Siberian Jay (Perisoreus infaustus) Science Article 1 abstract The evolutionary payoff accruing to parents from breeding offspring could be an incentive for prolonged investments in the offspring. Enhanced survival for offspring as a result of such a prolonged parental investment would increase the value of remaining in the natal territory for the offspring. Here we […]
Category: Passeriformes
Behaviour and life-history responses to chick provisioning under risk of nest predation.
Siberian Jay (Perisoreus infaustus) Science Article 2 abstract This thesis examines risk management in breeding Siberian jays (Perisoreusinfaustus), which is indigenous to the northern taiga. Parent behaviour and the nestare cryptic. A new nest is built each year. It is placed on spruce or pine branches closeto the trunk and well insulated with lichens, feathers […]
Parasitism by Shiny Cowbirds of Rufous-Bellied Thrushes
Shiny Cowbird (Molothrus bonariensis) Science Article 1 abstract I studied the interaction between a brood parasite, the Shiny Cowbird (Molothrusbonariensis), and a large host, the Rufous-bellied Thrush (Turdus rujventris), in the Pampas Region of Argentina. Shiny Cowbird eggs were observed in 34 out of 70 (48.6%) thrush nests throughout the host’s breeding season. The main […]
Feeding associations between capybaras Hydrochoerus hydrochaeris (Linnaeus) (Mammalia, Hydrochaeridae) and birds in the Lami Biological Reserve, Porto Alegre, Rio Grande do Sul, Brazil.
Shiny Cowbird (Molothrus bonariensis) Science Article 7 abstract Feeding associations between capybaras Hydrochoerus hydrochaeris (Linnaeus, 1766) and some bird species were registered in the Lami Biological Reserve, southern Brazil, through observations in a set of transects established in the five major vegetation types of the study area: shrubby and herbaceous swamps, wet grasslands, sandy grasslands […]
Conirostrum bicolor Parasitized by Molothrus bonariensis in Surinam
Shiny Cowbird (Molothrus bonariensis) Science Article 3 abstract Hellmayr (Field Mus. Nat. Hist. Publ. 347, Zoo1. Set. vol 13, 1935, p. 319) includes Surinam in the range of Conirostrum bicolor on evidence of the Penard brothers (Vogels van Guyana, 2, 1910, p. 475), though he mentions no specimens nor localities. In Surinam, as elsewhere in […]
Phylogenetic analysis of life-history adaptationsin parasitic cowbirds
Shiny Cowbird (Molothrus bonariensis) Science Article 2 abstract Parasitic cowbirds lay eggs in the nests of other species and dupe them into caring for their young. Unlike other brood parasites,cowbirds have not developed egg mimicry or bizarre chick morphology. However, most of them parasitize a large number ofhosts. Several features of cowbirds have been proposed […]
Parental body mass changes during the nestingstage in two Lark species in a semi-arid habitat
Short-toed Lark (Calandrella brachydactyla) Science Article 1 abstract Parental body mass changes during the nesting period were analysed for Thekla Larks,Galerida theklae, and Lesser Short-toed Larks, Calandrella rufescens. Body mass of femaleThekla Larks declines from the start of incubation until the chicks fledge; laying date,interpreted as the number of renesting attempts, also has a negative […]
Seasonal and interannual variability in laying date, clutch size, egg volume and hatching asynchrony of four lark species in Mediterranean Spain
Short-toed Lark (Calandrella brachydactyla) Science Article 2 abstract To describe the variation in laying date, clutch size, egg volume and hatching asynchrony of four lark species (Skylark Alauda arvensis, Short-toed Lark Calandrella brachydactyla, Thekla Lark Galerida theklae and Lesser Short-toed Lark Calandrella rufescens) and at two different time scales: between years (large-scale variation), and within […]
Nest and nest-site reuse within and between breedingseasons by three neotropical flycatchers (Tyrannidae)
Sepia-capped Flycatcher (Leptopogon amaurocephalus) Science Article 1 abstract Nest and/or nest site reuse within and between breeding seasons was reported by the Euler’s Flycatcher (Lathrotriccus euleri), the Sepia-capped Flycatcher (Leptopogon amaurocephalus) and the Gray-hooded Flycatcher (Mionectes rufiventris)in forest fragments from southeastern Brazil. Nest and/or nest site reuse between some years was frequent within a single […]
Prevalence of louse-flies Diptera, Hippoboscidae parasitizing a cardueline finch and its effect on body condition.
Serin (Serinus serinus) Science Article 1 abstract Prevalence of louse-flies Diptera, Hippoboscidae parasitizing a cardueline finch and its effect on body condition. Senar J.C., Copete J.L., Domenech J. & Von Walter G., ARDEA 82 (1): 157-160. Download article download full text (pdf)