Piotr Matyjasiak, Wydział Biologii i Nauk o Środowisku, Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie, ul. Wóycickiego 1/3, PL-01-938 Warszawa,
e-mail: p.matyjasiak@uksw.edu.pl
Mateusz Okołowski, Jan Pinowski, Muzeum i Instytut Zoologii PAN, ul. Wilcza 64,
PL-00-679 Warszawa

Abstract. The aim of this study was to compare the numbers and species composition of water-bird assemblages observed on a 7-kilometer section of the Vistula River below Warsaw (Łomianki commune, 52°22’N, 20°53’E) during 1980-1981 and 2008-2009. Counts were carried out on an annual basis in 5 distinct phonological periods: winter (25 December – 14 February), early spring (15 February – 30 April), late spring (1 May – 30 June), summer (1 July – 30 September) and autumn (1 October – 24 December). A total of 105 counts were performed, of which 65 were performed in the period 1980-1981 (with a frequency of 1-5 times per month) and 40 in the period 2008-2009 (frequency of 2 times a month). The study included birds occurring in the river bed or passing along the river. Changes in the annual cycle of densities of the whole assemblage and of the individual species of water-birds were similar in the first and second period of the study. Total densities of bird assemblages in the corresponding phenological periods of both study periods were similar. In 2008-2009, all phenological periods were characterized by a greater species richness and greater overall species diversity of water-bird assemblages compared to the period 1980-1981. Overall, densities of 22 species were higher in the second period than in the first period. These were the following species: Mute Swan Cygnus olor, Whooper Swan C. cygnus, Graylag Goose Anser anser, Bean Goose A. fabalis, Gadwall Anas strepera, Teal A. crecca, Tufted Duck Aythya fuligula, Pochard A. ferina, Goldeneye Bucephala clangula, Goosander Mergus merganser, Great Cormorant Phalacrocorax carbo, Little Egret Egretta garzetta, Great Egret Ardea alba, Grey Heron A. cinerea, Black Stork Ciconia nigra, White-tailed Eagle Haliaeetus albicilla, Oystercatcher Haematopus ostralegus, Common Sandpiper Actitis hypoleucos, Mediterranean Gull Larus melanocephalus, gulls from the Herring Gull complex L. argentatus sensu lato, Whiskered Tern Chlidonias hybridus and White-winged Terns C. leucopterus. In most of the above species, the observed differences in numbers between the two study periods could be explained by the growing trends of national populations of these species, often accompanied by expansion of the species ranges. For
5 species the densities were lower in the second than in the first study period. In the case of Great Crested Grebe Podiceps cristatus and Coot Fulica atra the difference in densities can be explained by decreasing trends of their national populations. However, the lower densities of Black-headed Gull Chroicocephalus ridibundus, Common Gull Larus canus and Great Black-backed Gull
L. marinus in the second study period could be the result of the elimination of a large municipal waste landfill located in the vicinity of the study area. Substantial increases in the number of Cormorant and gulls from the Herring Gull complex, and declines in Black-headed Gull and Common Gull affected to some degree the structure of the water-bird assemblages, especially during the late spring and summer phonological periods.

Lesiński G., Wojtaszyn G. 2016. Food composition of the Barn Owl Tyto alba in  lower Noteć valley in 2002. Kulon 21: 23-29.

Grzegorz Lesiński, Wydział Nauk o Zwierzętach, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie, ul. Ciszewskiego 8, PL-02-787 Warszawa,
e-mail: glesinski@wp.pl
Grzegorz Wojtaszyn, Polskie Towarzystwo Ochrony Przyrody „Salamandra”,
ul. Stolarska 7/3, PL-60-788 Poznań, e-mail: grzegwojt2@wp.pl

Abstract. The Barn Owl Tyto alba pellets were collected at seven sites in the lower Noteć valley and surrounding area in 2002. In total, 1,471 individuals of vertebrate owls’ prey were indentified in the analysed bone material. Small mammals dominated the sample of owls’ food, and constituted to 99.5% of the prey items. The contribution of birds was clearly lower (0.4%), while amphibians were only accidentally preyed (0.1%). Within mammals the most frequently captured species were: Common Shrew Sorex araneus (54.9%), as well as Common Vole Microtus arvalis and House Mouse Mus musculus. In two localities the food composition was compared between years 1984 and 2002, and relatively low differences were recorded. Rarely noted mammal species were found: three new localities of Lesser White-toothed Shrew Crocidura suaveolens and two localities of Water Vole Arvicola amphibius.

