Results 31 to 40 of about 10,807 (290)

Experimental resource pulses influence social-network dynamics and the potential for information flow in tool-using crows [PDF]

open access: yes, 2015
The project was funded by the Biotechnology and Biological Sciences Research Council (David Phillips Fellowship to C.R.: grant numbers BB/G023913/1 and /2), with contributions for genetic analyses by the Smithsonian Conservation Biology Institute’s ...
Fleischer, Robert   +8 more
core   +1 more source

Neurons in the Hippocampus of Crows Lack Responses to Non-spatial Abstract Categories

open access: yesFrontiers in Systems Neuroscience, 2018
Lesion studies suggest a role of the avian hippocampus in spatial and episodic memory. However, whether the avian hippocampus is also involved in processing categorical information and non-spatial working memory contents remains unknown.
Helen M. Ditz   +2 more
doaj   +1 more source

Pomen in vplivi vran, s poudarkom na sivi vrani (Corvus cornix), v (sub)urbanem okolju

open access: yesActa Silvae et Ligni, 2014
In recent decades, the increase in number of crows, particularly the hooded crow (Corvus cornix), in the (sub)urban environment has resulted in the ever-increasing conflicts with humans.
Boštjan Pokorny   +2 more
doaj   +1 more source

Intracellular Diversity of WNV within Circulating Avian Peripheral Blood Mononuclear Cells Reveals Host-Dependent Patterns of Polyinfection

open access: yesPathogens, 2023
Arthropod-borne virus (arbovirus) populations exist as mutant swarms that are maintained between arthropods and vertebrates. West Nile virus (WNV) population dynamics are host-dependent.
Dalit Talmi-Frank   +12 more
doaj   +1 more source

Crows control working memory before and after stimulus encoding

open access: yesScientific Reports, 2020
The capacity of working memory is limited and this limit is comparable in crows and primates. To maximize this resource, humans use attention to select only relevant information for maintenance. Interestingly, attention-cues are effective not only before
Erica Fongaro, Jonas Rose
doaj   +1 more source

Sequential Tool Use in Great Apes [PDF]

open access: yes, 2012
Sequential tool use is defined as using a tool to obtain another non-food object which subsequently itself will serve as a tool to act upon a further ( sub) goal. Previous studies have shown that birds and great apes succeed in such tasks.
Josep Call   +11 more
core   +2 more sources

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

open access: yes, 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 ...
Breen, Alexis J.   +37 more
core   +1 more source

Grass Management Regimes Affect Grasshopper Availability and Subsequently American Crow Activity at Airports

open access: yesHuman-Wildlife Interactions, 2017
With large expanses of open vegetation, airports serve as major attractants for numerous bird species, such as the American crow (Corvus brachyrhynchos), which can lead to high risk of bird–aircraft collision.
Laura A. Kennedy, Ken A. Otter
doaj   +1 more source

Three Versions of Crow Omens

open access: yesHistory of Science in South Asia, 2022
This paper examines three versions of crow omens composed in Sanskrit verses of anuṣṭubh metre from two different sources, one Brahmanic, Gārgīyajyotiṣa, and the other Buddhist, Śārdūlakarṇāvadana. Their similarities in language and content leave little
Kenneth Zysk
doaj   +1 more source

Studies on the foraging behaviour of New Caledonian crows [PDF]

open access: yes, 2018
The evolutionary origins of tool use are puzzling. To understand why it has evolved in certain species and not in others, we need to study the environment in which the use of tools is beneficial over alternative foraging modes. The New Caledonian crow is
van der Wal, Jessica Eva Megan
core   +1 more source

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