scholarly journals Temporary bigamy among Carrion Crows Corvus corone as a process of mate change

2015 ◽  
Vol 64 (2) ◽  
pp. 243-249 ◽  
Author(s):  
Makiko NAKAMURA ◽  
Makiko TAKENAKA
Keyword(s):  
Corvus Corone ◽  
Mate Change

Mate Change Enhances Duetting Activity in the Siamang Gibbon (Hylobates Syndactulus)

Behaviour ◽  
1986 ◽  
Vol 96 (1-2) ◽  
pp. 17-27 ◽  
Author(s):  
Thomas Geissmann
Keyword(s):  
Pair Bonding ◽  
Time Period ◽  
Bonding Effect ◽  
Before And After ◽  
Mate Change ◽  
The Status ◽  
Partner Exchange ◽  
Directed Learning ◽  
Singing Activity

AbstractSiamang gibbons produce long and complex duet songs. The hypothesis that duetting may act as advertisement of the presence and the status of a mated pair has repeatedly been suggested for duetting birds. If a pair bonding effect of the duet is actually attained through a partner-directed learning effort resulting in a pair-specific duet, the learning investment should be concentrated into a time period as short as possible in order to avoid competitors. Therefore, after the formation of a new pair, an increase of singing activity should be expected. In order to test this prediction, the singing activity of a pair of captive siamang before and after a partner exchange was compared. In the newly formed pair, an increase in singing activity was observed. Additional observations on a second new pair show a similar trend. In this case, both new mates remained in their familiar place so that their singing activity was unlikely to be affected by the process of establishing a new territory.

scholarly journals Is caching the key to exclusion in corvids? The case of carrion crows (Corvus corone corone)

2011 ◽  
Vol 15 (1) ◽  
pp. 73-82 ◽  
Author(s):  
Sandra Mikolasch ◽  
Kurt Kotrschal ◽  
Christian Schloegl
Keyword(s):  
Corvus Corone

scholarly journals Observation of female-male mounting in the carrion crow

2020 ◽  
Author(s):  
Claudia A.F. Wascher ◽  
Friederike Hillemann
Keyword(s):  
Male Partner ◽  
Carrion Crow ◽  
Quantitative Studies ◽  
Sexual Behaviours ◽  
Corvus Corone ◽  
Term Pair

AbstractWe report an observation of a female carrion crow, Corvus corone corone, mounting her long-term, pair-bonded, male partner. The report highlights the importance of more systematic quantitative studies of rare socio-sexual behaviours, which could provide important insights into the evolution of non-conceptive socio-sexual behaviours.

Geometry and scanning behaviour in hooded crow(Corvus corone cornix)flocks

1991 ◽  
Vol 58 (2) ◽  
pp. 129-133
Author(s):  
Nicola Saino ◽  
Alberto Coraluppi ◽  
Marta Contini
Keyword(s):  
Hooded Crow ◽  
Corvus Corone

Aggressive behaviour in Montagu’s harrier Circus pygargus during the courtship period

Biologia ◽  
2006 ◽  
Vol 61 (5) ◽  
Author(s):  
Jarosław Wiącek
Keyword(s):  
Aggressive Behaviour ◽  
Aggressive Interactions ◽  
Circus Pygargus ◽  
Circus Aeruginosus ◽  
Corvus Corone ◽  
Montagu’S Harrier ◽  
Asio Flammeus ◽  
Hooded Crows ◽  
First Time ◽  
Montagu's Harrier

AbstractAggressive behaviour of Montagu’s harrier was observed during the pre-laying period in the 1992–1995 seasons on the calcareous marshes of Chelm in Eastern Poland. In total, 435 flights performed by 24 pairs of individually marked harriers were analysed. All flights were performed in relation to the territory of defence. Males performed 61% of aggressive interactions while females performed 39%. Intraspecific and interspecific aggression comprising direct attacks (58%), escorts (13%), pursuits (28%) and “mirror behaviour” (1%) were described for the first time. Interspecific aggressive behaviour occurred only near territory boundaries. The main intruders were marsh harriers Circus aeruginosus breeding on the same marshes. Occasionally, harriers attacked curlews Numenius arquata, short-eared owls Asio flammeus, magpies Pica pica, hooded crows Corvus corone cornix, common buzzards Buteo buteo or hobbies Falco subbuteo. Four cases of communal mobbing were observed. Three to five males from the neighbourhood attacked the intruders together. Intraspecific aggressive behaviour was observed in the pair territory, near the boundary or at a distance of up to 100 m from the defended area. Aggressive interactions performed by both sexes were more frequent towards birds of the same sex. Females defended their territories more aggressively against females. Similarly, males were more aggressive against males. All cases of aggressive behaviour were observed near harrier territories. Aggressive relations between birds outside breeding territories or when foraging around marshes were not observed.

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