Lesiński G., Beuch S. 2016. Small mammal community in suburban forests of Bytom based on the analysis of Tawny Owl’s Strix aluco diet. Kulon 21: 31-39.

Grzegorz Lesiński, Wydział Nauk o Zwierzętach, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie, ul. Ciszewskiego 8, PL-02-787 Warszawa,
e-mail: glesinski@wp.pl
Szymon Beuch, Dział Przyrody, Muzeum Górnośląskie w Bytomiu, Pl. Jana III Sobieskiego 2, PL-41-902 Bytom, e-mail: szymon.beuch@gmail.com

Abstract. Small mammal community in suburban forests of Bytom was estimated by using an analysis of the Tawny Owl’s Strix aluco pellets. Material collected between 2011 and 2016 contained remains of 324 individuals of mammals belonging to 14 species. Three most frequently noted species (Bank Vole Myodes glareolus, Yellow-necked Mouse Apodemus flavicollis and Common Shrew Sorex araneus) belong to dominating small mammal communities in Polish forests. Species avoiding human-transformed areas: Water Vole Arvicola amphibius, Field Vole Microtus agrestis and Common Dormouse Muscardinus avellanarius were rarely captured by owls. The presence of Common Vole Microtus arvalis and Lesser White-toothed Shrew Crocidura suaveolens suggests that owls’ hunting grounds covered at least edges of open areas. As the forests where the study was conducted were contiguous to a large urban agglomeration, the species richness of small mammal community can be estimated as relatively high. 

Lesiński G. 2016. Small mammals of „Dębina I” reserve in the eastern Masovia on the basis of  food composition of Tawny Owls Strix aluco. Kulon 21: 41-47.

Wydział Nauk o Zwierzętach, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie,
ul. Ciszewskiego 8, PL-02-787 Warszawa, e-mail: glesinski@wp.pl

Abstract. In the years 2007-2016 the food composition of Tawny Owls Strix aluco was examined in „Dębina I” reserve in Masovian Voivodship (52.40°N, 21.38°E). In the analysed bone material 2,655 vertebrate prey items were found, among which there were 1,513 individuals of mammals. On that basis, it was established that the area and the nearest surrounding were inhabited by at least 21 species of small mammals. The following species were recorded: three soricomorphs Soricomorpha, eight bats Chiroptera, nine rodents Rodentia and one of the order Carnivora. All of them belong to species whose ranges cover the whole Masovia. Substantial forest fragmentation and the lack of connection with larger forests could be responsible for the absence of some rodent species which ranges cover this part of the country. It is worth emphasizing the presence of relatively rich assemblage of bats, among which Lesser Noctule Nyctalus leisleri and Brandt’s Bat Myotis brandtii are valuable and rarely noted species. The most often species preyed by owls were the following: among bats – Brown Long-eared Bat Plecotus auritus (20 out of 35 individuals, 1.3% of mammalian prey), soricomorphs – Common Shrew Sorex araneus (5.6%), rodents – Yellow
-necked Mouse Apodemus flavicollis (29,0%) and Bank Vole Myodes glareolus (23,5%). 

Hajdamowicz I., Stańska M., Król A., Hirler A., Nicewicz Ł. 2016. Rare and endangered spider species in cereals in the Lublin Province. Kulon 21: 49-61.

