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Documents disponibles écrits par cet auteur (6)
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Article
Elizabeth C. MacDonald, Auteur ; Alaine F. Camfield, Auteur ; Michaela Martin, Auteur ; Scott Wilson, Auteur ; Kathy Martin, AuteurWe examined timing of breeding, nest site selection and nest survival of Horned Larks (Eremophila alpestris), Savannah Sparrows (Passerculus sandwichensis) and American Pipits (Anthus rubescens) in an alpine habitat on Hudson Bay Mountain, BC, C[...]
Article
Elizabeth C. MacDonald, Auteur ; Alaine F. Camfield, Auteur ; Michaela Martin, Auteur ; Scott Wilson, Auteur ; Kathy Martin, AuteurWe examined timing of breeding, nest site selection and nest survival of Horned Larks (Eremophila alpestris), Savannah Sparrows (Passerculus sandwichensis) and American Pipits (Anthus rubescens) in an alpine habitat on Hudson Bay Mountain, BC, C[...]
Article
Michaela Martin, Auteur ; Alaine F. Camfield, Auteur ; Kathy Martin, AuteurAlthough Savannah Sparrows (Passerculus sandwichensis) have been well studied across their North American range, few data are available for populations that breed in high-elevation habitats. We collected data over six years on the demography of [...]
Article
Elizabeth C. MacDonald, Auteur ; Alaine F. Camfield, Auteur ; Jill E. Jankowski, Auteur ; Kathy Martin, AuteurIncubating birds can incur high energetic costs and, when faced with a trade-off between incubation and foraging, parents may neglect their eggs in favor of their own somatic needs. Extended incubation recesses are an example of neglect, but the[...]
Article
Alaine F. Camfield, Auteur ; Scott F. Pearson, Auteur ; Kathy Martin, AuteurEnvironmental variation along elevational gradients can strongly influence life history strategies in vertebrates. We investigated variation in life history patterns between a horned lark subspecies nesting in high elevation alpine habitat Eremo[...]
Article
Territorial behavior of Broad-tailed (Selasphorous platycercus) and Rufous (Selasphorous rufus) hummingbirds in Colorado was measured at sites with feeders containing10%, 20%, and 30% sucrose solutions, respectively. The presence or absence of t[...]
