Results 91 to 100 of about 207,215 (337)

Spatial and temporal variation in population trends in a long-distance migratory bird [PDF]

, 2010
Over the past three decades, evidence has been growing that many Afro-Palaearctic migratory bird populations have suffered sustained and severe declines.
Both, Both, Burfield, Coombes, Corbet, Cramp, Crick, Gill, Gill, Gillings, Gillings, Gunnarsson, Hein, Hein, Hewson, Huppop, Keller, Marra, Mullie, Mustin, Møller, Møller, Newson, Newton, Norman, Peach, Peach, Risely, Robinson, Salewski, Salewski, Sanderson, Szep, Visser, Ward   +34 more
core   +1 more source

Osteological correlates of the respiratory and vascular systems in the neural canals of Mesozoic ornithurines Ichthyornis and Janavis

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, M. Grace Burton, Mathew J. Wedel, Juan Benito, Ellen Fricano, Daniel J. Field   +5 more
wiley   +1 more source

Climate in Europe and Africa Sequentially Shapes the Spring Passage of Long-Distance Migrants at the Baltic Coast in Europe

Diversity
Since the 1980s, earlier European springs have led to the earlier arrival of migrant passerines. We predict that arrival is related to a suite of climate indices operating during the annual cycle (breeding, autumn migration, wintering, spring migration ...
Magdalena Remisiewicz, Les G. Underhill
doaj   +1 more source

Role of soft tissue and bone interactions in the developmental integration and modularity of the skull in neural crest‐specific gap junction alpha‐1 knockout mice

The Anatomical Record, EarlyView.
Abstract The vertebrate skull is composed of bones derived from neural crest cells and mesoderm. The evolutionary capacity of the skull has been linked, in part, to the emergence of neural crest cells; however, this increased capacity for evolutionary change requires that variation within neural crest‐ and mesoderm‐derived bones remains partly ...
Alyssa C. Moore, Madeline Tourigny, Diana Quinonez, Kevin Barr, Matthew W. Grol, Katherine E. Willmore   +5 more
wiley   +1 more source

Radar studies of bird migration [PDF]

Observations of bird migration with NASA radars were made at Wallops Island, Va. Simultaneous observations were made at a number of radar sites in the North Atlantic Ocean in an effort to discover what happened to those birds that were observed leaving ...
Williams, J. M., Williams, T. C.
core   +1 more source

Bird migration [PDF]

Journal of Comparative Physiology A, 2017
Franz, Bairlein, Wolfgang, Wiltschko
openaire   +2 more sources

Gonadal development in scorpion mud‐turtles, Kinosternon scorpioides, in a controlled environment

The Anatomical Record, EarlyView.
Stage 20 was identified as the critical point for gonadal differentiation in Kinosternon scorpioides, providing key insights into sex determination. These findings enhance conservation strategies by supporting reproductive management and population viability in both in situ and ex situ programs. Abstract Research on gonadal development including sexual
Brenda Braga, Verônica Oliveira‐Bahia, Maria Auxiliadora Ferreira, José Ribamar Felipe Marques, Diva Araújo Guimarães   +4 more
wiley   +1 more source

Avian spring migration at the east Adriatic coast: coastal and sea-crossing dynamics of intensity, timing, and flight directions

Movement Ecology
Background Each spring, migratory birds converge along the Croatian coast from various directions, creating a dynamic intersection of flight paths.
Simon Hirschhofer, Peter Ranacher, Barbara Helm, Davor Ćiković, Robert Weibel, Sanja Barišić, Vesna Tutiš, Louie Taylor, Maja Bjelić Laušić, Baptiste Schmid   +9 more
doaj   +1 more source

Current Status of the Northern Saw-whet Owl (Aegolius acadicus) in Arkansas [PDF]

, 2016
The secretive Northern Saw-whet Owl (Aegolius acadicus) is believed to be much more widespread during fall and winter than previously thought. Of the few places in the southern United States conducting research on this species, all have been successful ...
Pruitt, Mitchell L., Smith, Kimberly G.
core   +2 more sources

Robust sound event detection in bioacoustic sensor networks

, 2019
Bioacoustic sensors, sometimes known as autonomous recording units (ARUs), can record sounds of wildlife over long periods of time in scalable and minimally invasive ways.
Bello, Juan Pablo, Farnsworth, Andrew, Kelling, Steve, Lostanlen, Vincent, Salamon, Justin   +4 more
core   +1 more source