Izabela Hajdamowicz, Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach, Wydział Przyrodniczy, Instytut Biologii, ul. Prusa 12, PL-08-110 Siedlce,
e-mail: izabela.hajdamowicz@uph.edu.pl
Marzena Stańska, Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach, Wydział Przyrodniczy, Instytut Biologii, ul. Prusa 12, PL-08-110 Siedlce,
e-mail: marzena.stanska@uph.edu.pl
Anna Król, Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach, Wydział Przyrodniczy, Instytut Agronomii, ul. Prusa 14, PL-08-110 Siedlce,
e-mail: anna.krol@uph.edu.pl
Andreas Hirler, Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach, Wydział Przyrodniczy, Instytut Biologii, ul. Prusa 12, PL-08-110 Siedlce,
e-mail: andreas.hirler@uph.edu.pl
Łukasz Nicewicz, Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach, Wydział Przyrodniczy, Instytut Biologii, ul. Prusa 12, PL-08-110 Siedlce,
e-mail: lukasz.nicewicz@uph.edu.pl

Abstract. The study was conducted in the Lublin Province, mainly in High Nature Value farmlands along the valleys of the rivers Bug, Tyśmienica and Wieprz. Samples were collected during four years (2012-2015) in study plots located in winter cereals of organic (E) and low-input conventional farming systems (K). Epigeic and epiphytic spiders were caught by using pitfall traps and sweep net, respectively. In Total, 167 individuals from 30 rare and endangered species were collected, which accounted for 0.25% of the totally caught specimens and 13% of all species found. Two species belonged to the category ‘endangered’ (EN) in Poland; 20 species were vulnerable (VU) and seven species with deficient data (DD). The most abundant rare and endangered spider species were by name as follows: Thanatus arenarius, Pardosa maisa and Porrhomma microphthalmum. Statistically significant differences in the number of individuals and the number of rare and endangered spider species, between winter cereals in organic and low-input conventional farming systems were not revealed.

Romanowski M., Romanowski J. 2016. Overwintering of the Thirteen-spotted lady beetle Hippodamia tredecimpunctata (Coleoptera: Coccinellidae) in Kampinos Forest. Kulon 21: 63-67.

Mateusz Romanowski, Wydział Biologii i Nauk o Środowisku, Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie, ul. Wóycickiego 1/3, PL-01-938 Warszawa, Koło Biologów Terenowych UKSW, e-mail: piastuch19@gmail.com
Jerzy Romanowski, Wydział Biologii i Nauk o Środowisku, Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie, ul. Wóycickiego 1/3, PL-01-938 Warszawa, e-mail: j.romanowski@uksw.edu.pl

Abstract. We investigated ladybirds overwintering in agricultural landscape near Brzozówka in Kampinos Forest (Central Poland). Altogether, 180 samples of litter were collected in six habitats: on psammophilous grassland, under Scots pines Pinus sylvestris on fallow, in patches of mixed pine and alder forests, and under freestanding oaks. In total, we recorded 141 ladybird individuals representing seven species: Anatis ocellata, Coccinella septempunctata, Coccinula quatuordecimpustulata, Exochomus quadripustulatus, Hippodamia tredecimpunctata, Propylea quatuordecimpunctata, Psyllobora vigintiduopunctata, and Tytthaspis sedecimpunctata. The dominant species was C. septempunctata (111 individuals), followed by H. tredecimpunctata (15 ind.). The relatively high numbers of H. tredecimpunctata hibernating in the litter under pines is interesting. This species is associated with humid habitats in the growing season and was recorded in very low numbers in previous studies on the hibernation of ladybirds in Kampinoski National Park.

Ceryngier P., Krzysztofiak A., Romanowski J. 2016. NEW DATA ON LADYBIRD BEETLES (COLEOPTERA: COCCINELLIDAE) OF WIGRY NATIONAL PARK. Kulon 21: 69-74.

