Calling rhythm as a predictor of the outcome of vocal interactions: flight departure in pale-winged starling pairs
- Hausberger, Martine, Giacalone, Aline, Harmand, Mariane, Craig, Adrian J F K, Henry, Laurence
- Authors: Hausberger, Martine , Giacalone, Aline , Harmand, Mariane , Craig, Adrian J F K , Henry, Laurence
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449283 , vital:74808 , https://doi.org/10.1007/s00114-019-1658-1
- Description: Vocal communication plays an important role in the regulation of social interactions and the coordination of activities in many animal species. Synchrony is an essential part of the establishment and maintenance of pair bonds, but few reports have investigated decision-making at the pair level. We investigated temporal characteristics of call exchanges in pale-winged starlings (Onychognathus nabouroup) that could predict whether one, two, or neither members of a pair would take off. Our analysis of these interactions revealed that the overall rhythm of a call exchange, as well as the acceleration towards the end of an interaction, were significantly associated with the type of behavioural outcome. Faster rhythms were associated with higher probabilities that both birds would fly away. Our results confirm the findings of previous studies showing that higher rates of alarm calls indicate imminent departure and highlight the relationship between temporal features of vocal interactions and their outcome.
- Full Text:
- Date Issued: 2020
- Authors: Hausberger, Martine , Giacalone, Aline , Harmand, Mariane , Craig, Adrian J F K , Henry, Laurence
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449283 , vital:74808 , https://doi.org/10.1007/s00114-019-1658-1
- Description: Vocal communication plays an important role in the regulation of social interactions and the coordination of activities in many animal species. Synchrony is an essential part of the establishment and maintenance of pair bonds, but few reports have investigated decision-making at the pair level. We investigated temporal characteristics of call exchanges in pale-winged starlings (Onychognathus nabouroup) that could predict whether one, two, or neither members of a pair would take off. Our analysis of these interactions revealed that the overall rhythm of a call exchange, as well as the acceleration towards the end of an interaction, were significantly associated with the type of behavioural outcome. Faster rhythms were associated with higher probabilities that both birds would fly away. Our results confirm the findings of previous studies showing that higher rates of alarm calls indicate imminent departure and highlight the relationship between temporal features of vocal interactions and their outcome.
- Full Text:
- Date Issued: 2020
Common Starling (Sturnus vulgaris Linnaeus, 1758)
- Authors: Craig, Adrian J F K
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/465580 , vital:76622 , ISBN 978-1-78924-208-9 , https://doi.org/10.1079/9781789242065.0009
- Description: This chapter describes the terminology, nomenclature, morphology, geographical distribution, diet, physiology, reproduction, behaviour, ecology, habitats, invasion patterns, environmental impact, control and human use of the common starling (Sturnus vulgaris).
- Full Text:
- Date Issued: 2020
- Authors: Craig, Adrian J F K
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/465580 , vital:76622 , ISBN 978-1-78924-208-9 , https://doi.org/10.1079/9781789242065.0009
- Description: This chapter describes the terminology, nomenclature, morphology, geographical distribution, diet, physiology, reproduction, behaviour, ecology, habitats, invasion patterns, environmental impact, control and human use of the common starling (Sturnus vulgaris).
- Full Text:
- Date Issued: 2020
Counting waterbirds on holiday: a snapshot for one Eastern Cape estuary
- Mullins, R Lorraine G, Craig, Adrian J F K
- Authors: Mullins, R Lorraine G , Craig, Adrian J F K
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449375 , vital:74815 , https://doi.org/10.2989/00306525.2020.1783383
- Description: Over a ten-year period, each December the same observer counted waterbirds on the same stretch of the Kariega River in the Eastern Cape, South Africa. The site surveyed is dominated by waders, with variable numbers of other feeding guilds. Piscivorous birds in particular are poorly represented. Differences in the numbers of birds and species recorded, both within a single month and between years, are only partly explicable by environmental conditions on this permanently open estuary. From our comparison with nearby sites, we conclude local movements between rivers and pans in the region must occur regularly over short time intervals.
