Yellow-breasted Crake (Porzana flaviventer) Science Article 1 abstract A lack of agreement as to the generic characters of rails has resulted in many genera that are either poorly defined, monotypic, or composed of groups of unrelated species. Seldom has any taxonomic treatment of this family resulted in what I believe to be natural groupings. Decisions […]
Category: North America
YELLOW-BELLIED SAPSUCKER, SPHYRAPICUS VARIUS, IN ALASKA
Yellow-bellied Sapsucker (Sphyrapicus varius) Science Article 3 abstract The Yellow-bellied Sapsucker( Sphyrapicus varius), which breeds in the temperate and boreal forests of interior North America, has not been reported previously from Alaska. However, recent observations show that it is currently a rare summer visitant and breeder in extreme east-central Alaska, and the presence of old […]
Habitat Analysis and Survey of the Yellow-bellied Sapsucker,Sphyrapicus varius, in the Southern Appalachians
Yellow-bellied Sapsucker (Sphyrapicus varius) Science Article 4 abstract The purpose of this study is to provide a habitat analysis of the Yellow-bellied Sapsucker,Sphyrapicus varius, in the Southern Appalachians. This population of S. varius is unique because it breeds in the high elevations of the Southern Appalachians, while the northern population breeds from Pennsylvania to Alberta […]
RACIAL AND SEXUAL DIFFERENCES IN MIGRATION IN SPHYRAPICUS VARIUS
Yellow-bellied Sapsucker (Sphyrapicus varius) Science Article 2 abstract The subspecies of the Yellow-bellied Sapsucker (Sphyrapicus varius) are strongly characterized not only in morphology but in migratory habits as well. General outlines of the breeding ranges and winter ranges of the four subspeciesa re given in figures 1 and 2.These illustrate the well-known facts that S. […]
Male-Female Interactions by Yellow-bellied Sapsuckers on Wintering Grounds
Yellow-bellied Sapsucker (Sphyrapicus varius) Science Article 5 abstract On 23 March 2002, in my wooded yard near Zebulon, Wake County,NC, I watched two Yellow-bellied Sapsuckers (Sphyrapicus varius), a maleand a female, engage in behavior I had never before witnessed. The malewas perched on the trunk of a small hickory (Carya sp.) having bark riddledwith sapsucker […]
Altruism in nesting Yellow-Bellied Sapsucker
Yellow-bellied Sapsucker (Sphyrapicus varius) Science Article 6 abstract Power (1975, Science 189: 142) presented the theory of altruism in describing experiments designed to test it on wild Mountain Bluebirds (Sialia currucoides). He considered his results negative, but they are pertinent to observations I presented briefly (Kilham 1971, Wilson Bull. 83: 159) but not in detail, […]
Sap tree feeding preference by Yellow-bellied Sapsuckers (Sphyrapicus varius) based ontree size and species in Cheboygan County, northern lower Michigan
Yellow-bellied Sapsucker (Sphyrapicus varius) Science Article 7 abstract To test for preference in choice of sap trees, the area surrounding an active YellowbelliedSapsucker (Sphyrapicus varius ) nest was surveyed using four randomly selected20 x 20m plots at the University of Michigan Biological Station in Cheboygan County,Michigan Amanda L. McLenon, unknown Download article download full text […]
Minimizing Yellow-Bellied Sapsucker Damage
Yellow-bellied Sapsucker (Sphyrapicus varius) Science Article 1 abstract The yellow-bellied sapsucker is a migratory woodpecker that feeds on a widevariety of orchard, shade, and forest trees. Instead of drilling holes to find insectslike other woodpeckers, sapsuckers drill holes in living trees to feed on sap andphloem tissues. Gayne G. Erdmann and Ralph M. Peterson, North […]
ORGANOCHLORINE RESIDUES AND EGGSHELL THINNING IN WOOD STORKS AND ANHINGAS
Wood Stork (Mycteria americana) Science Article 1 abstract All 10 Wood Stork eggs collected at Merritt Island National Wildlife Refuge in 1973 contained residues of DDE (geometric mean 4.0 ppm wet weight) and PCBs (1.2 ppm). Nine other organochlorines were found at lower frequencies in the eggs. Eggshells from the recent period were 8.9% thinner […]
Evidence for cryptic northern refugiaamong high- and temperate-latitude species in Beringia
Winter Wren (Troglodytes hiemalis) Science Article 3 abstract Stewart and Dalen (2008) argue that only temperate species were locked incryptic northern refugia during Pleistocene glacial cycles, while species presently found athigh latitudes had much wider distributions during glaciations. Christin L. Pruett & Kevin Winker, Climatic Change, 2007 Download article download full text (pdf)