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 […]
Population crash of the ortolan bunting Emberiza hortulana in agricultural landscapes of southern Finland
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 […]
The feeding from edge towards inner part in soybean plot in rufous turtle dove,Streptopellia orientalis (Latham) and the estimation of passing rate of the flock
Oriental Turtle Dove (Streptopelia orientalis) Science Article 1 abstract Rufous turtle dove,Streptopelia orientalis, coming to the soybean field entered it from the outer part to eat soybean cotyledons. As a result, the injured plants extended from the outer to inner parts in the field. A model expressing these behaviours was constructed here, by assuming that […]
EFFECTS OF HEIGHT OF NEIGHBORING NESTS ON NEST PREDATION IN THE RUFOUS TURTLE-DOVE (STREPTOPELIA ORZENTALIS)
Oriental Turtle Dove (Streptopelia orientalis) Science Article 2 abstract In many bird species, nest predation is one of the most significant causes of breeding failure (Ricklefs 1969). Breeding density is often considered to affect nest predation. Higher breeding density often results in lower predation pressure for species which will mob nest predators (Berg et al. […]
EFFECTS OF HEIGHT OF NEIGHBORING NESTS ON NEST PREDATION IN THE RUFOUS TURTLE-DOVE (STREPTOPELIA ORZENTALIS)
Oriental Turtle Dove (Streptopelia orientalis) Science Article 2 abstract In many bird species, nest predation is one of the most significant causes of breeding failure (Ricklefs 1969). Breeding density is often considered to affect nest predation. Higher breeding density often results in lower predation pressure for species which will mob nest predators (Berg et al. […]
Lek size variation and its consequences in the ochre-bellied flycatcher, Mionectes oleagineus
Ochre-bellied Flycatcher (Mionectes oleagineus) Science Article 1 abstract Several hypotheses suggest that the costs and benefits of display in aggregations of different sizes play a major role in both the evolution of leks and in the distribution of males across lekj of different sizes. We examined the consequences of variation in lek size for both […]
Lek size variation and its consequences in the ochre-bellied flycatcher, Mionectes oleagineus
Ochre-bellied Flycatcher (Mionectes oleagineus) Science Article 1 abstract Several hypotheses suggest that the costs and benefits of display in aggregations of different sizes play a major role in both the evolution of leks and in the distribution of males across lekj of different sizes. We examined the consequences of variation in lek size for both […]
BEHAVIOR AND SOCIAL ORGANIZATION DURING THE BREEDING SEASON IN MIONECTES OLEAGINEUS, A LEKKING FLYCATCHER
Ochre-bellied Flycatcher (Mionectes oleagineus) Science Article 3 abstract The social systems and behavior of Tyrannids are best known for the North American representatives, a small percentage of a large and diverse family. In this paper, we describe the breeding season social organization and behavior of the Ochre-bellied Flycatcher, Mionecteso leagineusa, lek-breeding Neotropical Tyrannid. We describe […]
Evolution of Leks
Ochre-bellied Flycatcher (Mionectes oleagineus) Science Article 2 abstract The most likely reason for males banding in groups known as ‘leks’) for courtship behavior is because it providesan opportunity for females to assess a wide range of males for selection of the best possible traits-and isadvantageous for males because leks increase their chance for encountering females. […]
Stopover behaviour and departure decision of northern wheatears,Oenanthe oenanthe, facing different onward non-stop flight distances
Northern Wheatear (Oenanthe oenanthe) Science Article 1 abstract On the small North Sea island Helgoland (54 deg 11??N, 07 deg 55??E) we studied the stopover ecology of two subspecies of northern wheatear, Oenanthe oenanthe, during spring migration. Birds heading for Scandinavia (O. o. oenanthe) face only short flights across an ecological barrier (50-500 km) whereas […]