Piotr Ceryngier, Jerzy Romanowski, Wydział Biologii i Nauk o Środowisku UKSW,
ul. Wóycickiego 1/3, PL-01-938 Warszawa,
e-mail: p.ceryngier@uksw.edu.pl, j.romanowski@uksw.edu.pl
Anna Krzysztofiak, Wigierski Park Narodowy, Krzywe 82, PL-16-402 Suwałki,
e-mail; krzysztofiak.anna@gmail.com

Abstract. Ladybird beetles were surveyed in 2014-2016 in Wigry National Park (NE Poland). Thirty three species were recorded. The most abundant were Subcoccinella vigintiquatuorpunctata (20% of all ladybird individuals) and Coccinella quinquepunctata (17% of all individuals). Contribution of the invasive harlequin ladybird (Harmonia axyridis) was low (1% of all individuals). Seven species registered in this study (Coccidula rufa, Scymnus suturalis, S. nigrinus, Stethorus pusillus, Vibidia duodecimguttata, Anatis ocellata and Coccinella magnifica) have not previously been reported from the area of Wigry National Park. At present, 45 species of ladybird beetles are known to occur in Wigry National Park.

Stolarz P., Rzępała M., Chmielewski S., Krasnodębski I., Ilczuk M., Kopik J. 2016. NEW SITES OF THE HAIRY FLOWER WASP SCOLIA HIRTA (HYMENOPTERA: SCOLIIDAE) IN THE MAZOWIECKA LOWLAND. Kulon 21: 74-78.

Przemysław Stolarz, Centrum Ekologii Człowieka, ul. Kościuszki 24, PL-05-075 Warszawa-Wesoła, e-mail: przem.stolarz@gmail.com
Mirosław Rzępała, Ireneusz Krasnodębski, Marcin Ilczuk, Towarzystwo Przyrodnicze Bocian, ul. Radomska 22 lok. 32, PL-00-323 Warszawa,
e-mail: mirek@bocian.org.pl
Sławomir Chmielewski, ul. Rynek 12, PL-05-640 Mogielnica, e-mail: sch6@wp.pl

Abstract. In 2010-2016, we recorded 24 new sites of the hairy flower wasp Scolia hirta – the species listed in the Polish Red Data Book of Invertebrates – in the Mazowiecka Lowland (central Poland), mainly in its southern and eastern part. 7 sites are located in the Mazowiecki Landscape Park and 2 in the Nadbużański Landscape Park.

Miłkowski M., Buchholz L. 2016. SCELIPHRON DESTILLATORIUM (ILLIGER, 1807) (HYMENOPTERA: SPHECIDAE) – NEW LOCALITIES IN THE MAŁOPOLSKA UPLAND AND IN THE ŚWIĘTOKRZYSKIE MOUNTAIN. Kulon 21: 81-82.

Marek Miłkowski, ul. Królowej Jadwigi 19 m 21, PL-26-600 Radom,
e-mail: milkowski63@wp.pl
Lech Buchholz, Świętokrzyski Park Narodowy, ul. Suchedniowska 4, PL-26-010 Bodzentyn, e-mail: ampedus@poczta.onet.pl

Abstract. In the years 2015-2016, new localities of mud dauber wasp Sceliphron destillatorium (Illiger, 1807) were found in the Małopolska Upland and in the Świętokrzyskie Mountains. The species has not yet been recorded neither from Radom and the Kozienice Forest nor from the Świętokrzyski National Park. In Poland, Sceliphron destillatorium is spreading its range in north-western direction.

Strużyński W., Pestis V., Dobruk Y., Balcerak M. 2016. PERCCOTTUS GLENII  IN OXBOW LAKES OF THE VISTULA RIVER IN THE MAZOVIAN LOWLAND  IN POLAND AND WETLAND IN BELARUS (NEAR DROHICZYN). Kulon 21: 83-87.

Witold Strużyński, Marek Balcerak, Wydział Nauk o Zwierzętach, Szkoła Główna Gospodarstwa Wiejskiego, ul. Ciszewskiego 8, PL-02-787 Warszawa
Vitold Pestis, Yevgeny Dobruk, Grodno State Agrarian University, Belarus, Grodno 230008 Tereshkova street, 28

Abstract. The aim of the study was to record the occurrence several populations of Perccottus glenii from small drainage canals in wetland in Belarus (near Drohiczyn) and small Vistula oxbow lakes in Mazovia (Poland). Probably, populations of Perccottus glenii can eliminate larval and juvenile forms of local amphibians.

Chmielewski S. 2016. A HIGH NUMBER OF DEAD GRASS SNAKES NATRIX NATRIX ON A LOCAL ROAD. Kulon 21: 89-92.

