Tree Sparrow (Passer montanus) Science Article 4 abstract During the past 30 years, many species of farmland birds have declined dramatically in numbers in Northern Europe, a trend coinciding with a tremendous intensification of agriculture, although the exact causes of these declines remain unclear. One of the worst affected species is the Tree Sparrow (Passer […]
Category: Eurasia
Spring temperatures and laying dates of first eggs of three passerines in Croatia
Tree Sparrow (Passer montanus) Science Article 7 abstract This study is based on the spring temperaturesand laying dates of first eggs of threepasserines (sedentary: Great Tit, Parus majorand Tree Sparrow, Passer montanus; migratory:Starling, Sturnus vulgaris). Laying datesof first eggs were used as estimates of timingof breeding. The term ‘laying date’ is definedas the date of […]
Seasonal variation of the diet of the Stone Curlew Burhinus oedicnemus distinctus at the island of La Palma, Canary Islands.
Thick-knee (Burhinus oedicnemus) Science Article 1 abstract In this study we describe seasonal variation in the diet of the Stone Curlew Burhinus oedicnemus distinctus at La Palma, one of the Western Islands of the Canary Archipelago. The study was conducted through f cal analysis. F ces were collected bimonthly and 266 f ces were examined. […]
Stone-curlews Burhinus oedicnemus and recreational disturbance: developing a management tool for access
Thick-knee (Burhinus oedicnemus) Science Article 2 abstract Stone-curlews Burhinus oedicnemus have a vulnerable population status in the UK after a large population decline and range contraction since the 1930s. Much Stone-curlew breeding habitat is open-access land designated under the Countryside and Rights of Way Act 2000. In order to guide the conservation and habitat management […]
Magnetic cues and time of season affect fueldeposition in migratory thrush nightingales(Luscinia luscinia)
Thrush Nightingale (Luscinia luscinia) Science Article 2 abstract Bird migration requires high energy expenditure, and long-distance migrants accumulate fat for use asfuel during stopovers throughout their journey. Recent studies have shown that long-distance migratorybirds, besides accumulating fat for use as fuel, also show adaptive phenotypic flexibility in several organsduring migration. The migratory routes of many […]
Wingbeat frequency and the body drag anomaly: wind-tunnel observations on a thrush nightingale (Luscinia luscinia) and a teal (Anas crecca)
Thrush Nightingale (Luscinia luscinia) Science Article 1 abstract A teal (Anas crecca) and a thrush nightingale (Luscinia luscinia) were trained to fly in the Lund wind tunnel for periods of up to 3 and 16 h respectively. Both birds flew in steady flapping flight, with such regularity that their wingbeat frequencies could be determined by […]
Influences of restock age and habitat patchiness on Tree Pipits Anthus trivialis breeding in Breckland pine plantations
Tree Pipit (Anthus trivialis) Science Article 1 abstract The British Tree Pipit Anthus trivialis population has shown a marked decline in recent decades, together with a range contraction that has been most apparent in central and southeast England. In East Anglia, the species is now largely restricted to heathland and, in particular, the conifer plantations […]
Migration and morphometrics of Temminck’s StintCalidris temminckii at Ottenby, southern Sweden
Temmincks Stint (Calidris temminckii) Science Article 1 abstract Data are reported from 55 years of ringing and observation on the migration of Temminck’s Stint Calidristemminckii at Ottenby Bird Observatory, Sweden. Numbers ringed have declined since the 1940s due tohigh numbers caught in 1948 and 1949. Thereafter there is no clear trend. The overall autumn migrationdirection […]
Seasonal and interannual variability in laying date, clutch size, egg volume and hatching asynchrony of four lark species in Mediterranean Spain
Thekla Lark (Galerida theklae) 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 […]
Parental body mass changes during the nestingstage in two Lark species in a semi-arid habitat
Thekla Lark (Galerida theklae) 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 […]