Supplemental feeding of a wintering population of 132 white-throated
sparrows was suspended in midwinter to determine characteristics
associated with the tendency to remain within previously established home
ranges after a drop in food levels.
Site-faithful birds tended to be dominant, to have high levels of
subcutaneous fat and to reside in certain regions of the study area.
The high site-fidelity of dominant sparrows reaffirms the importance of
dominance in structuring populations.