PL-05-640 Mogielnica, ul. Rynek 12, e-mail: sch6@wp.pl

Abstract. On 3 October 2015,  on the local, asphalt road Borek – Pagowiec (51°35’40’’N, 21°0’47’’E, Central Poland), 74 dead grass snakes Natrix natrix (0.8 ind./10 m) were found, and two alive  on the road side. The inventory was conducted along the road section of 916 m. Young and adult snakes were  present. This road section separated a peatland of about 200 ha from fragments of a pine forest. Observation of such a high number of dead individuals could be an indication of migration to their overwintering sites, or of the use of warm asphalt. On that day, the air temperature was high, +20°C. This was one of the last three warmest days in 2015 (Figure). 

Dombrowski A., Trębicki Ł., Nicewicz Ł. 2016. CHANGES IN NUMBERS OF BIRDS OF PREY ACCIPITRIFORMES  AND FALCONIFORMES IN THE POSTBREEDING PERIOD IN THE AGRICULTURAL LANDSCAPE NEAR SIEDLCE. Kulon 21: 93-101.

Andrzej Dombrowski, Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne,
ul. Świerkowa 18, PL-08-110 Siedlce, e-mail: adomb@wp.pl
Łukasz Trębicki i Łukasz Nicewicz, Uniwersytet Przyrodniczo-Humanistyczny
w Siedlacach, Wydział Przyrodniczy, Katedra Zoologii, ul. Prusa 12, PL-08-110 Siedlce

Abstract. In the periods 4 November 2011 to 15 March 2012 and 14 August  to 21 November 2012, 11 surveys of birds of prey Accipitriformes and Falconiformes were conducted in the Zbuczyn area (56.3 square km) near Siedlce (E. Poland). Only stationary birds (resting or foraging) are included, without those flying high on migration. In the postbreeding season 2011-2012, a total of 11 species of the two orders of birds of prey were noted, varying from one to seven species and from eight to 57 individuals per survey. In total 314 birds were recorded. The most abundant species was the Buzzard Buteo buteo (N=265), contributing to 84.4% of all birds of prey. Buzzards were most abundant in the period of early autumn migration, with a highest density of 12.0 ind./10 square km of open area (grassland and cropland) and a lowest density in the early winter and late winter periods (1.8 ind./10 square km in each). Over the whole winter period (15 December – 17 February), the mean density was 3.0 ind./10 square km. In the late autumn period (November) of the two seasons (2011 and 2012), numbers of Buzzards did not differ markedly, varying from 19 to 25 individuals. Numbers of other species were much lower: Marsh Harrier Circus aeruginosus (N=17), Kestrel Falco tinnunculus (N=10); Rough-legged Buzzard Buteo lagopus (N=6), and Montagu’s Harrier Circus pygargus (N=5). Numbers of the remaining species did not exceed 4 individuals over the study period. The assemblage of birds of prey near Siedlce had the same species composition and dominance structure (Re=79) as that near Hajnówka monitored as the same time (Pugacewicz 2012). But their numbers were higher near Hajnówka. In total, 432 birds were recorded (9.4 ind./10 square km/survey), as compared with 314 birds (6.3 ind./10 square km/survey) near Siedlce. The densities of buzzards near Siedlce were lower than near Hajnówka. This was likely due to a lower available food supply, the proportion of open habitats being similar in the two areas. The pattern of changes in numbers of buzzards was similar in the two areas.

Matyjasiak Ł. 2016. AUTUMNAL FLIGHTS OF WATERBIRDS ABOVE THE MIDDLE VISTULA RIVER NEAR KONSTANCIN-JEZIORNA IN 2015. Kulon 21: 101-107.

ul. Willowa 17, PL-05-520 Konstancin-Jeziorna, e-mail: lukaszm@legionista.com

Abstract. The Middle Vistula Valley, and especially its section crossing three nature reserves, Łachy Brzeskie, Wyspy Świderskie, and Wyspy Zawadowskie, is an important stopover and foraging sitefor non-passerine waterbirds  during autumn migration. The presence of many bird species, in particular Charadriiformes, depends on the water level in the river channel, that is, on the available food supply on sandy islands, shoals and silt.