- Full Text:
- Date Issued: 2020
- Authors: Mullins, R Lorraine G , Craig, Adrian J F K
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449375 , vital:74815 , https://doi.org/10.2989/00306525.2020.1783383
- Description: Over a ten-year period, each December the same observer counted waterbirds on the same stretch of the Kariega River in the Eastern Cape, South Africa. The site surveyed is dominated by waders, with variable numbers of other feeding guilds. Piscivorous birds in particular are poorly represented. Differences in the numbers of birds and species recorded, both within a single month and between years, are only partly explicable by environmental conditions on this permanently open estuary. From our comparison with nearby sites, we conclude local movements between rivers and pans in the region must occur regularly over short time intervals.
- Full Text:
- Date Issued: 2020
Pied Crows in the Eastern Cape: what bird club records reveal
- Craig, Adrian J F K, Hulley, Patrick E
- Authors: Craig, Adrian J F K , Hulley, Patrick E
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449461 , vital:74823 , https://doi.org/10.2989/00306525.2020.1782498
- Description: Published records by bird clubs in Port Elizabeth, Kenton-on-Sea and Grahamstown (Makhanda) show that until 1980 Pied Crows were seldom recorded in this sector of the Eastern Cape, South Africa. Port Elizabeth, and apparently also East London, was colonised by Pied Crows in the 1980s, whereas the first records for Kenton-on- Sea and Port Alfred on the coast, and also inland in the Grahamstown (Makhanda) area, were after 1990. Since 2010, this species has been recorded more often both on the coast and in the adjacent inland regions. However, records of both Cape Crows and White-necked Ravens have also increased over the same period, suggesting that there has been no species replacement among the local corvids. Citizen-science data provide valuable information on changes in distribution and abundance of this bird species.
- Full Text:
- Date Issued: 2020
- Authors: Craig, Adrian J F K , Hulley, Patrick E
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449461 , vital:74823 , https://doi.org/10.2989/00306525.2020.1782498
- Description: Published records by bird clubs in Port Elizabeth, Kenton-on-Sea and Grahamstown (Makhanda) show that until 1980 Pied Crows were seldom recorded in this sector of the Eastern Cape, South Africa. Port Elizabeth, and apparently also East London, was colonised by Pied Crows in the 1980s, whereas the first records for Kenton-on- Sea and Port Alfred on the coast, and also inland in the Grahamstown (Makhanda) area, were after 1990. Since 2010, this species has been recorded more often both on the coast and in the adjacent inland regions. However, records of both Cape Crows and White-necked Ravens have also increased over the same period, suggesting that there has been no species replacement among the local corvids. Citizen-science data provide valuable information on changes in distribution and abundance of this bird species.
- Full Text:
- Date Issued: 2020
The birds of Fort Fordyce Reserve, Eastern Cape
- Craig, Adrian J F K, Hulley, Patrick E
- Authors: Craig, Adrian J F K , Hulley, Patrick E
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449897 , vital:74862 , https://doi.org/10.15641/bo.v11i0.687
- Description: The avifauna of this forest reserve has been surveyed, based on observations and mist-netting over a ten-year period. We have recorded 175 species, of which 56 are considered" true" forest birds in this region. These include four summer migrants, and four occasional visitors; the others are likely to be resident. Four species of conservation concern, the Knysna Woodpecker, African Crowned Eagle, Lanner Falcon and Bush Blackcap probably nest within the protected area.
- Full Text:
- Date Issued: 2020
- Authors: Craig, Adrian J F K , Hulley, Patrick E
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449897 , vital:74862 , https://doi.org/10.15641/bo.v11i0.687
- Description: The avifauna of this forest reserve has been surveyed, based on observations and mist-netting over a ten-year period. We have recorded 175 species, of which 56 are considered" true" forest birds in this region. These include four summer migrants, and four occasional visitors; the others are likely to be resident. Four species of conservation concern, the Knysna Woodpecker, African Crowned Eagle, Lanner Falcon and Bush Blackcap probably nest within the protected area.
- Full Text:
- Date Issued: 2020
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