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Holly B Ernest - One of the best experts on this subject based on the ideXlab platform.
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on the origin of the galapagos hawk an examination of phenotypic differentiation and mitochondrial paraphyly
Biological Journal of The Linnean Society, 2008Co-Authors: Joshua M Hull, Wesley K Savage, Jennifer L Bollmer, Rebecca T Kimball, Patricia G Parker, Noah K Whiteman, Holly B ErnestAbstract:Previous phylogenetic hypotheses suggest a sister group relationship between mainland and widespread Buteo swainsoni (Swainson’s hawk) and the island archipelago taxon Buteo galapagoensis (Galapagos hawk). We further describe phylogenetic relationships of this clade using molecular data from the mitochondrial control region, and consider the role of niche expansion on phenotype using morphological data from B. galapagoensis, B. swainsoni, and related Buteo jamaicensis (red-tailed hawk). Among 52 unique Buteo haplotypes, phylogenetic analyses support a monophyletic B. galapagoensis clade within a clade of B. swainsoni haplotypes, rendering B. swainsoni paraphyletic with respect to B. galapagoensis. Mitochondrial paraphyly is likely a result of incomplete lineage sorting subsequent to a recent colonization event and exemplifies speciation of peripheral population isolates. Morphological comparisons indicate that metrics associated with prey capture differ significantly between B. galapagoensis and B. swainsoni, but are similar between B. galapagoensis and B. jamaicensis. These results suggest directional selection on B. galapagoensis morphology associated with feeding, possibly an outcome of decreased interspecific competition and change towards a more generalist diet shared by B. jamaicensis. In the B. galapagoensis lineage, our results suggest that genetic drift influences the neutral mitochondrial marker, whereas selection may have driven phenotypic character change. © 2008 The Linnean Society of London, Biological Journal of the Linnean Society, 2008, 95, 779‐789.
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hybridization among Buteos swainson s hawks Buteo swainsoni x red tailed hawks Buteo jamaicensis
The Wilson Journal of Ornithology, 2007Co-Authors: Joshua M Hull, Jeff P Smith, Nicola Murphy, Lindsay Cullen, Adam C Hutchins, Wesley K Savage, Holly B ErnestAbstract:Abstract We report three cases of hybridization between wild Swainson's Hawks (Buteo swainsoni) and Red-tailed Hawks (B. jamaicensis) identified by using nuclear and mitochondrial DNA markers. The hybrid individuals were field-identified as Swainson's Hawks and sampled from Alberta, Canada (n = 2) and Utah, USA (n = 1). Nineteen nuclear microsatellite loci were used in a factorial correspondence analysis to create genotypic clusters of 468 Red-tailed and 357 Swainson's hawks. Three suspected hybrids were identified by an intermediate genetic position between the genotypic clusters of the two species, indicating a hybridogenetic composition. We examined mitochondrial control region sequence data to identify the maternal background of the putative hybrids; two of the hybrid specimens had Red-tailed Hawk mtDNA haplotypes and the third a Swainson's Hawk haplotype. These results suggest that hybridization between these two species may occur in their shared breeding range and can result in reciprocal hybrid off...
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development of 19 microsatellite loci for swainson s hawks Buteo swainsoni and other Buteos
Molecular Ecology Notes, 2007Co-Authors: Joshua M Hull, Rick J Topinka, Danielle Tufts, Holly B ErnestAbstract:We developed 26 Swainson’s hawk (Buteo swainsoni) microsatellite primers from CA, AAT, CATC and GAGAA enriched genomic libraries. Primers were tested in 357 Swainson’s hawks from western North America as well as seven other Buteo species. These markers will have broad application in investigations of Buteo population structure and genetic diversity.
Joshua M Hull - One of the best experts on this subject based on the ideXlab platform.
