Berthelots Pipit (Anthus berthelotii) Science Article 1 abstract On 29th August 2006, we observed several Berthelot’s Pipits Anthus berthelotii feeding along the rocky coast of La Santa, Lanzarote, Canary Islands. One bird captured a smallendemic lizard Gallotia atlantica. Dr J. T. R. Sharrock, British Birds 100, July 2007, 443-445 Download article download full text (pdf)
Territory size in Megaceryle alcyon along a stream habitat
Belted Kingfisher (Ceryle alcyon) Science Article 1 abstract Belted Kingfishers (Megaceryle alcyon) defend both breeding and nonbreeding territories. The small nonbreeding territories serve as feeding territories, and their size is inversely correlated to food abundance. In the breeding season, when nest sites are a limiting resource, territory size does not significantly correlate with food abundance. […]
Behavior and energy budgets of Belted Kingfishers in winter
Belted Kingfisher (Ceryle alcyon) Science Article 2 abstract I recorded behaviors and estimated energy intake and expenditures of 16 Belted Kingfishers (Ceryle alcyon) during January and February 1994. Each bird was watched for an entire day to examine the relationships among temperature, time of day, and foraging behavior. Estimates of total daily energy intake and […]
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 […]
What do data from birdwatchers notepads tell us? the case of the Bearded Tit (Panurus biarmicus) occurrence in Western Poland
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 […]
A survey of the Bearded Tit Panurus biarmicus during the non-breeding season in a landscape of western Poland
Bearded Tit (Panurus biarmicus) Science Article 5 abstract The population of Bearded Tit was studied on a 1872 km2 study area of predominantly agricultural landscape in W Poland, near Poznan. During the non-breeding period (October-March) surveys were made every 10-14 days on a sample of 44 marshlands selected at random out of 240 suitable habitat […]
Individual and temporal variation in cloacal protuberance size of male bearded tits (Panurus biarmicus)
Bearded Tit (Panurus biarmicus) Science Article 2 abstract The intensity of sperm competition is one of the factors known to determine interspecific variation in the size of male reproductive organs. However, individual variation in the size of reproductive organs and its relation to male quality have not been considered appropriately. We investigated the annual pattern […]
Repeatability of egg dimensions within the clutches of Bearded Tit Panurus biarmicus
Bearded Tit (Panurus biarmicus) Science Article 3 abstract The variation in size and shape of Bearded Tit eggs was investigated in the Wielkopolska Region of western Poland in 1988-1992 and 1997-2000. The mean clutch size was 5.47 (95% CL: 5.25-5.70, n = 99), and differed markedly from year to year. Coefficients of variations for the […]
The effect of age and sex on wing morphology and body size of the Bearded Tit Panurus biarmicus in relation to complete moult
Bearded Tit (Panurus biarmicus) Science Article 6 abstract In sedentary birds, variation in wing morphology as a result of complete moult during the transition from juvenile to adult plumage is poorly understood. The aim of this study was to characterise sex- and age-related differences in wing morphology resulting from a complete post-juvenile moult in an […]
NESTING OF THE BAY-BREASTED WARBLER
Bay-breasted Warbler (Dendroica castanea) Science Article 1 abstract IN most of the publications dealing with the avifauna of eastern United States, the Bay-breasted Warbler (Dendroicac astanea) is considered a rare or at least an uncommon bird. Frequenting the coniferous forests of the Canadian Zone, it breeds within this country in only a few of the […]