Japanese Journal of Ornithology

On the Intestinal Twistings in Gadfly-petrels and Comparative Notes on the Digestive Tract in Procellariiformes

Nagahisa KURODA

1986 Volume 35 Issue 1 Pages 1-14
Published: October 25, 1986
Released on J-STAGE: September 28, 2007

DOIhttps://doi.org/10.3838/jjo.35.1

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Breeding Bird Community in a Deciduous Broad-leaved Forest in Southern Hokkaido, Japan

Yuzo FUJIMAKI

1986 Volume 35 Issue 1 Pages 15-23
Published: October 25, 1986
Released on J-STAGE: September 28, 2007

DOIhttps://doi.org/10.3838/jjo.35.15

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Bird populations were censused by the spot-mapping method in a natural deciduous broad-leaved forest at Tomakomai, southern Hokkaiso, during the breeding seasons of 1982 and 1983. During the study period 44 bird species were recorded;35 species occupied territories within the study area. The most abundant species were Ficedula narcissina, Cettia squameiceps, Phylloscopus occipitalis, Parus palustris, Parus major, Sitta europaea, and Passer rutilans. Although the total number of trees of 5 cm DBH and larger and basal area decreased from 1, 665/ha and 27.65 m²/ha respectively in 1982 to 1, 060 and 18.75 m²/ha in 1983, the species composition and the number of pairs for most birds did not differ significantly between 1982 and 1983. The diversity of the bird community, as calculated by the SHANNON-WEAVER formula, is 4.27 in 1982 and 4.44 in 1983. The results were discussed in comparison with some other bird community studies done in Hokkaido.

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Passerine Birds Nesting close to the Nests of birds of Prey

Hiroshi UCHIDA

1986 Volume 35 Issue 1 Pages 25-32
Published: October 25, 1986
Released on J-STAGE: September 28, 2007

DOIhttps://doi.org/10.3838/jjo.35.25

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The present paper gives an account of observations of the passerine birds nesting in associa-tion with some species of birds of prey in central Honshu in 1968-84.
1) Of 11 nests of Grey-faced Buzzrard-eagles Butastur indicus, Tree Sparrows Passer montanus, which normally do not occur in the nesting site of Butastur, were frequently observed at 9 nests;9 nests of Tree Sparrows were also found within a radius of several meters of 4 nests of Butastur.Moreover, the Tree Sparrows occurred there only from mid-May to early July, the period of breeding of Butastur.
2) Of 6 nests of Honey Buzzards Pernis apivorus, 4 nests were associated with the breeding of the sparrows, whose 2 nests were found very close to the nests of the buzzards.
3) At 10 nests of Japanese Lesser Sparrowhawks Accipiter gularis, flocks of Azure-winged Magpies Cyanopica cyana were often observed and 7 nests of the magpies were found within a radius of 10 m at 5 nests of Accipiter.The other 2 nests of the sparrowhawks were abandoned before the magpie started to breed.However, before the abandonment the magpies often visited the nesting sites of the sparrowhawks.
5) No passerine birds were observed to breed at or close to 19 nests of Goshawks Accipiper gentilis.

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The First Record of the Bonaparte's Gull in Japan

Mitsuo IMAI, Shigeo OZAWA, Tadao SHINBA

1986 Volume 35 Issue 1 Pages 33-34
Published: October 25, 1986
Released on J-STAGE: September 28, 2007

DOIhttps://doi.org/10.3838/jjo.35.33

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The authors observed and photographed a 1st winter Bonaparte's Gull Larus philadelphia at Nakaminato City, Ibaragi Pref. on 14 December 1985. It was seen with flocks of Black-headed Gulls Larus ridibundus. This is the first record of the species in Japan.

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An Invasion of Egrets and Herons in Eastern Hokkaido

Mark BRAZIL

1986 Volume 35 Issue 1 Pages 34-35
Published: October 25, 1986
Released on J-STAGE: September 28, 2007

DOIhttps://doi.org/10.3838/jjo.35.34

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Sight Record of a White-winged Black Term at Taiki, Hokkaido

Yoshiaki IIJIMA

1986 Volume 35 Issue 1 Pages 36-37
Published: October 25, 1986
Released on J-STAGE: September 28, 2007

DOIhttps://doi.org/10.3838/jjo.35.36

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A single summer plumage White-winged Black Tern Sterna leucoptera was observed at the mouth of the Rekifune River, Taiki, Tokachi Distr., Hokkaido, on 22-23 May 1986. It dove frequently and caught small fish which looked like fry salmon, hovered occasionally, and alighted slowly on the water surface and flew up at once after putting the leg into the water. It appeared that the hovering time of the bird was short compared to a Common Tern Sterna hirundo. Moreover, the bird sometimes showed diving behavior like an Osprey Pandion haliaetus. These habits seemed to be different from those previously reported from Japan (cf. TAKANO 1981).

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First Record of Gorsakius melanolophus for Tokushima Pref., Shikoku

Kazuhito YOSHIDA

1986 Volume 35 Issue 1 Pages 37
Published: October 25, 1986
Released on J-STAGE: September 28, 2007

DOIhttps://doi.org/10.3838/jjo.35.37

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A single individual of Malay. Night Heron Gorsakius melanolophus was photographed at the estuary. of the Nakagawa River, Anan City, Tokushima Pref., on 30 May 1984. This is the first record of the species in Japan outside of the Yaeyama Islands, southern Ryukyus, where it breeds.

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Observations of Latham's Snipes at the Sengokubara Moor, Central Honshu

Yuzo MUROBUSHI

1986 Volume 35 Issue 1 Pages 38-39
Published: October 25, 1986
Released on J-STAGE: September 28, 2007

DOIhttps://doi.org/10.3838/jjo.35.38

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Observations of Latham's Snipes Gallinago hardwickii were made at the Sengokubara Moor, Hakone, central Honshu, from 1975 through 1985. They were seen from early April to mid-September, occurring regularly from late April to mid-June. The numbers of birds counted varied from 0 to 6 individuals, usually 1 or 2. During my observations aerial display was seen only once, on 24 April 1979. The birds I observed seemed to be migrating or non-breeding, although they occur throughout the breeding season and had bred regularly in the highlands of central Honshu until about 30 years ago.

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