Muscovy Duck (Cairina moschata) Science Article 1 abstract Presented here are the feeding habits, attack behavior, daily and annual activity of adult of Phorcotabanuscinereus (Wiedeman, 1821), Chrysops laetus (Fabricius, 1805) and Phaeotabanus cajennensis (Fabricius, 1787), whilebiting a domestic duck, Cairina moschata (Linnaeus, 1758). The last two species were recorded for the first timeattacking birds. This […]
NOTES ON THE LIFE HISTORY OF THEMOUSE-COLORED FLYCATCHERIN SURINAM
Mouse-coloured Tyrannulet (Phaeomyias murina) Science Article 1 abstract The Mouse-colored Flycatcher (Phaeomyios murinu) is one of the many small and dull-colored flycatchers in tropical South America. For a description of the bird, its habitat, food, nest, and eggs, I refer the reader to my recently published ‘Birds of Surinam’ (Oliver and Bovd. Edinburgh. 1968). It […]
Importance of Structural Stability to Success of Mourning Dove Nests
Mourning Dove (Zenaida macroura) Science Article 1 abstract Studies of nest-sites election and nesting habitats often involve a ‘characterization’ of nests and of habitats in which nests are found. Our objective in the present work is to identify nest-site characteristics that are associated with variation in components of Mourning Dove (Zenaida macroura) fitness( e.g. the […]
Radio-instrumented Mourning Dove Preyed Upon by Gray Rat Snake
Mourning Dove (Zenaida macroura) Science Article 2 abstract Several authors (George 1951, Balda 1965, Lesser 1966) have published accounts of avian predation on fledged Mourning Doves (Zenaida macroura). Additionally, Blair (1967) reported an unsuccessful attempt by a bullfrog (Rana catesbeianat)o capture a Mourning Dove in flight. To our knowledge, however, no report of reptilian predation […]
MULTIPLE BROODING AS A REPRODUCTIVE STRATEGY: TIME-CONSERVING ADAPTATIONS IN MOURNING DOVES
Mourning Dove (Zenaida macroura) Science Article 3 abstract The Mourning Dove (Zenaidam acroura) has a suite of adaptations that promotes multiple brooding, a common characteristic among columbids. Mourning Doves are well adapted for multiple brooding because they produce food (crop milk) for young nestlings in vivo and feed older nestlings a diverse granivorous diet. This […]
Veranderungen in der Zusammensetzung der PCB- und DDT-Gemische in verschiedenen Lebensstadien der Wiesenweihe (Circus pygargus) und der Rohrweihe (Circus aeruginosus) in Nordrhein-Westfalen, Deutschland
Montagus Harrier (Circus pygargus) Science Article 3 abstract Egg and liver samples of Montagu’s and Marsh Harriers from the 1990’s were examined for their burden of DDT and PCB. The DDT burden in both species was distinctly higher in the eggs than in juveniles and adults, whereby the values for the adults were clearly higher […]
Age-related differences in foraging behaviorof Montagus harrier Circus pygargus males in south-east Poland
Montagus Harrier (Circus pygargus) Science Article 2 abstract The hunting behaviour and habitat use of second-calendar-year males (subadult) and grey (adult) males of Montagu’s harrier Circus pygargus were compared in south-east Poland. Subadult males performed cruising flights less frequently than did adult males. In contrast, subadult males more frequently soared thermals and were harassed more […]
Satellite tracking of two Montagu’s Harriers ( Circus pygargus ): dual pathways during autumn migration
Montagus Harrier (Circus pygargus) Science Article 4 abstract Autumn migration routes of two Dutch female Montagu’s Harriers (Circus pygargus) were documented for the first time using satellite telemetry. Both migrated to their African wintering area
Food-niche differentiation in sympatric Hen Circus cyaneus and Montagu’s Harriers Circus pygargus
Montagus Harrier (Circus pygargus) Science Article 5 abstract Hen Harriers Circus cyaneus and Montagu’s Harriers Circus pygargus are medium-sized raptors that differ in size (Hen Harrier being slightly bigger than Montagu’s Harrier) and breeding system (Montagu’s Harriers are semi-colonial and Hen Harriers defend nesting-hunting territories). In contrast, the diets of the two species when in […]
The diet of Montagu’s Harriers Circus pygargus in relation to land-use systems in pseudosteppe areas of Extremadura (SW Iberian Peninsula)
Montagus Harrier (Circus pygargus) Science Article 6 abstract The feeding of Montagu’s Harriers Circus pygargus during the breeding period was studied in relation to the land-use systems (agricultural or pasture-lands) in pseudosteppe areas of Extremadura (SW Spain). A total of 1,180 prey items was identified from the combined analysis of pellets and prey remains collected […]