Arctic Warbler (Phylloscopus borealis) Science Article 2 abstract The Alaska Bird Observatory (ABO) initiated a three-year study in May 2004 to describe the breeding biology and habitat associations of Arctic Warblers (Phylloscopus borealis kennecotti) along the Denali Highway (Milepost 23-34) between Tangle Lakes and Maclaren Summit. Richard Ring, Susan Sharbaugh, and Nancy Dewitt, Alaska Bird […]
Notes on Phyhoseopus coronatus iiimae
Arctic Warbler (Phylloscopus borealis) Science Article 1 abstract Three of these little-known Willow Warblers were taken in the southern part of Okinawa Shims, Riu KM Islands, in the fall of 1945. Unfortunately, two were lost subsequently, but in view of the bird’s rarity, it seems worth while to place on record the notes that were […]
Basal metabolic rate and thermal conductance in Arctic Tern chicks and the effect of heat increment of feeding on thermoregulatory expenses
Arctic Tern (Sterna paradisaea) Science Article 2 abstract Chick basal metabolic rate (BMRc) as oxygen consumption (VO2 in ml O2 g-1 h-1) of unfed individuals of Arctic Terns Sterna paradisaea during development (12-109 g) was best described by the parabolic equation VO2 = 1.25 + 0.061 m-0.00047m2, where m is body mass in g. Interspecific […]
Taxonomy and evolution in Redpolls Carduelis flammea hornemanni a multivariate study of their biometry.
Arctic Redpoll (Carduelis hornemanni) Science Article 2 abstract Multivariate analyses were performed on four standard measurements (wing-chord, tail-length, bill-length and bill-depth) of over 1000 sexed Redpolls, including samples from all currently recognized taxa. Samples of flammea and exilipes, phenotypically defined by colour were separable biometrically, as were samples of rostrata and hornemanni. Dark Redpolls from […]
Notes on the Hoary Redpoll on its central Canadian Arctic breeding grounds
Arctic Redpoll (Carduelis hornemanni) Science Article 1 abstract G. Ron Austing and I made the following observations of the Hoary Redpoll (Acanthis hornemanni) during the period of 30 June to 15 July 1972 while photographing birds around Bathurst Inlet Lodge at the mouth of the Burnside River on Bathurst Inlet (66′ 50′ N., 108′ 02′ […]
THE STATUS OF THE BLACK-THROATED LOON (GAVIA ARCTICA) AS A NORTH AMERICAN BIRD.
Arctic Loon (Gavia arctica) Science Article 3 abstract In collecting and tabulating data for use in the distributional portion of Mr. A. C. Bent’s work on the Life-Histories of North American Birds, the published material on the Black-throated Loon was found to be unsatisfactory F. SEYMOUR HERSEY, The AUK, 34, 1917 Download article download full […]
The impact of water level fluctuation on the breeding success of the Black-throated Diver Gavia arctica in South-west Sweden
Arctic Loon (Gavia arctica) Science Article 1 abstract We evaluated the impact of water level fluctuation on the breeding success of the Blackthroated Diver in South-west Sweden by using results from a one-year study of 43 lakes (49 pairs) in 1996 and surveys of a population of 16-22 pairs at the lake system Fegen- Svansjoarna […]
Mercury exposure to Red-throated Divers [Gavia stellata] and Black-throated Divers [Gavia arctica] in Sweden
Arctic Loon (Gavia arctica) Science Article 2 abstract We investigated concentration of mercury in eggs of Redthroated Diver [Gavia stellata] and Black-throated Diver [Gavia arctica] collected in South and Central Sweden, 1981-1997. In South Sweden (Sydsvenska Hoglandet), mean concentration in Red-throated Diver eggs was remarkably high (6.84 ppm dry weight, 5 pairs), or more than […]
Die aktuelle Situation des SeggenrohrsangersAcrocephalus paludicola in Deutschland
Aquatic Warbler (Acrocephalus paludicola) Science Article 12 abstract During the 20th century the Aquatic Warbler lost nearly all its breeding sites in Germanydue to drainage of fen mires, land reclamation and intensified agriculture. ANGELA HELMECKE et al, Ber. Vogelschutz 40 (2003): 81-89 Download article download full text (pdf)
Identifying autumn migration routes for the globallythreatened Aquatic WarblerAcrocephalus paludicola
Aquatic Warbler (Acrocephalus paludicola) Science Article 3 abstract The migration strategy of the globally threatened Aquatic WarblerAcrocephalus paludicolaneeds to be known to ensure that effective action is taken to conserve its principal stopoversites. R. JULLIARD et al, Ibis(2006), 148, 735-743 Download article download full text (pdf)