Gryz J., Krauze-Gryz D. 2016. DIET COMPOSITION OF LONG-EARD OWL ASIO OTUS  NESTING IN THE AREA OF GŁUCHÓW COMMUNE (CENTRAL POLAND). Kulon 21: 107-109.

Jakub Gryz, Zakład Ekologii Lasu, Instytut Badawczy Leśnictwa, Sękocin Stary,
ul. Braci Leśnej 3, PL-05-090 Raszyn, e-mail: j.gryz@ibles.waw.pl
Dagny Krauze-Gryz, Samodzielny Zakład Zoologii Leśnej i Łowiectwa, Wydział Leśny, SGGW w Warszawie, ul. Nowoursynowska 159, PL-02-776 Warszawa,
e-mail: dagny.krauze@wl.sggw.waw.pl

Abstract. The analysed pellet material was collected in the years 2014-2015 in the forest complex Prusy, a part of Rogów Forest District. Diet of owls was dominated by voles Microtus spp., accounting for 76% of prey items. The contribution of Muridae was 13% and the total contribution of rodents was close to 90%. Common shrews, birds and insects supplemented the diet.

Paczuska M. 2016. THE SUMMER LARDERS  OF THE GREAT GREY SHRIKE LANIUS EXCUBITOR IN EASTERN POLAND. Kulon 21: 109-113.

Katedra Zoologii, Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach, ul. Prusa 12,
PL-08-110 Siedlce, e-mail: martynapaczuska@wp.pl

Abstract. ummer larders  of the Great Grey Shrike Lanius excubitor were examined in the South-Podlasian Lowland (52°12’N, 22°31’E) during the April-October periods of 2015 and 2016 In total, 39 prey were recorded of five  classes and nine orders. Rodents  Rodentia predominated, followed by beetles Coleoptera and orthopterans Orthoptera. Among  rodents, most frequently recorded was the Common Vole Microtus arvalis, among beetles, the Dung Beetle Geotrupes stercocrarius, and among orthopterans, the Field Cricket Gryllus campestris was the most frequent prey in larders.

Murawski M., Krupiński D., Szczęch R. 2016. LARGE GROUPS OF THE MONTAGU’S HARRIER CIRCUS PYGARGUS ROOSTING IN EASTERN POLAND. Kulon 21: 114-118.

Marek Murawski, ul. Armii Krajowej 18/22, PL-06-400 Ciechanów,
e-mail: merops@vp.pl  
Dominik Krupiński, Rakowiska, ul. Budziszewska 26, PL-21-500 Biała Podlaska,
e-mail: dominik@bocian.org.pl
Rafał Szczęch, ul. Załońska 31, Pl-17-111 Boćki, e-mail: rafalszczech83@op.pl

Abstract. So far, the communal  roosting  of  the Montagu’s Harrier Circus pygargus is poorly known. The largest breeding populations of this species known from Poland  occur in the Mazovian Lowland and in the Biebrza  Basin. Also the largest roosting assemblages of the the Montagu’s Harrier were recorded there in mixed groups  with the Marsh Harrier Circus aeruginosus. It is likely that such large assemblages of birds reduce predation risk, and are so called „information centres” for young individuals.

Pagórski P., Krupiński D. 2016. NESTING OF THE MONTAGU’S HARRIER CIRRUS PYGARGUS NEAR FARM BUILDINGS. Kulon 21: 118-120.

Piotr Pagórski, ul. Powstańców Wlkp.3, PL-06-500 Mława,
e-mail: tiktak-mlawa@tlen.pl
Dominik Krupiński, Rakowiska, ul. Budziszewska 26, PL-21-500 Biała Podlaska,
e-mail: dominik@bocian.org.pl

Abstract. In 2015, we noted two cases of the Montagu’s Harrier Cirrus pygargus nesting very close (20m and 23m) to farm buildings in the agricultural landscape of the Mazovian Lowland. In the locality Olszewo-Grzymki, a nest was found containing a small nestling and four eggs, which was located in a 1-ha triticale crop field at a distance of 23 m from the nearest farm building. On the next visit, the nest was already abandoned. The second case took place near the locality Ukazy. The nest was placed in a triticale  crop field at a distance of 20 m from the farm fence. The pair raised one chick. In the Mazovian Lowland at the end of the 1990s nests were  located 150-200 m from farms, but during the recent 10-years the nests have been frequently discovered  at a distance of 70-150 m.

