![]() Soler M (1990) Relationships between the great spotted cuckoo Clamator glandarius and its corvid hosts in a recently colonized area. Rydén O, Bengtsson H (1980) Differential begging and locomotory behaviour by early and late hatched nestlings affecting the distribution of food in asynchronously hatched broods of altricial birds. Royama T (1966) Factors governing feeding rate, food requirement and brood size of nestling great tits ( Parus major). ![]() Rothstein SI (1990) A model system for coevolution: avian brood parasitism. Redondo T, Arias de Reyna L (1988) Vocal mimicry of hosts by great spotted cuckoo Clamator glandarius: further evidences. Nestling weight, offspring survival and optimal brood size. Nur N (1984) The consequences of brood size for breeding blue tits. Mundy PJ, Cook AW (1977) Observations on the breeding of the pied crow and great spotted cuckoo in northern Nigeria. Mundy PJ (1973) Vocal mimicry of their hosts by nestlings of the great spotted cuckoo and striped crested cuckoo. The quality of different species as hosts. Mason P (1986) Brood parasitism in a host generalist, the shiny cowbird. Martinez JG, Soler M, Soler JJ, Paracuellos M, Sanchez J (1992) Alimentación de los pollos de urraca ( Pica pica) en relación con la edad y disponibilidad de presas. Löhrl H (1968) Das Nesthäkchen als biologisches Problem. Lockie JD (1955) The breeding and feeding of jakdaws and rooks with notes on carrion crows and other Corvidae. Lack D (1968) Ecological adaptations for breeding in birds. Versl Meded Plantenziekt Wageningen 69:1–145. Kluijver HN (1933) Bijdrage tot de biologic en de ecologic van den spreeuw ( Sturnus vulgaris L.) gedurende zijn voortplantingstijd. Johnson EJ, Best LB, Heagy PA (1980) Food sampling biases associated with the “ligature method”. Hussell DJ (1991) Regulation of food provisioning in broods of altricial birds. Godfray HCJ (1991) Signalling of need by offspring to their parents. Gill BJ (1982) The grey warbler's care of nestlings: a comparison between unparasitized broods and those comprising a shining bronze-cuckoo. Rivista Ital Ornitol 41:86–107.įry CH, Keith S, Urban EK (1988) the birds of Africa, vol III. Proc R See Lond B 205:489–511.ĭi Carlo EA (1971) Appunti sulla biologia del cuculo dal ciuffo ( Clamator glandarius). Anim Behav 36:262–284.ĭawkins R, Krebs JR (1979) Arms races between and within species. ![]() Oxford University Press, Oxford.ĭavies NB, Brooke M de L (1988) Cuckoos versus reed warblers: adaptations and counteradaptations. Condor 90:29–39.Ĭramp S (ed) (1985) The birds of the Western Palearctic. Ibis 131:250–256.īuitron D (1988) Female and male specialization in parental care and its consequences in black-billed magpies. Poyser, London.īrooke M de L, Davies NB (1989) Provisioning of nestling cuckoos Cuculus canorus by reed warbler Acrocephalus scirpaceus hosts. Secondly, when unparasitized nests were experimentally parasitized with a cuckoo chick that had its gape painted to mimic that of magpie chicks, the parasitic cuckoo received less food than the average magpie chick.īengtsson H, Rydén O (1981) Development of parent-young interaction in asynchronously hatched broods of altricial birds. Firstly, when we experimentally introduced one medium-sized (7–9 days) cuckoo chick into an unparasitized magpie nest where the largest magpie chick was 12–15 days old, the cuckoo did not receive significantly more food than the average or the largest magpie chick. Here, we analyze experimentally the effects of two of these stimuli, preferential feeding of large nestlings and of nestlings with conspicuous palatal papillae. This hypothesis predicts that if any stimulus is masked, the efficiency of the cuckoo in eliciting parental care will decrease. Great spotted cuckoo chicks receive most of the food brought to the nest by the foster parents, because they exploit a series of stimuli which jointly (or sometimes individually) operate as a supernormal stimulus. This preferential allocation of food by magpie parents to great spotted cuckoo chicks is consistent with the supernormal stimulus hypothesis, because this result implies that cuckoo chicks provide stronger stimuli for parental care than host chicks. In both naturally and experimentally parasitized nests, great spotted cuckoo chicks were fed at a higher rate than magpie chicks in the same nest. Adult magpies Pica pica provide parasitic great spotted cuckoo Clamator glandarius nestlings with a diet very similar to that fed to their own chicks.
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