Waterbirds and raptors occurring in the area of Medvedce reservoir (Dravsko polje, NE Slovenia) during the 2002-2008 period

Census of migrating raptors at Breginjski Stol (NW Slovenia) - the first confirmed bottleneck site in Slovenia From 4 to 31 May 2010, raptor migration was monitored daily between 9.00 and 17.00 hrs CET at Breginjski Stol (NW Slovenia). In all, 2,385 raptor passes were counted, belonging to at least 17 species that were divided into resident and migratory birds. Residents (n = 875 passes) foraged, bred or daily migrated over the area. Among them, Griffon Vulture Gyps fulvus was the most frequent species (n = 575 passes) with the largest observed group of 35 individuals on 26 May. In the morning, Griffon Vultures were flying from west to east in search of food, whereas in the afternoon they were returning in the opposite direction to their colony in Forgaria nel Friuli (Italy). Their numbers increased after 15 May, when Croatian Griffons joined those from Italy. Altogether, 1,510 individuals of migratory raptors were counted, belonging to at least nine species. Among them, Honey Buzzard Pernis apivorus was the most common (1,368 ind., 90.6% of migratory raptors). The migration peak was reached on 14 May, with 552 individuals. Most raptors were seen migrating solitarily or in small flocks (2-4 ind.), whereas on five days (4, 7, 11, 13, 14 May) over 20% of all observed flocks were either medium-sized (5-15 ind.) or large (> 15 ind.). Raptors mostly migrated between 9.00 and 13.00 hrs. Taking into consideration several factors - short observation period and limited number of observation hours per day, overlooked raptors due to human- and topography-related causes, movements of observers between observation points, extremely bad weather and night migration of raptors - we estimate that the actual number of migratory raptors that passed Breginjski Stol in spring 2010 was 3,060-4,660 individuals. Thus, Breginjski Stol is the first confirmed bottleneck site of European importance for migratory raptors in Slovenia, as defined by BirdLife International IBA criterion B1iv, and a natural continuation of migratory pathways from northern Italy.

Section: Bottleneck For Migratory Raptorsmentioning

confidence: 99%

Census of migrating raptors at Breginjski Stol (NW Slovenia) - the first confirmed bottleneck site in Slovenia

Denac¹

2010

“…Breeding has been confirmed for 27 of them (five species became recently extinct or breed irregularly or in very low numbers), at least 22 species are regular migrants, and at least five species form regular wintering populations (Sovinc 1994, Geister 1995, Bordjan & Božič 2009, Hanžel & Šere 2011 (Table 1). From further analysis, 11 vagrant species have been excluded.…”

Section: Resultsmentioning

confidence: 99%

“…Migration of raptors, mostly birds of prey, is (Bordjan & Božič 2009, Škornik 2009, Bordjan 2012. For the White-tailed Eagle Haliaeetus albicilla, the usefulness of large scale and non-targeted data from International Waterbird Census (IWC) counts has been shown.…”

Section: Monitoring Methodology Key Species and Key Monitoring Issuesmentioning

confidence: 99%

A preliminary overview of raptor monitoring in Slovenia – an overview of methodologies, current monitoring status and future perspectives

Vrezec

2012

Among 48 raptor species (birds of prey, owls, shrikes) recorded recently in Slovenia, some long-term monitoring activities are being conducted for more than half of them, mainly for conservation and research purposes. However, national coverage is achieved only in 15% of the species, whereas other monitoring programmes are more or less local. Two monitoring approaches are considered, the species specific approach and assemblage approach. Current ongoing monitoring programmes for raptors in Slovenia lack monitoring of breeding success, which is now confined to only a few owl species. Use of nestboxes should therefore be considered more broadly in the future for some species at least.

“…2007, prep. Al Vrezec (Slika 10) Belolična čigra se v Sloveniji redno pojavlja na selitvi, čeprav nikjer ni zelo številna (Bordjan & Božič 2009, Bordjan 2012, Škornik 2012. V zbirki PMS je shranjen le en primerek odrasle ptice, ki je drugače ni bila dokazana (Vrezec 2019).…”

Section: Chlidonias Hybrida Hybrida (Pallas 1811)unclassified

“…V zbirki PMS je shranjen le en primerek odrasle ptice, ki je drugače ni bila dokazana (Vrezec 2019). Vrsta se pri nas sicer redno pojavlja na selitvi (Bordjan & Božič 2009, Bordjan 2012, Škornik 2012. Večina primerkov v zbirki PMS je bila zbrana med letoma 1949 in 1965, večino pa je zbral muzejski preparator Alojz Šmuc.…”

Section: Chlidonias Hybrida Hybrida (Pallas 1811)unclassified

Terns (Sterninae) in the collection of the Slovenian Museum of Natural History

Vrezec

Kačar

2019

The catalogue presents the data on all specimens of terns (Sterninae) that have been inventoried into the ornithological collection of the Slovenian Museum of Natural History (PMS). The catalogue includes data on preserved as well as lost specimens. The data have been collected from all inventory books at hand in the Slovenian Museum of Natural History. By the end of 2019, 66 different specimens of eight tern species have been recorded in the ornithological collection, of which 56 specimens are still preserved. Most specimens were collected in the 1940–1970 period. The largest number of specimens concerns the Black Tern Chlidonias niger and Common Tern Sterna hirundo. Among the collected terns, the specimens found in Slovenia predominate. Five specimens originate from other countries, specifically Eritrea, Oman, Serbia and Croatia.