Sexual dimorphism has been noted to exist in many genera of birds, but it is not until recently that papers have appeared which deal with the actual extent of sexual dimorphism and its possible adaptive significance. The papers of Rand (1952), Sibley (1957), Amadon (1959), and Selander (1966) hypothesize about the possible significance of sexual dimorphism in birds, and the papers of Kilham (1965), Selander (1965), Storer (1966), Ligon(1968), Ingolfsson (1969), and Verner and Willson (1969) examine the relationship between hypotheses on the significance of sexual dimorphism and actual field conditions. None of these papers deals with differences in bone or muscle ratios which may exist between the sexes. A paper by Engels (1938a) on variation in bone length and limb proportion in the coot does examine differences in bone length and limb proportions due to sex, but only in a very cursory manner.
It appears that only the most obvious and well known sexually dimorphic birds, i.e. woodpeckers, birds-of-paradise, accipitrines, have been studied. In this paper my purpose is to ascertain osteological and myological differences between the sexes of a bird which does not have a great deal of apparent sexual dimorphism - Sturnella neglecta neglecta Audubon, A.O.U. 501.1.
","abstract_html":"<p>Sexual dimorphism has been noted to exist in many genera of birds, but it is not until recently that papers have appeared which deal with the actual extent of sexual dimorphism and its possible adaptive significance. The papers of Rand (1952), Sibley (1957), Amadon (1959), and Selander (1966) hypothesize about the possible significance of sexual dimorphism in birds, and the papers of Kilham (1965), Selander (1965), Storer (1966), Ligon(1968), Ingolfsson (1969), and Verner and Willson (1969) examine the relationship between hypotheses on the significance of sexual dimorphism and actual field conditions. None of these papers deals with differences in bone or muscle ratios which may exist between the sexes. A paper by Engels (1938a) on variation in bone length and limb proportion in the coot does examine differences in bone length and limb proportions due to sex, but only in a very cursory manner.</p><p>It appears that only the most obvious and well known sexually dimorphic birds, i.e. woodpeckers, birds-of-paradise, accipitrines, have been studied. In this paper my purpose is to ascertain osteological and myological differences between the sexes of a bird which does not have a great deal of apparent sexual dimorphism - Sturnella neglecta neglecta Audubon, A.O.U. 501.1.</p>","abstract_has_math":false,"creators":["Sourisseau, Thomas Felix, Jr."],"institution":null,"degree_name":"Master of Science (M.S.)","degree_level":"Thesis","degree_discipline":"Biological Sciences","degree_department":null,"school":null,"contributors":["Lee Christianson"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1970,"date_issued":"1970-01-01T08:00:00Z","date_published":"1970-01-01T08:00:00Z","updated_at":"2026-07-24T05:37:34Z","subjects":["Meadowlarks","Birds Anatomy","Bones","Biology","Life Sciences"],"languages":[],"rights":[],"rights_urls":["http://rightsstatements.org/vocab/NKC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"https://scholarlycommons.pacific.edu/uop_etds/1704","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Lee Christianson"]},{"key":"dc:creator","label":"Author","values":["Sourisseau, Thomas Felix, Jr."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["1970-01-01T08:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Biological Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (M.S.)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Meadowlarks","Birds Anatomy","Bones","Biology","Life Sciences"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["http://rightsstatements.org/vocab/NKC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarlycommons.pacific.edu/uop_etds/1704"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Sexual dimorphism has been noted to exist in many genera of birds, but it is not until recently that papers have appeared which deal with the actual extent of sexual dimorphism and its possible adaptive significance. The papers of Rand (1952), Sibley (1957), Amadon (1959), and Selander (1966) hypothesize about the possible significance of sexual dimorphism in birds, and the papers of Kilham (1965), Selander (1965), Storer (1966), Ligon(1968), Ingolfsson (1969), and Verner and Willson (1969) examine the relationship between hypotheses on the significance of sexual dimorphism and actual field conditions. None of these papers deals with differences in bone or muscle ratios which may exist between the sexes. A paper by Engels (1938a) on variation in bone length and limb proportion in the coot does examine differences in bone length and limb proportions due to sex, but only in a very cursory manner.
It appears that only the most obvious and well known sexually dimorphic birds, i.e. woodpeckers, birds-of-paradise, accipitrines, have been studied. In this paper my purpose is to ascertain osteological and myological differences between the sexes of a bird which does not have a great deal of apparent sexual dimorphism - Sturnella neglecta neglecta Audubon, A.O.U. 501.1.
"]},{"key":"dc:source","label":"Dc Source","values":["115"]},{"key":"dc:title","label":"Title","values":["A myological and osteological comparison of the pelvic appendage of the male and female western meadowlark"]}]}],"canonical_facts":{"dc:contributor":["Lee Christianson"],"dc:creator":["Sourisseau, Thomas Felix, Jr."],"dc:date.available":["1970-01-01T08:00:00Z"],"dc:description.abstract":["Sexual dimorphism has been noted to exist in many genera of birds, but it is not until recently that papers have appeared which deal with the actual extent of sexual dimorphism and its possible adaptive significance. The papers of Rand (1952), Sibley (1957), Amadon (1959), and Selander (1966) hypothesize about the possible significance of sexual dimorphism in birds, and the papers of Kilham (1965), Selander (1965), Storer (1966), Ligon(1968), Ingolfsson (1969), and Verner and Willson (1969) examine the relationship between hypotheses on the significance of sexual dimorphism and actual field conditions. None of these papers deals with differences in bone or muscle ratios which may exist between the sexes. A paper by Engels (1938a) on variation in bone length and limb proportion in the coot does examine differences in bone length and limb proportions due to sex, but only in a very cursory manner.
It appears that only the most obvious and well known sexually dimorphic birds, i.e. woodpeckers, birds-of-paradise, accipitrines, have been studied. In this paper my purpose is to ascertain osteological and myological differences between the sexes of a bird which does not have a great deal of apparent sexual dimorphism - Sturnella neglecta neglecta Audubon, A.O.U. 501.1.
"],"dc:identifier":["https://scholarlycommons.pacific.edu/uop_etds/1704"],"dc:rights":["http://rightsstatements.org/vocab/NKC/1.0/"],"dc:source":["115"],"dc:subject":["Meadowlarks","Birds Anatomy","Bones","Biology","Life Sciences"],"dc:title":["A myological and osteological comparison of the pelvic appendage of the male and female western meadowlark"],"thesis:degree_discipline":["Biological Sciences"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science (M.S.)"]},"updated_at":"2026-07-24T05:37:34Z"}