Olszewski A., Matuszewski S., Wojdylak W. 2016. THE THIRD CASE OF NESTING THE AVOCET RECURVIROSTRA AVOSETTA ON THE MAZOWIECKA LOWLAND. Kulon 21: 120-124.

Adam Olszewski, Kampinoski Park Narodowy, ul. Tetmajera 38, PL-05-080 Izabelin, e-mail: ad.ol@wp.pl
Stanisław Matuszewski, e-mail: acpl_2@yahoo.pl
Waldemar Wojdylak, e-mail: waldemar.wojdylak@gmail.com

Abstract. On 13 May to 11 June 2016,  one pair of the Avocet Recurvirostra avosetta nested on the field water pool located at the southern end of the Biosphere Reserve „Kampinos Forest” (the Warsaw West district).This pair was accompanied by two other individuals of this species. After nearly 3 weeks of incubation, the eggs were eaten by a fox, which was recorded by automatic camera-traps. Water level decrease enabled an easy access to the nest. Birds did not attempt to repeat breeding. This record was approved by the Avifaunistic Commission.

Gryz J, Krauze-Gryz D. 2016. A NEW RECORD OF the NIGHTJAR CAPRIMULGUS EUROPAEUS IN WARSAW. Kulon 21: 124-125.

Jakub Gryz, Zakład Ekologii Lasu, Instytut Badawczy Leśnictwa, Sękocin Stary,
ul. Braci Leśnej 3, PL-05-090 Raszyn, e-mail: j.gryz@ibles.waw.pl
Dagny Krauze-Gryz, Samodzielny Zakład Zoologii Leśnej i Łowiectwa, Wydział Leśny, SGGW w Warszawie ul. Nowoursynowska 159, PL-02-776 Warszawa,
e-mail: dagny.krauze@wl.sggw.waw.pl

Abstract. On June 16, 2016, a nightjar was recorded in the south-eastern part of Warsaw. One individual called spontaneously in compartment 4 of the Sobieski Forest,. This was a dune supporting  pine forest Pinus sylvestris, with an admixture of silver birch Betula verrucosa and common juniper Juniperus communis. Based on the  time and place of the observation, one can assume that this was a breeding species in the area. The species was not recorded in the area of Warsaw, in its nesting habitat, for the last 30 years.

Strużyński W., Górski P., Yanuta G., Balcerak M. 2016. OCCURRENCE OF PLATYPSYLLUS CASTORIS (RITSEMA, 1869) (COLEOPTERA: LEIODIDAE) AND STICHORCHIS SUBTRI­QUETRUS, (RUDOLPHI, 1814) (ECHINOSTOMIDA: PARAMPHISTOMATIDAE) IN THE EUROPEAN BEAVER CASTOR FIBER ON THE FISH FARM NOVOSIOLKY, BELARUS. Kulon 21: 127-130.

Witold Strużyński, Marek Balcerak, Wydział Nauk o Zwierzętach, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie, ul. Ciszewskiego 8, PL-02-787 Warszawa
Paweł Górski, Wydział Medycyny Weterynaryjnej, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie, ul. Ciszewskiego 8, PL-02-787 Warszawa
Grigory Yanuta, Naukowo Praktyczne Centrum d/s Zasobów Przyrodniczych, Białoruska Akademia Nauk, Akademicheskaja 27, 220072 Minsk Belarus

Abstract. In gastrointestinal system of four beavers from the Fish Farm Novosiolky (Belarus), we discovered some parasites identified as Platypsyllus castoris (Coleoptera) and Stichorchis subtriquetrus (Trematoda). Platypsyllus castoris was found only in adult Castor fiber, among them 14 to 32 individuals. In all beavers caught we found 87-652 individuals of trematoda.

