Results 81 to 90 of about 1,119,524 (214)

Underestimation of avian diversity in the Tumbesian hotspot: Sampling gaps and conservation challenges

open access: yesConservation Science and Practice, EarlyView.
This study provides the first comprehensive reassessment of avian diversity in the Tumbesian region in over 30 years, documenting 931 species and identifying significant sampling gaps driven by geographic accessibility. We reveal a critical misalignment between biodiversity value and current protection coverage, particularly in humid forests which ...
Anabel Cueva‐Agila   +3 more
wiley   +1 more source

The origin and the fate of the cranial ribs in the avian chondrocrania

open access: yesJournal of Basic and Applied Zoology, 2012
The origin and the fate of the cranial ribs in three birds; Streptopelia senegalensis aegyptiaca, Pterocles alchata caudacutus and Passer domesticus niloticus, have been described. The requested characters for true cranial ribs are determined.
M.M. Zaher, A.M. Riad
doaj   +1 more source

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

open access: yesJournal of Anatomy, EarlyView.
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.
Bradley A. Ibarra   +3 more
wiley   +1 more source

Avipox strain diversity in Passer domesticus, introducing a simple descriptive nomenclature.

open access: yes, 2016
Avipox strain diversity in Passer domesticus, introducing a simple descriptive nomenclature.
Martina Ferraguti (423378)   +11 more
core   +1 more source

Listado y anotaciones sobre la historia natural de las aves del litoral de San Andrés de Tumaco, Nariño (Colombia)

open access: yesBiota Colombiana, 2013
We present an updated list of the birds recorded for the coastal area of San Andrés de Tumaco, Nariño (Colombia), from observations and collecting records during several visits to the area, review of ornithological collections and available bibliographic
Johanna I. Murillo-Pacheco   +2 more
doaj   +1 more source

Defecation in preparation for ecdysis drives microplastic clearance in cricket nymphs

open access: yesPhysiological Entomology, EarlyView.
In preparation for ecdysis, cricket nymphs cease feeding and gradually clear their gut contents via frass production, which removes most ingested MPs from their digestive tract. Following exoskeletal moulting, the foregut lining, including any remaining MPs, is shed and excreted alongside frass approximately 6 h later.
Jennie E. Mills   +3 more
wiley   +1 more source

Presence of exotic birds in San Luis Potosi city, Mexican Plateau

open access: yesRevista Bio Ciencias, 2015
We recorded 12 exotic bird species in San Luis Potosi, Mexico and adjacent areas. Obtained data were collected during the period August 2012 to August 2013.
Ramírez-Albores, J.E., Chapa-Vargas, L.
doaj   +1 more source

An experimental examination of interindividual variation in feather corticosterone content in the house sparrow, Passer domesticus in southeast Australia.

open access: yesGeneral and Comparative Endocrinology, 2017
Non-invasive techniques for measuring glucocorticoids (GCs) have become more prevalent, due to the advantage of eliminating the effects of animal disturbance on GC levels and their potential to provide an integrated, historic estimate of circulating GC ...
Yaara Aharon-Rotman   +3 more
semanticscholar   +1 more source

Architecture of the cardiac transverse–axial tubular system across different mammalian species

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Mammalian species differ in ventricular TATS architecture, and cytoplasmic distance to the nearest TATS element covaries with lifespan, body mass, and resting heart rate. Abstract Cardiac excitation–contraction coupling relies on a pancellular network of regular cardiomyocyte surface membrane invaginations, termed the transverse ...
Joachim Greiner   +10 more
wiley   +1 more source

Humans are not unique: difficult birth is common in placental mammals

open access: yesBiological Reviews, Volume 101, Issue 5, Page 2214-2239, October 2026.
ABSTRACT Human childbirth is widely presumed to be uniquely difficult and dangerous compared to birth in other mammals. Tight fetopelvic proportions can result in obstructed labour and contribute to high rates of maternal and neonatal mortality. Ideas summarised under the ‘obstetrical dilemma’ have contributed to this assumption by explaining difficult
Nicole D. S. Grunstra
wiley   +1 more source

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