Orientador: Luiz Octavio Marcondes Machado / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia / Made available in DSpace on 2018-07-15T03:05:52Z (GMT). No. of bitstreams: 1 Oliveira_MariaMarthaArgelde_M.pdf: 7910087 bytes, checksum: e26a7f6ee927a4f003e1fee492d7f0dd (MD5) Previous issue date: 1989 / Resumo: O sabiá-do-campo (Mimus saturninus) foi estudado em várias localidade do estado de São Paulo, entre agosto de 1993 e janeiro de 1986, sendo dada atenção à alimentação, reprodução, repertório vocal e reação frente a aves de outras espécies. A espécie é onívora e alimenta-se principalmente de insetos (grupos de maior importância: Isoptera, Coleoptera, Formicidae) e de frutos (principalmente silvestres, diâmetro inferior a 1 cm). À variada dieta corresponde ampla gama de técnicas de forrageiro (as mais utilizadas: ¿captura no terreno, durante deslocamento¿ e ¿captura de presas altas em vôo, partindo de poleiro¿). A reprodução ocorre entre final de agosto e janeiro. São feitas até quatro posturas, com 3 ou 4 ovos cada. Ocorre a interferência de ¿adjudantes¿ (¿helpers¿), indivíduos que não fazem parte do casal em reprodução, durante a construção da ninho e durante a alimentação de ninhegos e filhotes, mas não durante a incubação. ...Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital / Abstract: The Chalk-browed Mockingbird (Mimus saturninus, Mimidae) was studied in some lacalites in the State of São Paulo (Brazil) from August 1983 to January 1986. special attention was paid to diet composition, feeding behaviour, potential as seed disperser, breeding biology, wing-flashing behaviour, vocal repertory and reaction to other species. M saturninus is omnivorous, feeding mainly on insects (most important groups: Isoptera, Coleoptera, Formicidae) and fruits (mainly wild, brightly coloured and with diameter inferior to 1 cm). The diet also includes, although infrequently, terrestrial Gastropoda, Oligochaeta, Araneida, nectar and flowers petals. To the varied diet corresponds a wide gamma of foraging technics. The most utilized for animal preys are ¿capturing of preys on the ground during motion¿ and ¿capturing of flying preys on wing, departing from perch¿. Small to medium fruits are generally swallowed whole and the seeds eliminated via faeces. The species must be regarded as a potential seed disperser: 10 out of 19 seed species found in faeces were succesful in germinating. Reproduction occurs from late August to January. Nests are open cups constructed with twigs, sometimes thorny, and grass stalks, lined with thin rootlests and other fine materials, and are placed most frequently in shrubs, eventually in tress (average height of nest 1,22 m). Up to 4 clutches are laid each season, with 3 ¿ 4 eggs each. Nestling remain in nest 13 ¿ 14 days and fledglings are still being feed by adults about one month after leaving the nest. Helpers often interfere during nest bulding and feeding of young, but not during icubation. ¿Note: The complete abstract is available with the full electronic digital thesis or dissertations / Mestrado / Ecologia / Mestre em Ciências Biológicas