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on the origin of the galapagos hawk an examination of phenotypic differentiation and mitochondrial paraphyly
Biological Journal of The Linnean Society, 2008Co-Authors: Joshua M Hull, Wesley K Savage, Jennifer L Bollmer, Rebecca T Kimball, Patricia G Parker, Noah K Whiteman, Holly B ErnestAbstract:Previous phylogenetic hypotheses suggest a sister group relationship between mainland and widespread Buteo swainsoni (Swainson’s hawk) and the island archipelago taxon Buteo galapagoensis (Galapagos hawk). We further describe phylogenetic relationships of this clade using molecular data from the mitochondrial control region, and consider the role of niche expansion on phenotype using morphological data from B. galapagoensis, B. swainsoni, and related Buteo jamaicensis (red-tailed hawk). Among 52 unique Buteo haplotypes, phylogenetic analyses support a monophyletic B. galapagoensis clade within a clade of B. swainsoni haplotypes, rendering B. swainsoni paraphyletic with respect to B. galapagoensis. Mitochondrial paraphyly is likely a result of incomplete lineage sorting subsequent to a recent colonization event and exemplifies speciation of peripheral population isolates. Morphological comparisons indicate that metrics associated with prey capture differ significantly between B. galapagoensis and B. swainsoni, but are similar between B. galapagoensis and B. jamaicensis. These results suggest directional selection on B. galapagoensis morphology associated with feeding, possibly an outcome of decreased interspecific competition and change towards a more generalist diet shared by B. jamaicensis. In the B. galapagoensis lineage, our results suggest that genetic drift influences the neutral mitochondrial marker, whereas selection may have driven phenotypic character change. © 2008 The Linnean Society of London, Biological Journal of the Linnean Society, 2008, 95, 779‐789.
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hybridization among Buteos swainson s hawks Buteo swainsoni x red tailed hawks Buteo jamaicensis
The Wilson Journal of Ornithology, 2007Co-Authors: Joshua M Hull, Jeff P Smith, Nicola Murphy, Lindsay Cullen, Adam C Hutchins, Wesley K Savage, Holly B ErnestAbstract:Abstract We report three cases of hybridization between wild Swainson's Hawks (Buteo swainsoni) and Red-tailed Hawks (B. jamaicensis) identified by using nuclear and mitochondrial DNA markers. The hybrid individuals were field-identified as Swainson's Hawks and sampled from Alberta, Canada (n = 2) and Utah, USA (n = 1). Nineteen nuclear microsatellite loci were used in a factorial correspondence analysis to create genotypic clusters of 468 Red-tailed and 357 Swainson's hawks. Three suspected hybrids were identified by an intermediate genetic position between the genotypic clusters of the two species, indicating a hybridogenetic composition. We examined mitochondrial control region sequence data to identify the maternal background of the putative hybrids; two of the hybrid specimens had Red-tailed Hawk mtDNA haplotypes and the third a Swainson's Hawk haplotype. These results suggest that hybridization between these two species may occur in their shared breeding range and can result in reciprocal hybrid off...
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development of 19 microsatellite loci for swainson s hawks Buteo swainsoni and other Buteos
Molecular Ecology Notes, 2007Co-Authors: Joshua M Hull, Rick J Topinka, Danielle Tufts, Holly B ErnestAbstract:We developed 26 Swainson’s hawk (Buteo swainsoni) microsatellite primers from CA, AAT, CATC and GAGAA enriched genomic libraries. Primers were tested in 357 Swainson’s hawks from western North America as well as seven other Buteo species. These markers will have broad application in investigations of Buteo population structure and genetic diversity.
Robert E. Kenward - One of the best experts on this subject based on the ideXlab platform.
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movements of radio tagged buzzards Buteo Buteo in early life
Ibis, 2008Co-Authors: Sean S. Walls, Robert E. KenwardAbstract:Radio-tags were used to track 146 Buzzards Buteo Buteo during 1990-1996. Each bird was tracked for up to 4 years; of 74 tags fitted since 1992, 72% lasted 3 years. Among the 87 Buzzards tracked for more than one year, 46% settled after one dispersal movement, 37% dispersed and then changed their ranges, 17% did not disperse and one Buzzard alternated between a summer and a winter range. Natal dispersal occurred in two waves, one in the first autumn and the second in the following spring. Initial dispersal distances in the autumn were significantly greater than those in the spring. For 73 Buzzards that dispersed in their first autumn, 96% settled within 100 km of their nest, and their distances were similar to 76 ringing recoveries. After their second spring, Buzzards rarely changed ranges and were significantly more often to the east than the west, especially those that had dispersed more than 20 km. Buzzards that had dispersed furthest were most likely to be detected returning towards their natal area in spring, and returned earlier as they got older. However, none were detected returning once they had started to breed. Nine early breeders were significantly farther from their natal nests than 44 non-breeders.
