Results 11 to 20 of about 320,247 (150)

Modifications to the Aesop's Fable paradigm change New Caledonian crow performances. [PDF]

open access: yesPLoS ONE, 2014
While humans are able to understand much about causality, it is unclear to what extent non-human animals can do the same. The Aesop's Fable paradigm requires an animal to drop stones into a water-filled tube to bring a floating food reward within reach ...
Corina J Logan   +4 more
doaj   +3 more sources

Little evidence that Eurasian jays protect their caches by responding to cues about a conspecific’s desire and visual perspective

open access: yeseLife, 2021
Eurasian jays have been reported to protect their caches by responding to cues about either the visual perspective or current desire of an observing conspecific, similarly to other corvids.
Piero Amodio   +4 more
doaj   +1 more source

Increase of avian Plasmodium circumflexum prevalence, but not of other malaria parasites and related haemosporidians in northern Europe during the past 40 years

open access: yesMalaria Journal, 2022
Background Malaria is a health problem not only in human and veterinary medicine, but also in wildlife. Several theoretical studies have suggested that avian malaria transmission might be increasing in Europe.
Gediminas Valkiūnas   +2 more
doaj   +1 more source

The elusive perspective of a food thief

open access: yeseLife, 2021
Eurasian jays fail to take into account the point of view and desire of other jays when hiding food they can eat later.
Claudia Zeiträg, Ivo Jacobs
doaj   +1 more source

Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement

open access: yesGeophysical Monograph Series, Page 27-82., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm   +2 more
wiley  

+1 more source

Long-Term Winter Population Trends of Corvids in Relation to Urbanization and Climate at Northern Latitudes

open access: yesAnimals, 2022
Corvids (crows, magpies, jays) live in a close association with humans, and therefore knowledge about their population status and changes will be an essential part of monitoring the quality of urban environments.
Jukka Jokimäki   +2 more
doaj   +1 more source

Eurasian jays do not copy the choices of conspecifics, but they do show evidence of stimulus enhancement [PDF]

open access: yesPeerJ, 2016
Corvids (birds in the crow family) are hypothesised to have a general cognitive tool-kit because they show a wide range of transferrable skills across social, physical and temporal tasks, despite differences in socioecology.
Rachael Miller   +3 more
doaj   +2 more sources

Evaluation of Spatio-Temporal Patterns of Predation Risk to Forest Grouse Nests in the Central European Mountain Regions

open access: yesAnimals, 2021
We evaluated the spatiotemporal patterns of predation risk on black grouse nests using artificial nests that were monitored by camera traps in mountain areas with a small extant (Ore Mts.) and already extinct (Jeseníky Mts.) black grouse population.
Jan Cukor   +6 more
doaj   +1 more source

How the Eurasian jay expands its color palette by optimizing multiple scattering

open access: yes, 2022
The production of structural color in nature is still incompletely understood. Multiple scattering exerts critical effects on synthetic disordered systems, but its effects on structural colors in natural materials are not yet well known.
Jeon, Deok‐Jin   +6 more
core   +1 more source

Spatial patterns of habitat distribution of Corvidae (the case of urban-rural gradient)

open access: yesVìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Bìologìâ, Ekologìâ, 2016
The spatial distribution and abundance of Corvidae species in Zhytomyr region was studied in terms of the urban-rural gradient. We selected Rook (Corvus frugilegus L.), Eurasian Jackdaw (C. monedula L.), Hooded Crow (C. cornix L.), Common Raven (C. corax
А. A. Zimaroyeva   +2 more
doaj   +1 more source

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