... assimilation efficiency and gut transit time, but not after controlling for the effect of body mass. We fed a diet of equicaloric solutions of sucrose and a 1:1 mixture of glucose and fructose (hexose mixture) solutions to Palestine sunbirds( Nectarinia osea ). When fed sucrose solutions, males had longer...

... technique was used to measure the energy cost of short flights in the nectarivorous Palestine sunbird Nectarinia osea (mean mass 6.17±0.16 g, N =8)and the non-nectarivorous starling Sturnus vulgaris (mean mass 70.11±1.11 g, N =9). The technique was initially calibrated in five individuals for each species...

... in the gastrointestinal tract of Palestine sunbirds ( Nectarinia osea )decreases with increasing water ingestion rate, we predicted that glomerular filtration rate (GFR) in these birds would not be unusually high in spite of large ingested water loads. When feeding on dilute sucrose solutions, sunbirds ingested between 4...

.... * Author for correspondence at present address: Department of Wildlife Ecology,University of Wisconsin, Madison, WI 53706, USA (e-mail: [email protected] ) 18 11 2002 © The Company of Biologists Limited 2003 2003 Palestine sunbird Nectarinia osea hummingbird adaptive...