Search results for "Falcon"
showing 10 items of 73 documents
Helminth communities of owls (strigiformes) indicate strong biological and ecological differences from birds of prey (accipitriformes and falconiform…
2012
We compared the helminth communities of 5 owl species from Calabria (Italy) and evaluated the effect of phylogenetic and ecological factors on community structure. Two host taxonomic scales were considered, i.e., owl species, and owls vs. birds of prey. The latter scale was dealt with by comparing the data here obtained with that of birds of prey from the same locality and with those published previously on owls and birds of prey from Galicia (Spain). A total of 19 helminth taxa were found in owls from Calabria. Statistical comparison showed only marginal differences between scops owls (Otus scops) and little owls (Athene noctua) and tawny owls (Strix aluco). It would indicate that all owl …
Delayed maturation in plumage colour: Evidence for the female-mimicry hypothesis in the kestrel
1993
In many sexually dichromatic species, young males have female-like plumage during their first potential breeding year. The female-mimicry hypothesis (FMH) supposes that by possessing female-like plumage young males deceive older conspicuous males into believing that they are females, thus reducing competition from adult males. The status-signalling hypothesis (SSH) supposes that adult males can distinguish sex, but postulates that young males reduce competition from adult males by reliably signaling low status with their dull plumage. We tested these hypotheses in the European kestrel (Falco tinnunculus). Female-like young males settled to breed closer to adult males than did other adult ma…
The diet of Saker Falcon Falco cherrug overwintering in the Mediterranean (Sicily)
2014
The winter diet of Saker Falcon Falco cherrug in the Mediterranean basin is unknown. Thanks to satellite tracking of two individuals from Hungary to Sicily, during winters 2012-13 and 2013-14 we identified the roost and collected 40 pellets. Pellet analysis allowed identification of 124 prey belonging to 29 taxa. Saker Falcons during winter shift their alimentation to insects and birds, with respect to mammals in the breeding season, plundering from small beetles to rabbits. Insects, especially Orthoptera and Coleoptera, were the most frequent prey in both years, totalling the 66.9% of remains. Among vertebrates the Saker Falcons preyed upon birds (21.77%), mammals (5.65%) and reptiles (4.8…
Climate Effects on Breeding Phenology of Peregrine and Lanner Falcons in the Mediterranean
2022
We explored the effects of weather on the timing and reproduction of the Mediterranean Peregrine Falcon Falco peregrinus brookei and the Lanner Falcon F. biarmicus feldeggii living on the Mediterranean island of Sicily. We found that the start date of incubation has changed during 1979–2019 and analysed whether incubation timing affected the productivity of both populations and whether the change of incubation date and the quality of breeding sites depended on climatic conditions. Overall spring temperature and rainfall increased on Sicily and the incubation date of the Peregrine and the Lanner Falcon has shifted to be about one week later over the time period 1979 to 2019. Linear mixed mod…
A comparison of peregrine Falco peregrinus and lanner Falco biarmicus trophic niche in Sicily
2017
Prey availability is a crucial factor for the reproductive success of apex predators and the analysis of their diets can provide meaningful information about the quality of their habitats. In Sicily the declining lanner falcon Falco biarmicus feldeggii and the increasing peregrine falcon Falco peregrines brookei share similar habitats and trophic needs. By studying their current and past diets, we have investigated whether the characteristics of their foraging ecology could explain these different demographic trends. In 2014-2016, we identified 805 peregrine and 250 lanner Vertebrate prey from 15 peregrine and 6 lanner nests, and compared our dataset with previous data from Sicily (Peregrin…
Breeding abundance of threatened raptors as estimated from occurrence data
2008
A model derived from the negative binomial distribution (NBD) has been proposed to solve the problem of predicting abundance of species from occurrence maps. The viability of NBD was explored for predicting the breeding abundance of five threatened species of raptor: Bonelli's Eagle Hieraaetus fasciatus, Golden Eagle Aquila chrysaetos, Peregrine Falco peregrinus, Lanner Falco biarmicus and Lesser Kestrel Falco naumanni. First, the accuracy of the NBD was tested in a reference area where the species abundance and occurrence were known through intensive field surveys. Next, an estimation of regional abundance derived from NBD was made for each species. These estimates were then compared to th…
Attraversamento trasversale Torre dell’Orsa - Aeroporto - Statale - Cinisi
2014
Lʼarea a sud-est dellʼaeroporto di Palermo è in rapida trasformazione: le espansioni edilizie di Cinisi e Villagrazia di Carini si sono saldate in una “campagna urbanizzata” continua, nel 2001 è stato inaugurato il tratto di metropolitana di Palermo che da Piraineto giunge a Punta Raisi con fermata intermedia “Tonnara Orsa”, la Società di gestione dellʼaeroporto Falcone-Borsellino (Gesap) ha previsto la realizzazione di un nuovo ingresso a sud dellʼaeroporto in corrispondenza del fuso racchiuso fra lʼautostrada A29 e la linea ferroviaria, a sud-ovest dello svincolo autostradale di Villagrazia di Carini, in località Bosco Tagliato, sorgerà un centro commerciale. I cambiamenti in atto e le ce…
Lo spessore del confine, tra aeroporto e ferrovia. Progetto per l’aeroporto Falcone-Borsellino di Palermo
2007
Progetto di riqualificazione per una vasta area a confine con l'aeroporto Falcone e Borsellino di Palermo redatto in occasione del Seminario di progettazione e workshop "Aeroporto e dintorni", Infrastrutture, paesaggi, architetture, svoltosi a Cinisi (PA) tra febbraio e giugno 2004.
Il ruolo dei collaboratori di giustizia previsti dal c.d. modello Falcone
2022
Il contributo si incentra sulla figura del “collaboratore di giustizia" in relazione all'accertamento dei fenomeni mafiosi. In un primo momento, l'analisi si basa sulle attività investigative svolte negli anni ’80, che costituiscono un riferimento essenziale per le successive scelte normative e giurisprudenziali. In seguito, nel considerare il panorama più recente, vengono esaminati in particolare tre profili inerenti rispettivamente al "verbale illustrativo" che raccoglie il racconto dei collaboratori, alla valutazione delle loro dichiarazioni e all'eccezionale ipotesi di revisione del giudicato prevista per il caso in cui esse risultino false. The paper focuses on the role of "collaborato…
Napoli, ordine e disordine. Fotografie di Giovanni Battista Maria Falcone
2009
Il saggio correda il reportage fotografico condotto su Napoli, che costituisce il fulcro centrale del volume, soffermandosi sul sapiente linguaggio fotografico utilizzato nel contesto urbano partenopeo.