Romanowski J., Winczek M., Ceryngier P. 2016. RECORDS OF THE ASIAN CLAM CORBICULA FLUMINEA (O. F. MÜLLER, 1774) (VENEROIDA: CORBICULIDAE) IN THE VISTULA RIVER IN WARSA. Kulon 21: 131-133.

Jerzy Romanowski, Piotr Ceryngier, Wydział Biologii i Nauk o Środowisku UKSW,
ul. Wóycickiego 1/3, PL-01-938 Warszawa,
e-mail: j.romanowski@uksw.edu.pl, p.ceryngier@uksw.edu.pl
Michał Winczek, Wydział Biologii i Nauk o Środowisku UKSW, ul. Wóycickiego 1/3, PL-01-938 Warszawa, Koło Biologów Terenowych UKSW,
e-mail: michal.winczek@gmail.co

Abstract. Two empty shells of the Asian clam Corbicula fluminea were recorded on left bank of Vistula river in Warsaw (52°17’07”N, 20°59’42”E) on 29 June, 2016 (photo 4). Altogether, 19 paired and 76 single empty valves were collected during following surveys of left and right banks of the river and two oxbows within city limits in July and August 2016. A total of 8 live bivalves were collected from the river bed and the oxbow at the depth of about 40 cm. The largest empty shell was 31.6 mm wide and 29.1 mm long. The live specimens measured 9.4-22.5 mm in width and 8.3-25.2 mm in length. The records of the Asian clam Corbicula fluminea in Warsaw document spreading of this invasive species down the Vistula River from the upper part of the river.

Łukaszewicz M., Rowiński P. 2016. RECORDS OF THE ASIAN CLAM CORBICULA FLUMINEA (O. F. MÜLLER, 1774) (VENEROIDA: CORBICULIDAE) IN THE VISTULA RIVER IN WARSA. Kulon 21: 135-1443.

Marcin Łukaszewicz, Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne, ul. Radomska 7, PL-26-670 Pionki, e-mail: lukaszewicz-m@wp.pl
Patryk Rowiński, Katedra Ochrony Lasu i Ekologii, Szkoła Główna Gospodarstwa Wiejskiego, ul. Nowoursynowska 159, PL-02-776 Warszawa, e-mail: nuthatch@wp.pl

Abstract. Counts of birds wintering in river valleys and other objects in the Mazovian Lowland were conducted in the period 16-24 January, 2016 along 17 rivers of different size classes. Birds were also observed in other places of the concentration of waterbirds, such as towns and dam reservoirs. 95 observers participated in this action. In total, 1215 km of the river course were surveyed. The winter of 2015/2016 was rather frosty, and mean daily temperatures during bird counts varied between -5°C and -10°C. The water level in the Vistula River and its basin was within the mean and low zones. The surveyed water bodies were totally covered with ice. In January 2016, 104 wintering bird species were noted (tabs 1 and 2), with a total of nearly 80 thousand individuals. There were 39 species of waterbirds, with a total of 52 889 individuals. The most abundant species was the Mallard Anas platyrhynchos – 73.6%, rather abundant were also: Black-headed Gull Chroicocephalus ridibundus (4.8%), Goosander Mergus merganser (3.9%), Goldeneye Bucephala clangula (3.7%), Mute Swan Cygnus olor (3.5%), not identified large Gulls Larus spp. (3.2%), and Cormorant Phalacrocorax carbo (2.7%). Land species were represented by 65 species with a total of 26 933 individuals. The most abundant were: Siskin Spinus spinus (12.2% of the assemblage, 27 ind./10 km) and Fieldfare Turdus pilaris (12% of the assemblage, 26.6 ind./10 km). The dominant species included also: Jackdaw Corvus monedula (8.1%), Yellowhammer Emberiza citrinella (7.9%) and Great Tit Parus major (6.9%). The mean density of birds was 221.7 ind./10 km, and it was similar to the mean  from the previous five years (202.8 ind./10 km).