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 d

Our purposes in this preface are, first, to reiterate our view of Current Ornithology's role; second, to describe briefly the contents of this vol ume; and thir

Volume 5 of this series continues its coverage of currently active re search fields in ornithology. Because an editor can never be a disin terested observer of