Results 51 to 60 of about 4,791 (243)

Anatomical bases of sex- and size-related acoustic variation in herring gull alarm calls [PDF]

, 2014
The hypothesis that anatomical or physiological factors can constrain the production of vocalizations is supported by an increasing number of examples from a range of taxa, where acoustic variation is related to sex, body-size or condition. In this study,
Appleby, Baayen, Ballintijn, Beani, Bee, Boeckle, Burger, Charlton, Charlton, Charlton, Coulson, Cramps, Degner, Fant, Fitch, Fitch, Fitch, Fitch, Geberzahn, Genevois, Hardouin, Johnsgard, King, Manser, Miller, Miller, Miller, Olsen, Perneger, Reby, Riede, Riede, Riede, Riede, Riede, Rüppell, Slabbekoorn, Suthers, Taylor, Teyssèdre, Tinbergen, Titze, Tsukahara, Vannoni   +43 more
core   +1 more source

The Case of the Missing Green Iguana Predators: Reviews of Ecological Literature Should Go Beyond Google Scholar

The Bulletin of the Ecological Society of America, Volume 107, Issue 2, April 2026.
Abstract Knowing about species interactions is essential for ecological research, conservation efforts, resource management, and maintaining healthy ecosystems, but many of these, such as reports of predation, may not always be published in easily located resources—if they are published at all.
Matthijs P. van den Burg, Hinrich Kaiser
wiley   +1 more source

Sex-biased parental care and sexual size dimorphism in a provisioning arthropod [PDF]

, 2015
The diverse selection pressures driving the evolution of sexual size dimorphism (SSD) have long been debated. While the balance between fecundity selection and sexual selection has received much attention, explanations based on sex-specific ecology have ...
A Herrel, AJS Weaving, AJS Weaving, AJS Weaving, AK Chippendale, AV Hedrick, B Hurlbutt, CH Hicks, CR Pavey, DJ Fairbairn, DJ Fairbairn, DJ Fairbairn, E Paradis, E Petersson, E Ranta, EJ Temeles, FD Parker, FE Kurczewski, G Halffter, G Head, G Shreeves, Gavin Shreeves, GB Monteith, GP Baerends, H Dollfuss, H Weimerskirch, HE Evans, HE Evans, HE Evans, HE Hinton, J Field, J Field, J Field, J Field, J Field, J Field, J Hunt, J Tormos, JA Powell, JA Rosenheim, JA Rosenheim, James D. J. Gilbert, JC Costa, JDJ Gilbert, JDJ Gilbert, Jeremy Field, JF Berry, JH Marden, JJ Gilbert, JR Coelho, JR Lighton, K Ralls, KM O’Neill, KM O’Neill, M Andersson, M Blösch, M Goubault, Martyn Kennedy, ME Favila, MF O’Brien, MS Iglesias, O Krüger, O Lomholdt, P Lindenfors, P Myers, P Wheeler, PB Edwards, PR Stephens, R Lande, R Shine, R Tornberg, RC Castillo del, RC Stillwell, RF Preziosi, RM Bohart, RM Cox, S Nylin, SC Stearns, SD Gaimari, Selina Brace, ST Trumbo, TE Reimchen, TH Clutton-Brock, VL Kazenas, W Groot De, WU Blanckenhorn, WU Blanckenhorn, X Han   +87 more
core   +1 more source

How much sampling is enough? Four decades of understorey bird mist‐netting across Amazonia define the minimum effort to uncover species assemblage structure

Ibis, Volume 168, Issue 2, Page 571-587, April 2026.
Mist‐net sampling comprises a key methodological component of assemblage‐wide avifaunal studies, particularly in the understorey of closed‐canopy tropical forests. To investigate mist‐net bird captures and species assemblage structure, we compiled data from 312 sites across the Pan‐Amazon.
Pilar L. Maia‐Braga, Anderson S. Bueno, Richard G. Davies, Marina F. A. Maximiano, Torbjørn Haugaasen, Marina Anciães, John G. Blake, Bette A. Loiselle, Sergio H. Borges, Juliana Menger, Sidnei Dantas, Ramiro D. Melinski, Fernando H. T. de Abreu, Roberta L. Boss, Carlos A. Peres   +14 more
wiley   +1 more source

