Results 1 to 10 of about 158,310 (213)

Sequencing of the complete mitochondrial genome of the common raven Corvus corax (Aves: Corvidae) confirms mitogenome-wide deep lineages and a paraphyletic relationship with the Chihuahuan raven C. cryptoleucus. [PDF]

open access: yesPLoS ONE, 2017
Previous studies based on single mitochondrial markers have shown that the common raven (Corvus corax) consists of two highly diverged lineages that are hypothesised to have undergone speciation reversal upon secondary contact. Furthermore, common ravens
Arild Johnsen   +3 more
doaj   +2 more sources

Vocal recognition of a nest-predator in black grouse [PDF]

open access: yesPeerJ, 2019
Corvids count among the important predators of bird nests. They are vocal animals and one can expect that birds threatened by their predation, such as black grouse, are sensitive to and recognize their calls.
Richard Policht   +6 more
doaj   +2 more sources

A spatially explicit modeling framework to guide management of subsidized avian predator densities

open access: yesEcosphere, 2023
Anthropogenic resource subsidization across western ecosystems has contributed to widespread increases in generalist avian predators, including common ravens (Corvus corax; hereafter, raven).
Shawn T. O'Neil   +8 more
doaj   +1 more source

Isotopic analysis reveals landscape patterns in the diet of a subsidized predator, the common raven

open access: yesEcological Solutions and Evidence, 2021
Anthropogenic subsidies to native predators can have cascading effects on sensitive prey populations, but the spatial mechanisms behind these effects are often unknown.
Seth Harju   +3 more
doaj   +1 more source

[Considerations on an alleged specimen of a Tingitan raven Corvus corax tingitanus Irby, 1874 from the Arrigoni degli Oddi Collection]

open access: yesRivista Italiana di Ornitologia - Research in Ornithology, 2021
[The Common raven Corvus corax is an holoartic species, divided into 12 subspecies, three of which are present in Italy. Based on the most recent systematics, the sub-specific attribution of the Italian populations has been discussed.
Fulvio Fraticelli, Carla Marangoni
doaj   +1 more source

Threat-sensitive anti-predator defence in precocial wader, the northern lapwing Vanellus vanellus [PDF]

open access: yes, 2016
Birds exhibit various forms of anti-predator behaviours to avoid reproductive failure, with mobbing—observation, approach and usually harassment of a predator—being one of the most commonly observed. Here, we investigate patterns of temporal variation in
A Amar   +97 more
core   +1 more source

Efficacy of CPTH-Treated Egg Baits for Removing Ravens

open access: yesHuman-Wildlife Interactions, 2017
Human-altered landscapes have provided resource subsidies for common ravens (Corvus corax) resulting in a substantial increase in raven abundance and distribution throughout the United States and Canada in the past 25 years.
Peter S. Coates   +2 more
doaj   +1 more source

Adaptations of co-vocalisation of non-owl birds with Eagle Owls (Bubo bubo) in natural and climatic conditions of Mordovia

open access: yesИзвестия высших учебных заведений. Поволжский регион: Естественные науки, 2023
Background. From the standpoint of studying relationships in the “predatorprey” system, joint vocalizations of predator birds and their potential prey are of particular importance.
A.V. Andreychev   +2 more
doaj   +1 more source

Basic blood biochemical parameters of wild common ravens (Corvus corax) [PDF]

open access: yesBiodiversity Data Journal, 2023
Baseline haematological and biochemical blood parameters in healthy wild birds are key to managing wild populations and to saving critically ill individuals. This knowledge is crucial for the care, rehabilitation and the release of birds after treatment in wildlife rescue centres.
Chaprazov,Tsvetan   +4 more
openaire   +4 more sources

Factors affecting the spatial distribution and breeding habitat of an insular cliff-nesting raptor community [PDF]

open access: yes, 2018
The specific spatial distribution and habitat association—strongly influenced by environmental factors or competitive interactions—are major issues in ecology and conservation.
Rodríguez, Airam   +3 more
core   +1 more source

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