Great Reed-Warbler (Acrocephalus arundinaceus) Science Article 2 abstract The main ecological difference between the Great Reed Warbler (Acrocephalus arundinaceus arundinaceus) and Eastern Great Reed Warbler (Acrocephalus acrocephalus orientalis) lies in the density of breeding population, which in the Eastern subspecies studied in Japan is on average 10 times higher than that of European populations of […]
Antiparasite behaviour in response to experimental brood parasitism in the great reed warbler: a comparison of single and multiple parasitism
Great Reed-Warbler (Acrocephalus arundinaceus) Science Article 1 abstract Rejection of parasitic eggs is one of the most important adaptations of avian hosts against brood parasites. Multiple brood parasitism is relatively rare in hosts of the common cuckoo (Cuculus canorus), but naturally occurs when the rate of parasitism is high. We experimentally parasitised great reed warbler […]
Habitat selection of two Acrocephalus warblers breeding in reed beds near Malacky (Western Slovakia).
Great Reed-Warbler (Acrocephalus arundinaceus) Science Article 3 abstract The study was carried out in 1999 and 2000 at three sites near Malacky, WSlovakia: Jakubovske rybniky ?shponds, Jakubovske
Reed die-back, water level management and the decline of the Great Reed Warbler Acrocephalus arundinaceus in The Netherlands.
Great Reed-Warbler (Acrocephalus arundinaceus) Science Article 4 abstract Several species of migratory marsh birds have declined in Central and Western Europe. An important question is whether this decline is primarily caused by loss of wetlands on the wintering grounds in Africa or by a decline in habitat quality in the breeding areas. Significant losses of […]
The Great Potoo (Nyctibius grandis) as a probable resident in southern Mexico
Great Potoo (Nyctibius grandis) Science Article 1 abstract In 1987, the Great Potoo, Nyctibius grandis was recorded for the first time in southern Mexico (Rangel-Salazar & Vega-Rivera 1989). At that time, the species was considered to be occasional or acc
Empirical evidence for differential organ reductions during trans-oceanic bird flight
Great Knot (Calidris tenuirostris) Science Article 1 abstract Since the early 1960s it has been held that migrating birds deposit and use only fat as fuel during migratory flight, with the non-fat portion of the body remaining homeostatic. Recent evidence from
INTERSPECIFIC AGGRESSION IN NESTING GREATKISKADEES (PITANGUS SULPHURATUS) IN PARAGUAY
Great Kiskadee (Pitangus sulphuratus) Science Article 3 abstract The Great Kiskadee (Pitangus sulphuratus) is one of the commonest and most conspicuous bird species in Paraguay (del Castillo & Clay 2004, Smith & Clay in press) and is well known for its robust and rowdy nature. During fieldwork at Estancia Laguna Blanca, Departamento de San Pedro, […]
Foraging behavior of tyrant flycatchers (Aves, Tyrannidae) in Brazil
Great Kiskadee (Pitangus sulphuratus) Science Article 1 abstract In this paper we present data on the foraging maneuvers and substrates used to capture preys by 28 species of tyrant flycatchers (Tyrannidae) in Brazil. For six species: Arundinicola leucocephala Linnaeus, 1764, Fluvicola nengeta Linnaeus, 1766, Machetornis rixosa Vieillot, 1819, Myiozetetes similis Spix, 1825, Pitangus sulphuratus Linnaeus, […]
Cavity Nesting by Great Kiskadees (Pitangus sulphuratus):Adaptation or Expression of Ancestral Behavior?
Great Kiskadee (Pitangus sulphuratus) Science Article 2 abstract Beginning with the work of von Ihering (1904), the nature of the nest has been used for formulating systematic hypotheses within the family Tyrannidae. Here, I provide several records of cavity nesting by Great Kiskadees( Pitangus ulphuratusI) .t hen discuss nest location (exposed vs. concealed) and nest […]
Landscape Featur es and Characteristics of Great Gray Owl ( Strix nebulosa) Nests inFragmented Landscapes of Central Alberta
Great Grey Owl (Strix nebulosa) Science Article 1 abstract Forest fragmentation through timber harvesting, agricultural clearing, and other industrial activities is increasing on the Canadian landscape. This study was conducted in order to gain an understanding of habitat requirements for breeding Great Gray Owls (Strix nebulosa) in the forest fragments of central Alberta. D.P. Stepnisky, […]