Date of Award:

5-1967

Document Type:

Dissertation

Degree Name:

Doctor of Philosophy (PhD)

Department:

Biology

Department name when degree awarded

Wildlife Biology

Committee Chair(s)

Jessop B. Low

Committee

Jessop B. Low

Committee

Frederic H. Wagner

Committee

William T. Helm

Committee

Keith L. Dixon

Committee

Arthur H. Holmgren

Abstract

The black-bellied tree duck (Dendracygna autumnal is) 1 is one of eight tree ducks (whistling ducks) in the genus Dendracygna . This group shares enough characteris tics--reticulated tarsus and symmetrical syrinx structure, among others--with the swans and geese Ia warrant a cam man subfamily, Anserinae of the waterfowl family Anatidae. De Iacour and Mayr ( 1945) make a tribal distinction, however, between the tree ducks (Dendracygnini) and the swans and geese (Anserini) based, in part, an differences in size, vertebrae number, and downy plumage . These same authors remark that the tree ducks are the leas t known of the waterfowl largely because there are no life history studies for any of the species. Of the two species found in the continental United States, the fulvous (_Q . bicolor) and black-bellied tree ducks , the ecology of the last named seemed singularly unknown.

Checksum

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