Common Buzzard (Buteo buteo) Science Article 3 abstract The complete sequence of the mitochondrial (mt) genome of Buteo buteo was determined. Its gene content and nucleotide composition are typical for avian genomes. Due to expanded noncoding sequences, Buteo possesses the longest mt genome sequenced so far (18,674 bp). The gene order comprising the control region […]
Diet of Common Buzzards (Buteo buteo) in southern Norway determined from prey remains and video recordings.
Common Buzzard (Buteo buteo) Science Article 5 abstract We examined the diet of six breeding Common Buzzard (Buteo buteo) pairs in southern Norway, by analysing pellets and prey remains collected around and in nests, and by video recording prey delivery at the nests. Mammals, birds and reptiles were the major prey groups. Amphibians were underestimated […]
Sexing, ageing and moult of Buzzards Buteo buteo in a southern European area
Common Buzzard (Buteo buteo) Science Article 1 abstract In order to obtain a reliable method for sexing and ageing Buzzards Buteo buteo breeding in southern Europe, 115 birds from a wildlife rehabilitation centre and 43 trapped birds were measured, sexed and aged over four years (2000-2003). Dead birds were sexed by examining their gonads, and […]
Breeding density and brood size of Common Buzzard Buteo buteo in relation to snow cover in spring
Common Buzzard (Buteo buteo) Science Article 4 abstract In a 500 km2 study area situated 100-400 m above sea level in southern Norway, breeding density and offspring production of Common Buzzard Buteo buteo was studied in relation to snow depth in spring during 1985-97. Because a thick snow layer will reduce the availability of the […]
Unlikely occurrence of the Andalusian Hemipode Turnix sylvatica in Catalonia (NE Spain) one century ago
Common Buttonquail (Turnix sylvaticus) Science Article 19 abstract Historically, the nominate subspecies of the Andalusian Hemipode was distributed only insouthern Iberia, North Africa and Sicily. However, some authors have mentioned uncertainrecords in Catalonia (NE Spain) during last century. Oscar Gordo, Xavier Ferrer and Abilio Reig-Ferrer, Revista Catalana d’Ornitologia 22:30-34, 2006 Download article download full text […]
The expansion velocity of the Collared Dove Streptopelia decaocto population in europe.
Collared-Dove (Streptopelia decaocto) Science Article 2 abstract Invasion models have been developed and applied for a long time. As presently existing models have serious drawbacks, another, more general mathematical model of range expansion has been developed. Using information on reproduction, survival, and dispersal at the level of the individual, this model allows the calculation of […]
Nonlinear phenomena and song evolution in Streptopelia doves
Collared-Dove (Streptopelia decaocto) Science Article 1 abstract The production of complex bird song is commonly achieved through neuromuscular activity of respiratory,syringeal and craniomandibular systems. According to nonlinear dynamics theory, however, complexity can also emergespontaneously from very simple and deterministic systems, without any external control. Thus far, studies linking bird songcomplexity with nonlinear dynamics are very […]
To trill or not to trill? Territorial response to a heterospecific vocal trait in male collared doves, Streptopelia decaocto
Collared-Dove (Streptopelia decaocto) Science Article 3 abstract Responding of individuals outside the conspecific range has been largely explained by biases in sensory or cognitive systemstoward particular traits or trait values. More recently, it has been shown that such responses might occur if individuals stillrespond to signal traits that have been lost over time. Jean Secondi […]
A NEST OF THE COLLAREDGNATWREN (MICROBATES COLLARIS)
Collared Gnatwren (Microbates collaris) Science Article 1 abstract According to Kiff (Condor 79:261-262, 1977), thenest of the Collared Gnatwren (Microbates collaris,Sylviidae) has not been reported. He found a cupnest near the ground for the Half-collared Gnatwren(M. cinereiuentris). The related Long-billed Gnatwren(Ramphocaenus melanurus) is known to havesuch a nest (bibliography in Kiff 1977); we havefound several […]
Breeding biology and behavior of the Collared forest-falcon (Micrastur semitorquatus) in Guatemala
Collared Forest Falcon (Micrastur semitorquatus) Science Article 1 abstract We studied Collared Forest-Falcons Micrastur semitorquatus in Tikal National Park, Guatemala from 1988 through 1993, documenting 9 nesting attempts. The Collared Forest-Falcon is a year-round resident, nesting in pre-existing cavities in large trees. Breeding commenced during the middle of the dry season. Egg laying occurred early […]