Individual recognition of male Tawny owls (<i>Strix aluco</i>) using spectrograms of their territorial calls

Galeotti, Paolo; Pavan, Gianni

doi:10.1080/08927014.1991.9525378

Cited by 101 publications

(76 citation statements)

References 25 publications

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“…During these daylight visits, adults were often detected thanks to alerting passerines. We determined sex either visually based on sexual size dimorphism (Baudvin and Dessolin 1992) or the type of alarm calls (Galeotti and Pavan 1991). When we did see an adult that was sitting still in a tree (or when we did not see it at all and did not hear any passerines alerting), we considered them as not adopting any anti-predator behaviour.…”

Section: Nest Defence During Daylight Hours In Relation To Adult Colomentioning

confidence: 99%

Melanin-based colour polymorphism signals aggressive personality in nest and territory defence in the tawny owl (Strix aluco)

Silva

Brink

Emaresi

et al. 2013

Behav Ecol Sociobiol

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Nest and territory defence are risky and potentially dangerous behaviours. If the resolution of life history trade-offs differs between individuals, the level of defence may also vary among individuals. Because melanin-based colour traits can be associated with life history strategies, differently coloured individuals may display different nest and territory defence strategies. We investigated this issue in the colour polymorphic tawny owl (Strix aluco) for which plumage varies from dark to light reddish melanic. Accordingly, we found that (1) our presence induced a greater response (flying around) from dark-coloured than light-coloured females and (2) dark reddish males suffered lower nest predation rates than light-coloured males. In experimentally enlarged broods, the probability that females reacted after we played back the hoot calls of a stranger male was higher if these females were lighter reddish; the opposite pattern was found in experimentally reduced broods with dark parents being more reactive than light parents. Finally, darker females alarmed more frequently when paired with a light than with a dark male, suggesting that partners adjust their behaviour to each other. We also tested whether colouration is used as a signal by conspecifics to adjust the level of their defensive behaviour. Accordingly, breeding females responded more vigorously to a dark than a light reddish stuffed tawny owl placed beside their nest. We conclude that melaninbased colouration is a signal of alternative nest and territory defence behaviour that depends on ecological factors.

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Section: Nest Defence During Daylight Hours In Relation To Adult Colomentioning

confidence: 99%

Melanin-based colour polymorphism signals aggressive personality in nest and territory defence in the tawny owl (Strix aluco)

Silva

Brink

Emaresi

et al. 2013

Behav Ecol Sociobiol

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show abstract

“…Since individuals differ in vocal apparatus and experience, we would expect some tendency toward individual variation in most signals, indeed individual variation may be inevitable (Falls 1982 Columbia livia and owls (Abs & Jeismann 1988, Cavanagh & Ritchison 1987, Galeotti & Pavan 1991, Lengagne 2001. We found that calls of both the Guillemot and King Penguin can encode individual information.…”

Section: Presence Of Individual Signatures In the Callmentioning

confidence: 71%

Finding your mate in a seabird colony: contrasting strategies of the Guillemot Uria aalge and King Penguin Aptenodytes patagonicus

Lengagne¹,

Harris²,

Wanless³

et al. 2004

Bird Study

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“…i n a number of territories The overlap in Lanyu Scops On1 territories is most likely a I esult of high competition pressure for nest sites, rather than of food supplq as i n the Dunnock Pziizella fnodtiliiny (Davies & Hartlei 1996) This is because in populations where members arc food-limited, floaters probablt c annot forage regularl) in territories (Smith 1978 Monkeys Alouatta palliata used dawn calls as a spacing mechanism in the overlapping part of their home ranges. Although Sekulic (1982) (Galeotti & Pavan 1991. The calls of Great-horned Owls (Rohner 1997) have individually identifiable characteristics.…”

Section: Discussionmentioning

confidence: 99%

Territoriality and the significance of calling in the Lanyu Scops Owl Otus elegans botelensis

Severinghaus

2000

Ibis

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Territories of Lanyu Scops OwlsOtus elegans botelensis overlap in both breeding and non-breeding seasons. Results of radiotelemetry showed that neighbouring owls do not use the shared areas of their territories at the same time. Frequent countersinging apparently permitted individuals to avoid potentially costly encounters with neighbours. Nonterritorial owls can forage and rest in occupied territories. Experiments using decoys and playbacks showed that intruding owls were tolerated within either core or peripheral territories in all seasons if they remained silent, while calling intruders almost always incited threats or attacks even in autumn. Tolerating silent owls that are not competitors for mates or for nest sites appears to be an energy-saving territorial strategy.

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Individual recognition of male Tawny owls (Strix aluco) using spectrograms of their territorial calls

Cited by 101 publications

References 25 publications

Melanin-based colour polymorphism signals aggressive personality in nest and territory defence in the tawny owl (Strix aluco)

Melanin-based colour polymorphism signals aggressive personality in nest and territory defence in the tawny owl (Strix aluco)

Finding your mate in a seabird colony: contrasting strategies of the Guillemot Uria aalge and King Penguin Aptenodytes patagonicus

Territoriality and the significance of calling in the Lanyu Scops Owl Otus elegans botelensis

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