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 […]
Category: Piciformes
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, […]
Sexual differences in physical condition in the White-backed Woodpecker Dendrocopos leucotos
White-backed Woodpecker (Dendrocopos leucotos) Science Article 1 abstract Body-mass and wing-length of adultWhite-backedWoodpeckers Dendrocopos leucotos were measured in 57 males and 55 females in Surnadal community in western Norway during November-June from 1985 to 2001. The mean physical condition (ratio bodymass : wing length) of reproducing females in coastal areas was better than of females […]
NOTES ON THE SWALLOW-WING, CHELIDOPTERA TENEBROSA, IN SURINAM
Swallow-winged Puffbird (Chelidoptera tenebrosa) Science Article 1 abstract Recently Skutch (Wilson Bull., 60, 1948:81-97) published an important article on the life history of certain puff-birds in which the Swallow-wing (Ckelidopteru tenebrosa, family Bucconidae) is mentioned briefly. As this is a common bird in Surinam, Dutch Guiana, the following supplementary notes may be of interest. F. […]
Relationship of Veniliornis Cassini Chocoensis and V. Cassini Caquetanus with V. Affinis
Red-stained Woodpecker (Veniliornis affinis) Science Article 1 abstract In reviewing species of the genus Veniliornis for a forthcoming book on the world’s woodpeckers I was able to reevaluate the status of Veniliornis chocoensis Todd (1919, Proc. Biol. Soc. Washington3 2: 116; chocoensis is treated universally as a race of V. cassini) and of V. cassinic […]
Nest-site selection and niche partitioning among the Great Spotted Woodpecker Dendrocopos major and Middle Spotted Woodpecker Dendrocopos medius in riverine forest of Central Europe
Middle Spotted Woodpecker (Dendrocopos medius) Science Article 2 abstract We studied nest-site selection of the Great- and Middle Spotted Woodpecker inhabiting the riverine forest remnants of Central Poland. In addition to nest tree characteristics and location in relation to edge proximity, a comparison between nesting and random sites within the woodpeckers’ territories allowed a study […]
Breeding performance of the middle spotted woodpecker Dendrocopos medius in relation to weather and territory quality
Middle Spotted Woodpecker (Dendrocopos medius) Science Article 5 abstract Reproductive success in birds is influenced by a variety of factors, many of which can be attributed to human activities such as land use or forest management. Others like weather or age of the birds are not under human control but are influential as well. From […]
Characteristics of trees preferred by foraging Middle Spotted Woodpecker Dendrocopos medius in northern Switzerland
Middle Spotted Woodpecker (Dendrocopos medius) Science Article 4 abstract The endangered Middle Spotted Woodpecker Dendrocopos medius is restricted to oak forests. We analysed this woodpecker’s foraging trees and behaviour in a coppice-with-standards wood in the Swiss lowlands. Oaks Quercus spp. were highly preferred and their diameter at breast height mainly ranged from 36-72 cm, corresponding […]