Quality of food source affects female visitation and display rates of male broad-tailed hummingbirds
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Published source details
Camfield A.F. (2003) Quality of food source affects female visitation and display rates of male broad-tailed hummingbirds. The Condor, 105, 603-606.
Published source details Camfield A.F. (2003) Quality of food source affects female visitation and display rates of male broad-tailed hummingbirds. The Condor, 105, 603-606.
Actions
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 randomised, replicated trial in a mixed forest and alpine meadow site in Colorado, USA, in May-August 2001 (Camfield 2003) found that female broad-tailed hummingbirds Selasphorus platycercus visited feeders more often if they contained higher sucrose concentrations (5.8 visits/hr to feeders with 30% solution vs. 4.2 visits/hr with 20% solution and 0.3 visits/hr with 10%). Sucrose solutions were provided in nine 100 ml commercially-available feeders at least 50 m apart. Feeders were randomly assigned to a sugar concentration at the beginning of the study and monitored for a one hour a day for a total of 17 days. Solutions were measured as weight-volume concentrations.
Output references
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