\nwww.bioone.org
\nKenneth D. Meyer, Steven M. McGehee, and Michael W. Collopy
\nDepartment of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL 32611<\/p>\n
We studied the diets of nesting Swallow-tailed Kites (Elanoides forficatus) at eight nests in 1988\u20131989 in southern Florida, where the species reaches its greatest abundance in the United States. Males fed females during the incubation stage an average of 2.1 \u00b1 0.8 times per day. The adults averaged 10.9 \u00b1 4.5 deliveries daily during the nestling stage, and 10.3 \u00b1 12.5 deliveries to young daily following nest departure.
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Vertebrates comprised 97% of the biomass for the 1092 identifiable prey items delivered to nests. Frogs accounted for 56%, birds 30%, and reptiles 11% of all prey. Numerically, frogs made up 83% of the reptile and amphibian prey. The relative proportions of prey types varied substantially among nests within years, and significantly more snakes and insects were delivered in 1989. Total biomass delivered in 1988 did not differ from that in 1989. Bird biomass, however, was greater in 1988 and insect biomass was greater in 1989. Anoles and snakes were brought to nests in larger numbers during the morning and evening hours; and birds were delivered mainly from midmorning to midafternoon.<\/p>\n
Entregas de Alimentos en Nidos de Elanoides forficatus en el Sur de Florida<\/p>\n
Resumen.Durante 1988 y 1989 estudiamos la dieta de los polluelos de Elanoides forficatus en ocho nidos localizados en el sur de la Florida, donde la especie alcanza su mayor abundancia de nidificacion dentro de los Estados Unidos. Durante la incubaci\u00f3n, los machos alimentaron a las hembras un promedio de 2.1 \u00b1 0.8 veces por d\u00eda. Durante la etapa de polluelos, los adultos hicieron un promedio de 10.9 \u00b1 4.5 entregas diarias y un promedio de 10.3 \u00b1 12.5 entregas diarias despu\u00e9s de abandonar el nido. Los vertebrados comprendieron el 97% de la biomasa de las 1092 presas identificables entregadas en los nidos. Las ranas constituyeron el 56%, las aves el 30% y los reptiles el 11% del total de las presas. Num\u00e9ricamente, las ranas constituyeron el 83% de la herpetofauna depredada. Las proporciones relativas de los tipos de presa variaron substancialmente entre los nidos a trav\u00e9s de los a\u00f1os, y considerablemente m\u00e1s serpientes e insectos fueron entregados en 1989. La biomasa total entregada durante 1988 no difiri\u00f3 de la observada en 1989. Sin embargo, la biomasa de las aves fue mayor en 1988, mientras que la de los insectos fue mayor en 1989. Las lagartijas y serpientes fueron entregadas a los nidos en mayor cantidad durante las horas de la ma\u00f1ana y de la tarde, mientras que las aves fueron entregadas principalmente desde la mitad de la ma\u00f1ana hasta la mitad de la tarde.<\/p>\n","protected":false},"excerpt":{"rendered":"
www.bioone.org Kenneth D. Meyer, Steven M. McGehee, and Michael W. Collopy Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL 32611 We studied the diets of nesting Swallow-tailed Kites (Elanoides forficatus) at eight nests in 1988\u20131989 in southern Florida, where the species reaches its greatest abundance in the United States. Males fed females […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[413],"tags":[],"yoast_head":"\n