Current Ornithology

This edited series has three principal goals. The first is to provide information in a relatively concise way for researchers needing an over­ view of specific disciplines. The second is to provide an update on specific schools of thought, bringing together ideas from colleagues whose works often appear in a variety of journals. And the third is to stimulate and suggest directions for new research. Volume 6 continues the tradition established by the previous editor and editorial board in pr...