Ortolan Bunting (Emberiza hortulana) Science Article 1 abstract The ortolan bunting Emberiza hortulana is a bird species that has shown a particularly dramatic decline during recent decades within the agricultural areas of Europe. We studied the population density changes and environment associations of the ortolan bunting within agricultural landscapes in southern Finland, from territory to […]
Category: Passeriformes
Ovenbird response to seismic lines
Ovenbird (Seiurus aurocapilla) Science Article 9 abstract Rapid development of energy reserves in the boreal forest of western Canada hasraised concerns about the potential impacts of forest fragmentation caused by seismic lines. Seismic lines are narrow linear corridors cut by the energy sector to access remote areas. Traditionally, seismic lines were cut using a bulldozer […]
Recognition of individuals of Ortolan Bunting Emberiza hortulana using image processing procedures
Ortolan Bunting (Emberiza hortulana) Science Article 3 abstract The method of individual recognition of Ortolan bunting Emberiza hortulana songs using simpleimage processing procedures was developed and tested. The method efficiency for the training data set was95% and for independent, testing data set 67%. Besides recognition of individuals, the method enablesselection of song elements, which can […]
Recognition of individuals of Ortolan Bunting Emberiza hortulana using image processing procedures
Ortolan Bunting (Emberiza hortulana) Science Article 3 abstract The method of individual recognition of Ortolan bunting Emberiza hortulana songs using simpleimage processing procedures was developed and tested. The method efficiency for the training data set was95% and for independent, testing data set 67%. Besides recognition of individuals, the method enablesselection of song elements, which can […]
Structure and repertoire variation in ortolan bunting (Emberiza hortulana L.) from isolated Norwegian population
Ortolan Bunting (Emberiza hortulana) Science Article 2 abstract This paper describes song structure and repertoire variation in ortolan buntings (Emberiza hortulana) from an isolated and declining Norwegian population, analysed by using the minimal unit of production approach. Males from the studied population sang strophes similar to both dialects found in geographically closest populations in Sweden. […]
Structure and repertoire variation in ortolan bunting (Emberiza hortulana L.) from isolated Norwegian population
Ortolan Bunting (Emberiza hortulana) Science Article 2 abstract This paper describes song structure and repertoire variation in ortolan buntings (Emberiza hortulana) from an isolated and declining Norwegian population, analysed by using the minimal unit of production approach. Males from the studied population sang strophes similar to both dialects found in geographically closest populations in Sweden. […]
Foraging Ovenbird Follows Armadillo
Ovenbird (Seiurus aurocapilla) Science Article 5 abstract Report an observation of a foraging Ovenbird (Seiurus uurocapiZZus) following a ninebandedarmadillo (Dasypus novemcinctus), near Gainesville, Florida. Close attendance only while the armadillo was moving and disturbing leaf litter suggests the Ovenbird was taking advantage of increased prey availability caused by the armadillo’s flushing of insects Douglas J. […]
Daily stopovers as optimal migration strategy in a long-distance migrating passerine: the Northern Wheatear Oenanthe oenanthe.
Northern Wheatear (Oenanthe oenanthe) Science Article 3 abstract Selection for early arrival is expected to shape optimal stopover decisions in migrating birds to minimise time spent on migration. Optimality models predict that fuel loads at departure from stopover sites and stopover duration should depend strongly on search and settling costs as well as on individual […]
Daily stopovers as optimal migration strategy in a long-distance migrating passerine: the Northern Wheatear Oenanthe oenanthe.
Northern Wheatear (Oenanthe oenanthe) Science Article 3 abstract Selection for early arrival is expected to shape optimal stopover decisions in migrating birds to minimise time spent on migration. Optimality models predict that fuel loads at departure from stopover sites and stopover duration should depend strongly on search and settling costs as well as on individual […]
Optimal bird migration and predation risk: a field experiment with northern wheatears Oenanthe oenanthe
Northern Wheatear (Oenanthe oenanthe) Science Article 4 abstract Experiments testing predictions of optimal migration theory so far have concentrated on time and energy as the expenses that birds strive to minimize during migration. Taking advantage of the high variation in numbers of migrating raptors over the island of Helgoland, a field experiment with northern wheatears […]