivores, hunting and feeding on vertebrates and, for some species, invertebrates. Here, we described instances of the Black Kite (Milvus migrans)
James A. Fitzsimons, Jack Leighton
doaj   +1 more source

Rapid Global Deforestation Leaves Forest-Dependent Raptors With Half of Their Suitable Habitat Remaining. [PDF]

Glob Chang Biol
We analyzed high‐resolution global data on forest change between 2001 and 2023 within the ranges of 369 forest‐dependent raptor species. On average, these species have lost 10% of forest within their ranges since 2001. Seventy‐seven species had already lost at least 15% of additional forest cover within their ranges in the latter half of the 20th ...
O'Bryan CJ, Xie Z, Li H, Buechley ER, Bader MK, Allan JR, Buij R.   +6 more
europepmc   +2 more sources