Results 41 to 50 of about 16,518 (216)
The Anatomical Record, EarlyView.Abstract In birds, the neural canal houses a variety of anatomical structures including the spinal cord, meninges, spinal vasculature, and respiratory diverticula. Among these, paramedullary diverticula and the extradural dorsal spinal vein may leave behind osteological correlates in the form of pneumatic foramina and fossae, and a bilobed geometry of ...
Jessie Atterholt +5 more
wiley +1 more source
The Orientation of Visual Space from the Perspective of Hummingbirds
Frontiers in Neuroscience, 2018 Vision is a key component of hummingbird behavior. Hummingbirds hover in front of flowers, guide their bills into them for foraging, and maneuver backwards to undock from them.
Luke P. Tyrrell +5 more
doaj +1 more source
Sentience in cephalopod molluscs: an updated assessment
Biological Reviews, EarlyView.ABSTRACT This article evaluates the evidence for sentience – the capacity to have feelings – in cephalopod molluscs: octopus, cuttlefish, squid, and nautilus. Our framework includes eight criteria, covering both whether the animal's nervous system could support sentience and whether their behaviour indicates sentience.
Alexandra K. Schnell +4 more
wiley +1 more source
Biological Reviews, EarlyView.ABSTRACT Oropharyngeal food processing exhibits a remarkable diversity among vertebrates, reflecting the evolution of specialised ‘processing centres’ associated with the mandibular, hyoid, and branchial arches. Although studies have detailed various food‐processing strategies and mechanisms across vertebrates, a coherent and comprehensive terminology ...
Daniel Schwarz +6 more
wiley +1 more source
PicoCam: High‐resolution 3D imaging of live animals and preserved specimens
Methods in Ecology and EvolutionThe PicoCam system is a multi‐camera photogrammetry rig used for generating high‐resolution 3D models of animals in the field, or preserved specimens in laboratory or museum settings.
Josh Medina +9 more
doaj +1 more source
Kinematics of hovering hummingbird flight along simulated and natural elevational gradients [PDF]
, 2003 Hovering flight is one of the most energetically demanding forms of animal locomotion. Despite the cost, hummingbirds regularly hover at high elevations, where flight is doubly challenging because of reduced air density and oxygen availability.
Altshuler, Douglas L., Dudley, Robert
core
Hummingbirds arrest their kidneys at night: diel variation in glomerular filtration rate in Selasphorus platycercus [PDF]
, 2004 © The Company of Biologists Ltd 2004Small nectarivorous vertebrates face a quandary. When feeding, they must eliminate prodigious quantities of water; however, when they are not feeding, they are susceptible to dehydration.
Hartman Bakken, B. +3 more
core +1 more source
Classifying avian drinking behaviour: ecological insights and implications in a changing world
Biological Reviews, EarlyView.ABSTRACT Water is a fundamental currency of life, and its availability significantly influences animal behaviour, physiology and distributions. However, our knowledge around the dependence on water for drinking and the direct and indirect mechanisms driving related behaviours remains partial in the context of changing climates. Here, we review patterns
Shannon R. Conradie, Marc T. Freeman
wiley +1 more source
Ecologies, 2023 Hummingbirds are charismatic fauna that provide important pollination services, including in the continental US, where 15 species regularly breed. Compared to other birds in North America, hummingbirds (family Trochilidae) have a unique exposure route to
Matthew A. Etterson +2 more
doaj +1 more source
Tracing the origins and evolution of nymphalid butterflies (Lepidoptera) in the Atlantic Forest
Ecography, EarlyView.Understanding the relative roles of diversification and dispersal is key to explaining large‐scale biogeographical patterns. Although both processes are known to shape biodiversity, their relative contributions remain understudied for many organisms. Here, we examine how these processes have jointly contributed to the exceptional diversity and endemism
Mar Repullés +7 more
wiley +1 more source