Field studies of rufous hummingbird sucrose preference: does source height affect test results?
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Published source details
Blem C.R., Blem L.B. & Cosgrove C.C. (1997) Field studies of rufous hummingbird sucrose preference: does source height affect test results?. Journal of Field Ornithology, 68, 245-252.
Published source details Blem C.R., Blem L.B. & Cosgrove C.C. (1997) Field studies of rufous hummingbird sucrose preference: does source height affect test results?. Journal of Field Ornithology, 68, 245-252.
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This study is summarised as evidence for the following.
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Provide supplementary food for hummingbirds to increase adult survival Action Link |
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Provide supplementary food for hummingbirds to increase adult survival
A replicated study in a coniferous forest in Montana, USA, in summer 1995 (Blem et al. 1997) found that rufous hummingbirds Selasphorous rufus preferentially visited feeders containing higher concentrations of sucrose, until 50% sucrose by weight, above which they did not show a preference. They also appeared to preferentially use more highly elevated feeders (approximately 80% of the maximum sucrose consumed was taken from feeders 3 m from the ground vs. a maximum of 55% from feeders hung 2.75 m or less from the ground). Food was supplied at seven stations, each with 12 feeders hung at between 0.25 and 3.00 m from the ground.
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