Tag: all of Emberiza

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. […]

Sexing Corn Buntings Miliaria calandra by discriminant function: a reply

Corn Bunting (Emberiza calandra) Science Article 4 abstract Although, as Morgan (2006) points out, we cannot reject a systematic observer-associated error of 10 mm, we suggest that the existence of some female Corn Buntings (n = 5) with longer wing lengths than described in literature (Cramp & Perrins 1994) and the lack of a normal […]

Sex differentiation of Corn Buntings Miliaria calandra wintering in northern Spain

Corn Bunting (Emberiza calandra) Science Article 1 abstract A discriminant function was developed for sex differentiation of Corn Buntings Miliaria calandra wintering in northern Spain. The function, y = 0.136A + 0.288W-26.837, where A is wing length in mm and W is body weight in g, gives positive values for males and negative values for […]

Sexing Corn Buntings Miliaria calandra by discriminant function: a comment

Corn Bunting (Emberiza calandra) Science Article 3 abstract A recent paper on sexing Corn Buntings Miliaria calandra by discriminant function (Campos et al 2005) quotes wing lengths exceeding 100 mm for five of 51 females sexed by molecular methods. The occurrence of wings this long is noted by the authors as unusual, whereas they are […]

De Grauwe Gors Miliaria calandra: recente aantalsontwikkeling, habitatkeus en perspectieven in relatie tot het beheer van uiterwaarden en akkerland

Corn Bunting (Emberiza calandra) Science Article 2 abstract De Grauwe Gors dreigt uit Nederland te verdwijnen. Ook in de laatste bolwerken in Limburg en de uiterwaarden van de Waal ziet de situatie er voor deze karakteristieke soort niet rooskleurig uit. Een nauwkeurige blik op de lokale aantalontwikkelingen en veranderingen in de beschikbare broed- en winterhabitat […]

Fluctuations related to rainfall in richness and abundance of birds of steppic Mediterranean habitats

Corn Bunting (Emberiza calandra) Science Article 5 abstract The existence of interannual variations in the richness and abundance of bird species breeding in pseudo-steppic Mediterranean areas is analysed and related to the important fluctuations that take place in rainfall, which in turn deeply influence vegetation growth. The hypothesis of food limitation as a key factor […]

Sexual differences in levels of blood carotenoids in Cirl Buntings Emberiza cirlus.

Cirl Bunting (Emberiza cirlus) Science Article 1 abstract Carotenoids are responsible for the bright red and yellow plumage of birds. These substances cannot be synthesised by birds and must be obtained from the diet and transported through the blood to the feathers. The carotenoid content of blood was measured in Cirl Buntings Emberiza cirlus, a […]