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The Black Stork Ciconia nigra, following an expansion on European scale, started breeding in Italy in 1994 with one pair in the Piedmont Region and one in the Calabria Region. Since then, the breeding pairs established in Italy have progressively increased up to 18 in 2016, and they are currently in Piedmont, Lazio, Campania, Molise, Apulia, Basilicata and Calabria. However, the number of breeding pairs could be higher than 20, as indicated by records and observations of adults and juveniles, during the breeding period in potentially suitable nesting areas. Despite the low population density in Italy, the trend in the breeding population in Northwest and in Southern Central regions seems to show a slight and high increase respectively. Productivity, breeding success and fledging rate have been considered and analysed. A difference between the two macro areas has been found in the choice of nesting sites, which is on trees for Northwest couples, and cliffs for Southern Central couples. It is necessary to further explore the reason why the small Northwest population does not show any increase and range expansion compared to the Southern Central one.

Riassunto -Il presente lavoro aggiorna la lista degli uccelli segnalati nel Lazio a tutto il 2009. La check-list comprende tutte le specie inserite nelle categorie AERC. Sono riportate 397 specie incluse nelle Liste A, B e C, 16 nella Lista D e 70 nella Lista E. Le specie accidentali sono 82, di cui 14 non più segnalate dal 1950. Per ogni specie viene indicata la fenologia regionale sia secondo i codici AERC, sia secondo la terminologia precedentemente in uso.Parole chiave -check-list, uccelli, Lazio.