Bearded Tit (Panurus biarmicus) Science Article 4 abstract What do data from birdwatchers notepads tell us? The case of the Bearded Tit (Panurus biarmicus) occurrence in western Poland. Ring 27, 1: 79-85. Birdwatchers gather significant amount of casual observations which are often used in scientific research. However, accuracy of this data is seldom controlled. The […]
Category: Passeriformes
Use of Playback in Estimating Numbers of Bearded Tit Panurus biarmicus Outside the Breeding Season.
Bearded Tit (Panurus biarmicus) Science Article 1 abstract Although the European population of Bearded Tit Panurus biarmicus is largely sedentary, there have been only a few studies of Bearded Tits outside the breeding season. The camouflaging effect of their habitat (reedbeds) and their reduced vocal activity are the main difficulties presented during this time (Wawrzyniak […]
Bay-breasted Warblers Feeding on Fruit: Interspecific Social Facilitation?
Bay-breasted Warbler (Dendroica castanea) Science Article 2 abstract At about 1135 on 4 October 1975 we noticed a Scarlet Tanager (Piranga olwacea) feeding on the fruits of a very large dogwood (Comus florida) about 2 m from the window of our home west of Chapel Hill, North Carolina. Helmut C. Mueller, Bird Banding summer 1976 […]
ENERGY AND WATER BUDGETS OF LARKS IN A LIFE HISTORYPERSPECTIVE: PARENTAL EFFORT VARIES WITH ARIDITY
Bar-tailed Lark (Ammomanes cinctura) Science Article 1 abstract We compared physiological, demographic, and ecological variables of larksto gain insights into life history variation along an aridity gradient, incorporating phylogeneticrelationships in analyses when appropriate. Quantifying field metabolic rate (FMR)and water influx rate (WIR) of parents feeding nestlings as measures of parental effort, wefound that parental FMR […]
OBSERVATIONS ON THE FEEDING HABITS OF SOMEWOODPECKERS AND WOODCREEPERS IN COSTA RICA
Barred Woodcreeper (Dendrocolaptes certhia) Science Article 1 abstract The observations reported here were made while I attended the Tropical Entomology Course offered by the Organization for Tropical Studies in Costa Rica sponsored by the National Science Foundation. In spite of the brevity of the study, I believe that the results are a useful addition to […]
Repeatability of reproductive traits in female Barn Swallows Hirurcdo rustica
Barn Swallow (Hirundo rustica) Science Article 2 abstract The constancy of laying date, clutch size, numbers of hatchlings and fledglings,and mean egg volume per clutch was studied in female Barn SwallowsHirundo rustica in central Poland in 1994-97 . Laying dates of firstclutches, clutch size, the number of hatchlings and fledglings and egg volumeshowed significant repeatability. […]
Bill edge development as a reliable character for discriminating two age classes within juvenile Swallows Hirundo rustica
Barn Swallow (Hirundo rustica) Science Article 3 abstract To compare fitness data not only between adults and juveniles but also between recently-fledged and older juvenile Swallows we looked for an externally-visible character to distinguish these two cohorts in the field. So far, no such criteria seem to have been described (Svensson 1992, Suter 1985, Cramp […]
Influence of parental age on the growth of nestling Swallows Hirundo rustica
Barn Swallow (Hirundo rustica) Science Article 7 abstract The growth (mass) of 67 nestling swallows is studied and factors influencing growth parameters are investigated. The logistic model best fits the data; there is no evidence that clutch-size influences any of the growth parameters. On the other hand, brood effect is highly significant for each of […]
Tail streamers and flight performance in Barn Swallows: natural or sexual selection?
Barn Swallow (Hirundo rustica) Science Article 5 abstract The paper of Evans (1998) published in the journal Nature on the evolution of tail streamers in male Barn Swallows Hirundo rustica is discussed in the light of some methodological problems commited by this author. The conclusions are that the interpretation of Evans’ results must be taken […]
A Barn Swallow Hirundo rustica roost under attack: timing and risks in the presence of African Hobbies Falco cuvieri
Barn Swallow (Hirundo rustica) Science Article 1 abstract A large Barn Swallow Hirundo rustica roost in Pennisetum-covered clearingsamid rainforest in SE Nigeria attracted at least eleven species ofavian predators. Bijlsma R.G. & van den Brink B. 2005, Ardea 93(1): 37-48 Download article download full text (pdf)