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 […]
Category: Passeriformes
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 […]
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 […]
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 […]
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 […]
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. […]
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 […]
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 […]