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Movements of radio‐tagged Buzzards Buteo Buteo in early life
Ibis, 2008Co-Authors: Sean S. Walls, Robert E. KenwardAbstract:Radio-tags were used to track 146 Buzzards Buteo Buteo during 1990-1996. Each bird was tracked for up to 4 years; of 74 tags fitted since 1992, 72% lasted 3 years. Among the 87 Buzzards tracked for more than one year, 46% settled after one dispersal movement, 37% dispersed and then changed their ranges, 17% did not disperse and one Buzzard alternated between a summer and a winter range. Natal dispersal occurred in two waves, one in the first autumn and the second in the following spring. Initial dispersal distances in the autumn were significantly greater than those in the spring. For 73 Buzzards that dispersed in their first autumn, 96% settled within 100 km of their nest, and their distances were similar to 76 ringing recoveries. After their second spring, Buzzards rarely changed ranges and were significantly more often to the east than the west, especially those that had dispersed more than 20 km. Buzzards that had dispersed furthest were most likely to be detected returning towards their natal area in spring, and returned earlier as they got older. However, none were detected returning once they had started to breed. Nine early breeders were significantly farther from their natal nests than 44 non-breeders.
José Antonio - One of the best experts on this subject based on the ideXlab platform.
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Salida de campo al Sotillo (Valladolid) el 15 de diciembre de 1952
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Salida de campo al Sotillo (en Valladolid capital o en sus cercanías) el 15 de diciembre de 1952, de la que se anotaron observaciones sobre las siguientes aves: Accipiter nisus (Gavilán común, también llamado Astur palumbarius por el autor), Buteo Buteo (Busardo ratonero, también llamado Águila ratera), Carduelis carduelis (Jilguero), Columba palumbus (Paloma torcaz), Falco tinnunculus (Cernícalo vulgar), Fringilla montifringilla (Pinzón real), Fringilla sp. (Pinzón), Gallinula chloropus (Gallineta común), Larus sp. (Gaviota), Motacilla alba (Lavandera blanca), Picus viridis (Pito real), Serinus sp. (probablementem, el Verdecillo, S.serinus), Troglodytes troglodytes (Chochín), Turdus merula (Mirlo común) y Vanellus vanellus (Avefría europea).Field trip to the Sotillo (in the city of Valladolid or its outskirts) the 15th of December of 1952, of which there were noted observations about the following birds: Accipiter nisus (Eurasian Sparrowhawk, also refered as Astur palumbarius by the author), Buteo Buteo (Common Buzzard), Carduelis carduelis (European Goldfinch), Columba palumbus (Common Wood-pigeon), Falco tinnunculus (Common Kestrel), Fringilla montifringilla (Brambling), Fringilla sp. (Chaffinch), Gallinula chloropus (Common Moorhen), Larus sp. (Gull), Motacilla alba (White Wagtail), Picus viridis (Eurasian Green Woodpecker), Serinus serinus (possibly, the European Serin, S.Serinus), Troglodytes troglodytes (Winter Wren), Turdus merula (Eurasian Blackbird) and Vanellus vanellus (Northern Lapwing)
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Salida de campo a Zaratán (Valladolid), probablemente el 7 de enero de 1953
