Acrocephalus 22 (106-107): 121 -- 132, 2001 131 Med 15. in 25.8.1997 sem opazoval ptice na otoku Lastovo. Glede na izku{nje iz severnega Jadrana sem se ~udil majhnemu {tevilu rumenonogih galebov Larus cahinnans. V `elji po ~im bolj neposrednem opazovanju sem si vsakega izmed njih tudi dobro ogledal. Kmalu sem ugotovil, da je preliv v Pre`bi nekak{en lijak in v tem ~asu nemara najbolj{a galebja opazovalna to~ka. Dne 21.8.1997 sem ob 15. uri povsem nepri~akovano uzrl odrasel osebek sredozemskega galeba, ki je v nizkem letu pre~kal preliv v Pre`bi v smeri proti Malom jezeru. Glede na to, da je bil na Jadranskem morju sredozemski galeb nedavno odkrit kot gnezdilec [Rubini~, B. & Vrezec, A. (2000): Audouinšs Gull Larus audouinii, a new breeding gull species in the Adriatic Sea (Croatia). Acrocephalus 21 (102-103): 219-222], je mogo~e, da kje v okolici Lastova vrsta tudi gnezdi. Borut [tumberger, SI-2282 Cirkulane 41, Slovenia Little Tern Sterna albifrons & Common Tern S. hirundo Mala ~i­gra & navadna ~i­gra – v okviru ekspedicije po reki Dravi je bilo med Legradom (izliv Mure) in Donavo pre{tetih 50 malih in 80 navadnih ~iger; realna ocena za populacijo malih ~iger na Dravi v letu 2000 je 25 parov, za oceno velikosti gnezde~e populacije navadnih ~iger pa je bil datum {tetja `e prekasen (S Hrva{ka) During July 23rd and 29th 2000, Emil Flaj{man, Nikola Wolf, David Reeder, Jure and Boris Ko~evar and the author of these lines were travelling in boats down the Drava river from Legrad (mouth of the Mura river) to Erdut (Danube). Within the framework of the Mura-Drava- Danube Expedition we covered 254 km in six days. During the voyage we counted Common and Little Terns. The largest colony of Terns was found near the Botovo bridge: at the 226th kilometre of the river, 10 pairs of Little Tern and some 50 individuals of Common Tern were present (altogether we counted about 30 nests). At the 225th km we saw another 12 Little Terns. At the 191st km, 20-30 Terns were recorded, two (2) of them being Little, the rest Common Terns. From the 167th to 120th km we counted 17 Little and 4 Common Terns. The total number of Terns counted on the Drava section from Legrad to the Danube river was 50 Little and 80 Common Terns. In view of the temporal pattern of the breeding biology of both species, the realistic assessment for the breeding Little Terns in 2000 would be 25 pairs, while as far as the Common Tern is concerned, the date of counting was already too late. Goran ^i`me{ija, Brodarska 27, HR-40328 Donja Dubrava, Croatia Veliki skovik Otus scops Eu­rasi­an Sco­ps Owl – preying on Great Peacock Moth Saturnia pyri by street lamp in Prizdrina village on Pelje{ac Peninsula on May 8th 2001 (S Dalmatia, Croatia) Prehrana velikega skovika je tudi zaradi njegove skoraj izklju~ne insektivornosti slabo poznana. Podatki, pa ~eprav le prilo`nostno zbrani, so zato toliko bolj dragoceni. Dne 8.5.2001 sem v osrednjem delu polotoka Pelje{ac (ju`na Dalmacija) popisoval velike skovike po vaseh z metodo predvajanja njihovih posnetih glasov. V vasi Prizdrina, kjer sem na{tel pet (5) pojo~ih samcev, sem opazoval, kako veliki skovik izkori{~a va{ke obcestne svetilke pri lovu. Eno od dveh popisnih to~k v vasi Prizdrina sem izbral tik pod svetilko. Na izzivanje se je skovik naglo odzval, saj je bil `e po enominutnem predvajanju posnetka ves razburjen na `ici tik ob svetilki. Skovik pa je v hipu pozabil na posnetek, ko je k lu~i priletel veliki no~ni pavlin~ek Saturnia pyri. Po kraj{em opazovanju se je silovito pognal naprej z nogami za pavlin~kom, vendar neuspe{no. Prvemu je sledil {e drugi poskus, tokrat uspe{en. Veliki skovik je pravcati strokovnjak za lov na velike `u`elke in o~itno se loti tudi tako velikega plena, kakr{en je veliki no~ni pavlin~ek, najve~ja vrsta metulja v teh krajih, saj ~ez krila meri od 87 do 166 mm. Pre`anje velikega skovika ob obcestnih svetilkah je sicer znan pojav [König, C., F. Weick & J.-H. Becking (1999): Owls. Pica Press, Sussex], pomemben verjetno tudi za ve~jo zgostitev skovikov v naseljih. Veliki no~ni metulji pa lahko sestavljajo pomemben del prehrane velikega skovika. Na Kreti so se naprimer skoviki skoraj izklju~no prehranjevali z oleandrovci Daphnis nerii [Mikkola, H. (1983): Owls of Europe. T & AD Poyser, London]. Al Vrezec, Pra`akova 11, SI-1000 Ljubljana, Slovenia Hudournik Apus apus Swi­ft – colony of about 100 pairs discovered on the islet of Dinga~ki {kolj (9 m a.s.l.) by SW coast of Pelje{ac Peninsula in 2001 (S Dalmatia, Croatia). The colony is unique in S Dalmatia, as no other Swift’s colony has been found on such small islet with no overhanging rocks present. Other discovered colonies on the islands of S Dalmatia, mainly colonies of Alpine Swifts Tachymarptis melba and Pallid Swifts Apus pallidus, were found on larger islands with big overhanging rocks present. Hudournik je kolonijska gnezdilka, ki gnezdi ve~inoma v stenah, po stavbah, v klifih, kamnolomih in po drevesih [Cramp, S. (ed.) (1985): The Birds of the Western Palearctic, Vol. IV. Oxford University Press, Oxford]. V Dalmaciji hudourniki naseljujejo tudi manj{e skalnate oto~ke in ~eri,