Spotted Antpitta (Hylopezus macularius) Science Article 1 abstract The first four specimens of Hylopezus macularius auricularis were collected in northern Bolivia in 1937 by Alfonso M. Olalla, who was leading an expedition undertaken by the RoyalN atural History Museum in Stockholm, Sweden. The taxon first was described asa new species (Gyldenstolpe 1941), but later was […]
Category: Passeriformes
Daylength determines departure date of the Spotted Flycatcher Muscicapa striata from its winter quarters.
Spotted Flycatcher (Muscicapa striata) Science Article 1 abstract The annual arrival and departure dates of the Spotted Flycatcher Muscicapa striata at Bloemfontein in the Orange Free State, South Africa, were noted for a continuous period of 36 years (1950-1986). According to a stepwise regression analysis, daylength is by far the most important environmental factor influencing […]
Breeding success of Spotted Flycatchers Muscicapa striata in southern England – is woodland a good habitat for this species?
Spotted Flycatcher (Muscicapa striata) Science Article 2 abstract The UK population of the Spotted Flycatcher Muscicapa striata has declined markedly in the last 30 years but there have been few recent studies of the species. This study examined the relationship between nest success and the predominant habitat type around Spotted Flycatcher nests in two contrasting […]
Parental Care, Male Desertion, and Reproductive Success in the Spanish Sparrow, Passer hispaniolensis
Spanish Sparrow (Passer hispaniolensis) Science Article 3 abstract Parental care in altricial birds is costly, and mate desertion can occur due to sexual conflict over the level of parental investment in the offspring. This cessation of parental care by 1 parent can affect the success of the current reproduction. In the Spanish Sparrow (Passer hispaniolensis), […]
Variation of nestling diet across the breeding season in Spanish Sparrow Passer hispaniolensis in southern Portugal
Spanish Sparrow (Passer hispaniolensis) Science Article 1 abstract […]. The study was carried out in May and June 2000 in Castro Verde, Southern Portugal (37 deg 41?N, 08 deg 03?W). The Castro Verde region is a cereal crop steppe, alternating with fallow grounds, which are usually grazed by sheep and cattle. The sparrows nest in […]
Spanish Sparrow Passer hispaniolensis breeding success in 2002 in southern Portugal
Spanish Sparrow (Passer hispaniolensis) Science Article 2 abstract […]. During the breeding season of 2002 (from May to June), the breeding biology of the Spanish Sparrow was studied in the region of Castro Verde (37 deg 41?N, 08 deg 03?W, Alentejo, Southern Portugal). The Castro Verde region is a cereal steppe with cereal crops alternating […]
Biometrics of the Southern Grey Shrike Lanius meridionalis in relation to age and sex.
Southern Grey Shrike (Lanius meridionalis) Science Article 1 abstract The biometrics of Southern Grey Shrike Lanius meridionalis and differences from the closely related Great Grey Shrike L. excubitor are poorly characterised. The aim of this study was to describe sex and age variation in external biometric measurements for the nominate Southern Grey Shrike L. m. […]
Diet composition and prey choice of the Southern grey shrike Lanius meridionalis L. in South-eastern Spain: the importance of vertebrates in the diet
Southern Grey Shrike (Lanius meridionalis) Science Article 2 abstract The Southern grey shrike consumes several beetle types, grasshoppers, and, during the breeding period, lizards. Birds and small mammals are captured incidentally. It consistently rejects prey smaller than 10 mm long, and prey are larger during the breeding period and summer. Compared with other populations of […]
Blue eggs do not reduce nest predation in the song thrush,Turdus philomelos
Song Thrush (Turdus philomelos) Science Article 2 abstract Many passerine birds with open cup-shaped nests lay blue or blue-green eggs. In thrushes, blue eggs may be cryptic and provide camouflage by imitating spots of light on green leaves. Alternatively, egg coloration may be selectively neutral because nest predators detect nests and not eggs, or it […]
Demographic mechanisms of the population decline of the song thrush Turdus philomelos in Britain
Song Thrush (Turdus philomelos) Science Article 3 abstract In Britain, the song thrush Turdus philomelos is categorized as a species of high national conservation concern because of a large population decline during the last three decades. We calculated a series of annual national population estimates for woodland and farmland habitats combined for the period 1964-2000. […]