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Salida de campo a Zaratán (Valladolid), probablemente el 7 de enero de 1953, de la que se anotaron observaciones sobre Lepus sp. (Liebre) y las siguientes aves: Alondra (probablemente, Alauda arvensis, la Alondra común), Athene noctua (Mochuelo europeo), Buteo Buteo (Busardo ratonero, también llamado Águila ratera), Carduelis cannabina (Pardillo común, llamada Colorín y Acanthis cannabina por el autor), Carduelis chloris (Verderón común, llamado Chloris chloris por el autor), Carduelis sp. (seguramente, el Jilguero, C.carduelis), Columba domestica (Paloma doméstica), Corvus corone (Corneja negra), Corvus frugilegus (Graja), Emberiza cirlus (Escribano soteño), Falco tinnunculus (Cernícalo vulgar), Fringilla montifringilla (Pinzón real), Fringilla sp. (Pinzón), Galerida sp. (Cogujada), Melanocorypha calandra (Calandria), Motacilla alba (Lavandera blanca), Perdiz (Alectoris sp. o Perdix sp.), Phoenicurus ochruros (Colirrojo tizón), Pica pica (Urraca, llamada "marica" y "picarza" por el autor), Serinus serinus (Verdecillo), Sturnus sp. (Estornino) y Vanellus vanellus (Avefría europea).Field trip to Zaratán (Valladolid), possibly the 7th of January of 1953, of which there were noted observations about Lepus sp. (Hare) and the following birds: Athene noctua (Little Owl), Buteo Buteo (Common Buzzard), Carduelis cannabina (Eurasian Linnet, refered as Acanthis cannabina by the author), Carduelis chloris (European Greenfinch, refered as Chloris chloris by the author), Carduelis sp. (probably, the European Goldfinch, C.carduelis), Columba domestica (Domestic Pigeon), Corvus corone (Carrion Crow), Corvus frugilegus (Rook), Emberiza cirlus (Cirl Bunting), Falco tinnunculus (Common Kestrel), Fringilla montifringilla (Brambling), Fringilla sp. (Chaffinch), Galerida sp. (Lark), Melanocorypha calandra (Calandria Lark), Motacilla alba (White Wagtail), Partridge (Alectoris sp. or Perdix sp.), Phoenicurus ochruros (Black Redstart), Pica pica (Black-billed Magpie), Serinus serinus (European Serin), Sturnus sp. (Starling), Skylark (possibly, Alauda arvensis, the Eurasian Skylark) and Vanellus vanellus (Northern Lapwing)
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Salida de campo a Tudela de Duero (Valladolid) el 21 de noviembre de 1954
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Salida de campo a Tudela de Duero (Valladolid), el 21 de noviembre de 1954, de la que se anotaron observaciones sobre el mamífero Lepus sp. (Liebre), y las siguientes aves: Accipiter nisus (Gavilán común, también llamado Astur palumbarius por el autor), Buteo Buteo (Busardo ratonero, también llamado Águila ratera), Carduelis cannabina (Pardillo común, llamada Colorín y Acanthis cannabina por el autor), Burhinus oedicnemus (Alcaraván común), Buteo Buteo (Busardo ratonero, también llamado Águila ratera), Carduelis chloris (Verderón común, llamado Chloris chloris por el autor), Carduelis sp. (probablemente, el Jilguero, C.carduelis), Circus aeruginosus (Aguilucho lagunero occidental), Columba oenas (Paloma zurita), Columba palumbus (Paloma torcaz), Corvus frugilegus (Graja), Corvus monedula (Grajilla, llamada Coloeus por el autor), Emberiza cia (Escribano montesino), Falco subButeo (Alcotán), Falco tinnunculus (Cernícalo vulgar), Fringilla coelebs (Pinzón vulgar), Fringilla montifringilla (Pinzón real), Gyps fulvus (Buitre leonado), Lullula arborea (Totovía), Perdiz (Alectoris sp. o Perdix sp.), Petronia petronia (Gorrión chillón, también llamada Jiria), Saxicola torquata (Tarabilla común), Sylvia undata (Curruca rabilarga), Tetrax tetrax (Sisón común, llamado Otis tetrax por el autor), Turdus ericetorum (considerado actualmente Turdus philomelos, el Zorzal común) y Turdus iliacus (Zorzal alirrojo, llamado Malvís por el autor).Field trip to Tudela de Duero (Valladolid), the 21st of November of 1954, of which there were noted observations about the mammal Lepus sp. (Hare), and the following birds: Accipiter nisus (Eurasian Sparrowhawk, also refered as Astur palumbarius by the author), Burhinus oedicnemus (Eurasian Thick-Knee), Buteo Buteo (Common Buzzard), Carduelis cannabina (Eurasian Linnet, refered as Acanthis cannabina by the author), Carduelis chloris (European Greenfinch, refered as Chloris chloris by the author), Carduelis sp. (possibly, the European Goldfinch, C.carduelis), Circus aeruginosus (Western Marsh-Harrier), Columba oenas (Stock Pigeon), Columba palumbus (Common