Aportes al conocimiento de la distribución, la cría y el peso de aves de las provincias de Mendoza y San Juan, República Argentina. Segunda parte (Aves: Falconidae, Scolopacidae, Thinocoridae, Columbidae, Psittacidae, Strigidae, Caprimulgidae, Apodidae, Furnariidae, Rhinocryptidae y Tyrannidae) [PDF]

, 2001
En el presente trabajo se analiza un importante lote de aves en piel de estudio, coleccionado por William H. Partridge en las provincias de San Juan y Mendoza, República Argentina, durante los meses de noviembre y diciembre de 1963.
Bó, Nelly Alicia, Navas, Jorge R.
core   +1 more source

Nota sobre la dieta de la Lechucita Bigotona, Xenoglaux loweryi en Yambrasbamba, Amazonas

Revista Peruana de Biología, 2016
En este trabajo se dan a conocer los resultados del análisis de heces de la Lechucita Bigotona (Xenoglaux loweryi), especie endémica de Perú y en peligro de extinción según IUCN, que habita los bosques montanos húmedos de la cordillera Oriental de los ...
Alejandro Alarcón, Sam Shanee, Gabriela Huaman, Noga Shanee   +3 more
doaj   +1 more source

Distribution, density and trends of the Eurasian eagle owl (Bubo bubo) population breeding in March-Thaya floodplain forests: impact of owlets on sustainability of natural nests

Raptor Journal
In this study, we investigated the Eurasian eagle owl (Bubo bubo) breeding in lowland forests in the trans-border area between western Slovakia, eastern Austria, and southern Moravia.
Svetlíková Soňa, Svetlík Ján, Škorpíková Vlasta, Matušík Hynek, Štěpánek Pavel, Horal David, Zuna-Kratky Thomas   +6 more
doaj   +1 more source

Multidirectional chromosome painting substantiates the occurrence of extensive genomic reshuffling within Accipitriformes. [PDF]

, 2015
BACKGROUND: Previous cross-species painting studies with probes from chicken (Gallus gallus) chromosomes 1-10 and a paint pool of nineteen microchromosomes have revealed that the drastic karyotypic reorganization in Accipitridae is due to extensive ...
Beiyuan Fu, Bertrand Bed’Hom, Fengtang Yang, Gauthier Dobigny, Jinghuan Wang, Kai He, Malcolm A. Ferguson-Smith, Patricia C. M. O’Brien, Vitaly Volobouev, Weiting Su, Wenhui Nie   +10 more
core   +4 more sources

Predators and scavengers: Polar bears as marine carrion providers

Oikos, Volume 2026, Issue 1, January 2026.
Scavenging is a foraging strategy widely used across the animal kingdom and apex predators provide a large amount of energy in a food web by provisioning carrion. In the harsh environmental conditions of the Arctic, apex predators such as polar bears Ursus maritimus can provide scavenging opportunities for many species. Carrion can act as a buffer when
Holly E. L. Gamblin, Andrew E. Derocher, Evan S. Richardson, David McGeachy, James D. Roth, Nicholas W. Pilfold   +5 more
wiley   +1 more source

Case report and prey analysis of ground-nesting eagle owls (Bubo bubo) in Slovakia

Raptor Journal
In current ornithological literature, there is a general consensus that the eagle owl (Bubo bubo) is a breeder of rocky habitats in Slovakia, especially on cliffs and quarry walls, but little research to date has concentrated on cases of ground-nesting ...
Pačenovský Samuel, Šotnár Karol, Obuch Ján   +2 more
doaj   +1 more source