| new feather mite species of the family pteronyssidae (astigmata: analgoidea) from south african passerines (aves: passeriformes). | four new species of feather mites belonging to three different genera of the family pteronyssidae are described from passerine birds of south africa: pteroherpus africanus sp. n. from the garden bulbul pycnonotus barbatus (desfontaines) (pycnonotidae), pteroherpus cysticolae sp. n. from the wing-snapped cisticola cisticola ayresii hartlaub (sylviidae), pteronyssoides promeropis sp. n. from the gurney's sugarbird promerops gurneyi verreaux (promeropidae), and sturnotrogus creatophorae sp. n. from ... | 2000 | 11151958 |
| sugar digestion efficiencies of gurney's sugarbirds, malachite sunbirds, and black sunbirds. | this study determined the interaction between energy assimilation and digestive constraints on the foraging behaviour of nectarivorous gurney's sugarbirds (promerops gurneyi), black sunbirds (nectarinia amethystina), and malachite sunbirds (nectarinia famosa) in the laboratory. rates of sugar intake and consumption, transit time, and the concentration of sugar in the excreta were measured when birds were fed 0.25 mol l-1 sucrose, 0.73 mol l-1 sucrose, and 0.73 mol l-1 glucose. for each species, ... | 2013 | 9231381 |