Wood-pigeon), Corvus frugilegus (Rook), Corvus monedula (Eurasian Jackdaw, refered as Coloeus by the author), Emberiza cia (Rock Bunting), Falco subButeo (Eurasian Hobby), Falco tinnunculus (Common Kestrel), Fringilla coelebs (Chaffinch), Fringilla montifringilla (Brambling), Gyps fulvus (Eurasian Griffon), Lullula arborea (Wood Lark), Partridge (Alectoris sp. or Perdix sp.), Petronia petronia (Rock Sparrow), Saxicola torquata (African Stonechat), Sylvia undata (Dartford Warbler), Tetrax tetrax (Little Bustard, refered as Otis tetrax by the author), Turdus ericetorum (currently considered Turdus philomelos, the Song Thrush) and Turdus iliacus (Redwing)
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Excursión desde Valladolid a Medina del Campo, pasando por Simancas, Tordesillas y Rueda, el 7 de abril de 1952
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Salida de campo desde Medina del Campo a Valladolid, pasando por Simancas, Tordesillas y Rueda, el 7 de abril de 1952, de la que se anotaron observaciones sobre insectos coleópteros, probablemente de las familias Tenebrionidae y Gryllotalpidae, y las siguientes aves: Buteo Buteo (Busardo ratonero), Ciconia ciconia (Cigüeña blanca), Columba sp. (Paloma), Corvus frugilegus (Graja), Corvus monedula (Grajilla, llamada Coloeus por el autor), Falco naumanni (Cernícalo primilla), Falco tinnunculus (Cernícalo vulgar), Galerida sp. (Cogujada), Gallinula chloropus (Gallineta común), Hirundo rustica (Golondrina común), Larus sp. (Gaviota), Milvus migrans (Milano negro), Otis tarda (Avutarda común), "Paloma torrera" (Columba sp.), Petronia petronia (Gorrión chillón), Pica pica (Urraca, llamada "marica" por el autor), Saxicola torquata (Tarabilla común), Serinus serinus (Verdecillo), Sturnus unicolor (Estornino negro) y Sturnus sp. (Estornino).Field trip from Medina del Campo to Valladolid, passing through Simancas, Tordesillas and Rueda, the 7th of April of 1952, of which there were noted observations about some coleopterous insects, belonging probably of the Tenebrionidae and Gryllotalpidae families, and the following birds: Buteo Buteo (Common Buzzard), Ciconia ciconia (White Stork), Columba sp. (Pigeon), Corvus frugilegus (Rook), Corvus monedula (Eurasian Jackdaw, refered as Coloeus by the author), Falco naumanni (Lesser Kestrel), Falco tinnunculus (Common Kestrel), Galerida sp. (Lark), Gallinula chloropus (Common Moorhen), Hirundo rustica (Barn Swallow), Larus sp. (Gull), Milvus migrans (Black Kite), Otis tarda (Great Bustard), Petronia petronia (Rock Sparrow), Pica pica (Black-billed Magpie), Saxicola torquata (African Stonechat), Serinus serinus (European Serin), Sturnus unicolor (Spotless Starling) and Sturnus sp. (Starling)
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Salida de campo a Pesqueruela (Valladolid) el 13 de diciembre de 1950
2009Co-Authors: Valverde Gómez, José AntonioAbstract:Salida de campo a Pesqueruela, localidad de Valladolid a orillas del río Pisuerga, el día 13 de diciembre de 1950, de la que se anotaron observaciones sobre las siguientes aves: Anser fabalis (Ánsar campestre), Ardea cinerea (Garza real), Buteo Buteo (Busardo ratonero), Carduelis carduelis (Jilguero), Circus sp. (Aguilucho), Columba oenas (Paloma zurita), Corvus corone (Corneja negra), Corvus frugilegus (Graja), Cyanopica cooki (Rabilargo, llamado "Charro" y C. cyana por el autor), Erithacus rubecula (Petirrojo), Falco tinnunculus (Cernícalo vulgar), Fringilla sp. (Pinzón), Gallinula chloropus (Gallineta común), Milvus sp. (Milano), Passer montanus (Gorrión molinero), Phalacrocorax carbo (Cormorán grande), Serinus serinus (Verdecillo), Sturnus unicolor (Estornino negro), Tachybaptus ruficollis (Zampullín común, llamado Podiceps ruficollis por el autor, Tyto alba (Lechuza común) y Vanellus vanellus (Avefría europea). Se incluye un secillo esquema de la ubicación geográfica.Field