Avtor/Urednik		Polak, Slavko
Naslov		Pojavljanje lesne sove Strix aluco v notranjskih in primorskih kraških jamah
Prevedeni naslov		Occurrence of tawny owl Strix aluco in the karst caves of the Notranjska and Primorska regions
Tip		članek
Vir		Acrocephalus
Vol. in št.		Letnik 21, št. 98-99
Leto izdaje		2000
Obseg		str. 55-9
Jezik		slo
Abstrakt		For his present contribution, the author gathered all the available data of the occurrence of Tawny Owl Strix aluco and its pellets in 15 karst caves of the Notranjska and Primorska regions. The owls were observed in accessible horizontal caves and particularly in vertical pitches hard of access, i.e. at their entrances as well as in their inner parts. The greatest depth at which the owls' traces were found reached 100 m in the Brimšca cave near Kozina, where a nest with eggs was found at the bottom of the entrance pitch. The eggshells and bones of the young found in the caves of Jama v Suhi rebri and Križna jama are also a proof that Tawny Owls occasionally breed in these caves. One of the causes for this phenomenon could very possibly lie, according ro the author, in the lack of tree holes and other suitable nest-sites on the surface. The author also states that the owls are a kind of a food vector for the troglobiontic animals in their poor underground environment. In general, the speleological literature does not include owls, and on the basis of his findings the author believes that the Tawny Owl could easily be considered a trogloxene animal, i.e. a periodical visitor of the karst underground.
Izvleček		Avtor je v članku zbral podatke o pojavljanju lesne sove Strix aluco in njenih izbljuvkov v 15 notranjskih in primorskih kraških jamah. Sove so bile opazovane v dostopnejših vodoravnih jamah ter predvsem v težko dostopnih navpičnih breznih, tako na vhodu kot tudi v temnih notranjih delih jam. Najgloblje so bile sledi lesnih sov najdene 100 metrov globoko v jami Brimšca pri Kozini. Na dnu vhodnega brezna jame Brimšce je bilo najdeno gnezdo z jajci. Tudi najdene jajčne lupine in kosti mladičev v Jami v Suhi rebri in Križni jami dokazujejo, da lesne sove v jamah občasno gnezdijo. Kot enega možnih vzrokov za to avtor navaja pomanjkanje drevesnih dupel oziroma drugih primernih površinskih gnezdišč. Avtor v prispevku ugotavlja, da so sove tudi vektor hrane troglobiontskim jamskim živalim v revno podzemsko okolje. Speleobiološka literatura sov običajno ne vključuje. Na osnovi ugotovitev avtor meni, da lahko lesno sovo uvrstimo med trogloksene jamske živali, torej občasne obiskovalce kraškega podzemlja.
Deskriptorji		BIRDS ECOSYSTEM