Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/101741
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- Title
- Specific targeting of host individuals by a kleptoparasitic bird
- Related
- Behavioral ecology and sociobiology, Vol. 63, Issue 8 (2009), p.1119-1126
- DOI
- 10.1007/s00265-009-0766-x
- Publisher
- Springer
- Date
- 2009
- FoR/RFCD Code(s)
-
050200 Environmental Science and Management
060200 Ecology
- Author/Creator
- Ridley, Amanda R
- Author/Creator
- Child, Matthew
- Description
- Kleptoparasitism is a tactic used to acquire food opportunistically and has been shown to provide several benefits, including greater food intake rate and the acquisition of items not normally available during selfforaging. Host individuals may differ in their ability to defend themselves against kleptoparasitic attacks and therefore identifying those host individuals that are particularly vulnerable to attack could both provide energetic benefits and increase the efficiency of kleptoparasitism as a foraging strategy. Here, we show that the kleptoparasitic fork-tailed drongo (Dicrurus adsimilis) specifically targets juveniles when following groups of cooperatively breeding pied babblers (Turdoides bicolor). Drongos give alarm calls upon sighting a predator, thus providing extra predator vigilance to foraging pied babblers. However, drongos also use alarm calls to steal food items. During kleptoparasitic attacks, drongos give false alarm calls and then swoop down to steal food items dropped by alarmed babblers. Juvenile pied babblers are particularly vulnerable to attack because they (a) spend a longer period handling prey items prior to consumption and (b) respond to alarm calls primarily by immediately moving to cover, in contrast to adults who respond by looking up and visually scanning the surrounding area. Drongos attack juvenile babblers significantly more often than adults, with attacks on juveniles more likely to result in the successful procurement of a food item. This patterns of attack suggests that drongos are able to differentiate between individuals of different age when targeting pied babblers, thus increasing the efficiency of kleptoparasitism as a foraging strategy.
- Description
- 8 page(s)
- Subject Keyword
- 050200 Environmental Science and Management
- Subject Keyword
- 060200 Ecology
- Subject Keyword
- kleptoparasitism
- Subject Keyword
- fork-tailed drongo
- Subject Keyword
- pied babbler
- Subject Keyword
- targeting behaviour
- Subject Keyword
- alarm call response
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Brain, Behaviour and Evolution
- Identifier
- http://hdl.handle.net/1959.14/101741
- Identifier
- ISSN:0340-5443
- Identifier
- mq-rm-2009010459
- Language
- eng
- Reviewed