trip to Pesqueruela, a village of Valladolid on banks of the Pisuerga River, the 13th of December of 1950, of which there were noted observations of the following birds: Anser fabalis (Bean Goose), Ardea cinerea (Grey Heron), Buteo Buteo (Common Buzzard), Carduelis carduelis (European Goldfinch), Circus sp. (Harrier), Columba oenas (Stock Pigeon), Corvus corone (Carrion Crow), Corvus frugilegus (Rook), Cyanopica cooki (Azure-winged Magpie, refered as C. cyana by the author), Erithacus rubecula (European Robin), Falco tinnunculus (Common Kestrel), Fringilla sp. (Chaffinch), Gallinula chloropus (Common Moorhen), Milvus sp. (Kite), Passer montanus (Eurasian Tree Sparrow), Phalacrocorax carbo (Great Cormorant), Serinus serinus (European Serin), Sturnus unicolor (Spotless Starling), Tachybaptus ruficollis (Little Greebe, refered as Pocideps ruficollis by the author), Tyto alba (Barn Owl) and Vanellus vanellus (Northern Lapwing). A simple diagram about the geographic location is included
Sean S. Walls - One of the best experts on this subject based on the ideXlab platform.
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movements of radio tagged buzzards Buteo Buteo in early life
Ibis, 2008Co-Authors: Sean S. Walls, Robert E. KenwardAbstract:Radio-tags were used to track 146 Buzzards Buteo Buteo during 1990-1996. Each bird was tracked for up to 4 years; of 74 tags fitted since 1992, 72% lasted 3 years. Among the 87 Buzzards tracked for more than one year, 46% settled after one dispersal movement, 37% dispersed and then changed their ranges, 17% did not disperse and one Buzzard alternated between a summer and a winter range. Natal dispersal occurred in two waves, one in the first autumn and the second in the following spring. Initial dispersal distances in the autumn were significantly greater than those in the spring. For 73 Buzzards that dispersed in their first autumn, 96% settled within 100 km of their nest, and their distances were similar to 76 ringing recoveries. After their second spring, Buzzards rarely changed ranges and were significantly more often to the east than the west, especially those that had dispersed more than 20 km. Buzzards that had dispersed furthest were most likely to be detected returning towards their natal area in spring, and returned earlier as they got older. However, none were detected returning once they had started to breed. Nine early breeders were significantly farther from their natal nests than 44 non-breeders.
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Movements of radio‐tagged Buzzards Buteo Buteo in early life
Ibis, 2008Co-Authors: Sean S. Walls, Robert E. KenwardAbstract:Radio-tags were used to track 146 Buzzards Buteo Buteo during 1990-1996. Each bird was tracked for up to 4 years; of 74 tags fitted since 1992, 72% lasted 3 years. Among the 87 Buzzards tracked for more than one year, 46% settled after one dispersal movement, 37% dispersed and then changed their ranges, 17% did not disperse and one Buzzard alternated between a summer and a winter range. Natal dispersal occurred in two waves, one in the first autumn and the second in the following spring. Initial dispersal distances in the autumn were significantly greater than those in the spring. For 73 Buzzards that dispersed in their first autumn, 96% settled within 100 km of their nest, and their distances were similar to 76 ringing recoveries. After their second spring, Buzzards rarely changed ranges and were significantly more often to the east than the west, especially those that had dispersed more than 20 km. Buzzards that had dispersed furthest were most likely to be detected returning towards their natal area in spring, and returned earlier as they got older. However, none were detected returning once they had started to breed. Nine early breeders were significantly farther from their natal nests than 44 non-breeders.
