Recently added articles from The Wilson Journal of Ornithology:
Distribution, plumage, and conservation status of the endemic Esmeraldas Woodstar (Chaetocercus berlepschi) of Western Ecuador.
Jun 01, 2009; ... Chaetocercus (Trochilidae) is presently considered to comprise six species (C. mulsant, White-bellied Woodstar; C. bombus, Little Woodstar; C. heliodor, Gorgeted Woodstar; C. astreans, Santa Marta Woodstar; C. berlepschi, Esmeraldas Woodstar; and C. jourdanii, Rufous-shafted Woodstar) ...
Preventing bird-window collisions.
Jun 01, 2009; ... Avian mortality resulting from collisions with clear and reflective sheet glass and plastic is estimated to be in the billions worldwide (Klem 1990, 2006). Collisions are predicted and expected wherever birds and windows coexist (Klem 1989, 1990, 2006). Birds behave as if windows are ...
Effects of supplemental food and experience on winter survival of transplanted Wild Turkeys.
Jun 01, 2009; ... Historically, the northern range of Wild Turkeys (Meleagris gallopavo) fluctuated with winter severity (Leopold 1931, Schorger 1942, Mosby 1959). The ancestral range has been extended in Minnesota by transplanting wild-trapped turkeys in response to stakeholder interests for greater ...
Parental investment theory and nest defense by Eastern Kingbirds.(Report)
Mar 01, 2009; ... Parental defense of young is a fundamental aspect of behavior common to most vertebrates (Clutton-Brock 1991); attempts to explain why intensity of defense varies both among and within species have drawn heavily from parental investment (PI) theory (Trivers 1972, Montgomerie and ...
Site fidelity, mate fidelity, and breeding dispersal in American Kestrels.(Report)
Mar 01, 2009; ... Dispersal behavior is important as it may affect the abundance, distribution, and genetic composition of animal populations (Greenwood 1980, Clobert et al. 2001). It is thought that animals change nest locations and mates to improve their future reproductive success (Greenwood 1980). Most ...
Evaluating avian community dynamics in restored riparian habitats with mark-recapture models.(Report)
Mar 01, 2009; ... Community attributes such as species richness, rates of local extinction and colonization, and community turnover are often used as metrics to evaluate the condition of natural systems (Nichols et al. 1998, McCoy and Mushinsky 2002). Community dynamics can be useful for examining ...
Relative abundance, habitat use, and long-term population changes of wintering and resident landbirds on St. John, U.S. Virgin Islands.(Report)
Mar 01, 2009; ... Populations of both migratory and resident species of West Indian birds have been affected by humans through land-use changes, introduced mammals, and direct hunting since the islands were first settled several thousand years ago (Pregill et al. 1994). Habitat loss may be the most ...
Avifauna of the Pongos Basin, Amazonas Department, Peru.(Report)
Mar 01, 2009; ... A distinctive feature of the Peruvian Andes is the frequent presence of 'pongos', or water gaps, which are transverse openings in mountain ridges caused by tectonic activity. In some instances, rivers cut through sufficiently high uplifted areas to create valleys of considerable amplitude ....
Relationship between species richness of excavator birds and cavity-adopters in seven tropical forests in Costa Rica.(Report)
Mar 01, 2009; ... Bird nests vary greatly in shape and construction (Baicich and Harrison 1997, Collias 1997, Sheldon and Winkler 1999), including cavity nests (Skutch 1976; Eberhard 1998, 2002). Among cavity nesters, some bird species nest in clay or sand cavities (e.g., bee-eaters, motmots, jacamars, ...
Detection probabilities of woodpecker nests in mixed conifer forests in Oregon.(Report)
Mar 01, 2009; ... The importance of estimating probabilities of detection for individuals, species, or age classes has been noted by many authors (Nichols 1992, Buckland et al. 2001, Williams et al. 2001, MacKenzie et al. 2006), and computer programs are available for estimating detection probabilities for ...
Nest niche partitioning of Lewis's and Red-headed woodpeckers in burned pine forests.(Report)
Mar 01, 2009; ... The coexistence of ecologically equivalent species is unlikely; mechanisms that allow for coexistence include habitat partitioning, use of resources during different times (i.e., temporal partitioning), and/or differential use of food (Schoener 1974, Anderson et al. 2002). Habitat ...
Effects of weather and habitat on foraging behavior of non-breeding Eastern Phoebes.(Report)
Mar 01, 2009; ... Ambient temperature and short-term meteorological variations influence foraging behavior of many avian groups by affecting thermoregulation and activity of flying insects (Taylor 1963, Kingsolver 1983). Swallows (Hirundinidae), swifts (Apodidae), and flycatchers (Tyrannidae, Muscicapidae) ...
Characteristics of foraging perch-sites used by Loggerhead Shrikes.(Report)
Mar 01, 2009; ... Declines in grassland birds are often associated with habitat loss from the conversion of natural grasslands or low-intensity agriculture to other land uses, typically intensified agriculture (Vickery et al. 2001, Wilson et al. 2005, Buckingham et al. 2006). One adverse affect on bird ...
A fifteen-year study of fall stopover patterns of Catharus thrushes at an inland, urban site.(Report)
Mar 01, 2009; ... There are no published long-term studies of stopover ecology of migrant birds in urban natural areas, even as birds are increasingly encountering such sites during migration. Habitat lost to urbanization is typically more dissimilar to natural habitat than that lost to agriculture or ...
Winter site fidelity and over-winter site persistence of passerines in Florida.(Report)
Mar 01, 2009; ... Winter biology of migratory birds has received attention because conditions in the non-breeding season have been shown to limit populations (Rappole and McDonald 1994, Sherry and Holmes 1996). Factors influencing a bird's ability to survive the winter and reproduce the following spring are ...
Architectural and landscape risk factors associated with bird-glass collisions in an urban environment.(Report)
Mar 01, 2009; ... Growing evidence supports the interpretation that, except for habitat destruction, collisions with clear and reflective sheet glass cause the deaths of more birds than any other human-related avian mortality factor (Klem 1989, 1990b, 2006; Erickson et al. 2001; Manville 2005, 2008). The ...
Association of Northern Bobwhites with surface water in the semi-arid Texas Panhandle.(Report)
Mar 01, 2009; ... The necessity of surface water to Northern Bobwhite (Colinus virginianus) survival and reproduction, especially in arid and semi-arid regions, is poorly understood. Grinnell (1927) believed that quail in the southwestern United States selected nest sites within walking distance to water; ...
Wing morphology varies with age but not migratory habit in American Dippers.(Report)
Mar 01, 2009; ... Migration can impose strong selection pressure on traits that influence speed and efficiency of long-distance flight, and may have a major role in maintaining inter- and intra-specific variation in wing morphology (Alerstam and Lindstrom 1990, Alerstam 1991). Aerodynamic theory suggests ...
Observations of molt in an endangered Rallid, the Hawaiian Moorhen.(Short Communications)(Report)
Mar 01, 2009; ... Understanding avian molt patterns is important because birds require significant energetic and protein resources to produce the new plumage (Panek and Majewski 1990, Earnst 1992, Murphy and King 1992, Bonier et al. 2007). Birds experience decreased flight performance during replacement of ...
Habitat associations and nests of Band-tailed Antbirds (Hypocnemoides maculicauda) in the Brazilian Pantanal.(Short Communications)(Report)
Mar 01, 2009; ... Habitat associations of many neotropical birds are poorly known and the two species in the genus Hypocnemoides, Band-tailed Antbird (H. maculicauda) and Black-chinned Antbird (H. melanopogon), are no exception. The range of Band-tailed Antbirds, although largely confined to the southern ...