Biology ETDs

Publication Date



Timing and pattern of molts were studied in two species of Southwestern thrashers, Toxostoma curvirostre and T. bendirei. Emphasis was placed upon description of the sequence of feather replacement. Adults of both species undergo a complete molt (the prebasic) following the breeding season. The pattern of molt is essentially the same in both species. However, the migratory T. bendirei completes the molt approximately one month earlier than T. curvirostre, which remains on or near the breeding grounds throughout the year. The molts of young birds of both species are also similar in pattern. A major difference is the telescoping of two molts in young T. bendirei. Young T. curvirostre complete the prejuvenal molt before beginning the first prebasic molt.



Document Type


Degree Name


Level of Degree


Department Name

UNM Biology Department

First Committee Member (Chair)

J. David Ligon

Second Committee Member

Gordon Verle Johnson

Third Committee Member

Clifford Smeed Crawford

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Biology Commons