Assessing Raptor Diet: Comparing Pellets, Prey Remains, and Observational Data at Hen Harrier Nests1

Redpath, Stephen M.; Clarke, Roger; Madders, Mike; Thirgood, Simon

doi:10.1650/0010-5422(2001)103[0184:ardcpp]2.0.co;2

Cited by 96 publications

(27 citation statements)

References 10 publications

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“…Otherwise, determination at species level was possible. The number of individuals contained in each pellet was calculated accordingly to Redpath et al (2001). The biomass of each species was estimated accordingly to Van Den Brink (1969).…”

Section: Dietmentioning

confidence: 99%

Habitat utilization and prey selection of the kestrelFalco tinnunculusin relation to small mammal abundance

Casagrande

Nieder

Minin

et al. 2008

Italian Journal of Zoology

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The study examined habitat utilization and prey selection by the kestrel Falco tinnunculus in an area of cultivated farmland in Italy, along with field estimates of small mammal abundance. Kestrel males were radiotagged and ranging behaviour and diet were recorded. Kestrels actively selected grasslands both during flight and perching hunting, and most predations were registered in this habitat. The occurrence of small mammals in the diet was significantly different from what was estimated from trapping, indicating that kestrels behaved as selective predators, since microtines were eaten in a greater proportion than their abundance. Microtus savii was preferred more than the common vole Microtus arvalis, whereas soricids were negatively selected. Nevertheless, common voles represented the main component of the kestrels' food niche. Reproductive success was correlated with small mammal availability. This study revealed that the high density of kestrels within the study area is supported by steady grassland management.

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Section: Dietmentioning

confidence: 99%

Habitat utilization and prey selection of the kestrelFalco tinnunculusin relation to small mammal abundance

Casagrande

Nieder

Minin

et al. 2008

Italian Journal of Zoology

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“…En aves rapaces, la dieta es usualmente estudiada por la identifi cación de restos no consumidos de presas o del análisis de las egagrópilas o regúrgitos (Redpath et al, 2001). Para determinar la composición de la dieta del H. harpyja en la zona de estudio, se colectaron los restos de las presas consumidas que se acumularon debajo y alrededor de los árboles que soportan al nido, debajo de las ramas utilizadas como perchas de alimentación (utilizadas por individuos adultos y juveniles) y dentro de los nidos abandonados.…”

Section: Composición De La Dietaunclassified

Anidamientoydieta de Harpia harpyja Linnaeus en la Comunidad Nativa de Infierno, Madre de Dios, Perú

Piana

2007

Rev peru biol

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El Águila Arpía (Harpia harpyja Linnaeus) es la rapaz de mayor tamaño que habita los bosques amazónicos, sin embargo en el Perú, es muy poco lo que se sabe de esta especie. Desde 1996 a 2001, realizó una investigación en la Comunidad Nativa de Infi erno para obtener información sobre la biología de la especie mediante la localización y observación de nidos activos y abandonados. La investigación permitió encontrar los primeros nidos activos descritos para el Águila Arpía en Perú e indicarían una cierta preferencia para anidar en castañales. Así mismo, la información recogida ha permitido establecer que el área de anidamiento de una pareja de Águilas Arpía en la zona de estudio es de aproximadamente 4300 hectáreas. El análisis de los restos de las presas consumidas y de las egagrópilas recolectadas dentro y alrededor de la base de los nidos nos han permitido hacer una primera descripción de la dieta de la especie, la cual está compuesta principalmente por mamíferos arbóreos.

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“…Although birds, reptiles, insects, and even plants have been reported as common prey of the Barn Owl (Alvarez-Castañeda et al 2004, Aliaga-Rossel & Tarifa 2005, in this study they were missing, with the exception of the remains of 1 bird, illustrating a known bias: pellets over-represent mammalian prey and underrepresent avian prey (Redpath et al 2001). A probable explanation may be the high abundance of hispid cotton rat.…”

Section: Discussionmentioning

confidence: 58%

Mammalian Prey of Barn Owl (Tyto Alba) in Southeastern Oaxaca, México

Santos‐Moreno

Maria

Espinosa

2009

AZM

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ABSTRACT. The analysis of pellet contents of Barn Owls from southeastern Oaxaca, Mexico, shows that mammals represent the main prey of this bird. We identified a minimum of 184 individuals from 2 orders, 3 families and 8 species of mammals. The greatest number of prey was from hispid cotton rat (Sigmodon hispidus), which represented 83.69% of the total individuals and 84.68% of the biomass of the sample. From the other 7 species included in the pellets, 3 were very uncommon species: the cozumelan golden bat (Mimon cozumelae), the false vampire bat (Vampyrum spectrum), and the Peter's climbing rat (Tylomys nudicaudus). Bats represented 2.17% of prey number and 0.799% of the total biomass estimated in the sample. Comparisons of these results with the estimated abundances by standard trapping methods show differences. These results corroborate a general pattern of barn owl opportunistic predation over the locally most abundant species and bats as rare prey. Key words: Diet, Owl pellets, predation, small mammals, Tylomys nudicaudus. RESUMEN. Se analizó el contenido de regurgitaciones de una lechuza de campanario del sureste del estado de Oaxaca México. Se encontró que los mamíferos representan la presa principal de esta ave. Se identificaron restos de 184 individuos pertenecientes a dos órdenes, tres familias y ocho especies. La mayor cantidad de restos correspondieron a la rata de los cañaverales (Sigmodon hispidus), que representó el 83.69% de individuos y 84.68% de la biomasa contenidos en la muestra. De las otras siete especies, tres son raras: los murciélagos Mimon cozumelae y Vampyrum spectrum y la rata arborícola Tylomys nudicaudus. Los murciélagos representaron el 2.17% de las presas y el 0.799% de la biomasa total estimada en la muestra. Los resultados corroboran un patrón general de depredación oportunista sobre las especies localmente más abundantes. Santos

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Assessing Raptor Diet: Comparing Pellets, Prey Remains, and Observational Data at Hen Harrier Nests1

Cited by 96 publications

References 10 publications

Habitat utilization and prey selection of the kestrelFalco tinnunculusin relation to small mammal abundance

Habitat utilization and prey selection of the kestrelFalco tinnunculusin relation to small mammal abundance

Anidamientoydieta de Harpia harpyja Linnaeus en la Comunidad Nativa de Infierno, Madre de Dios, Perú

Mammalian Prey of Barn Owl (Tyto Alba) in Southeastern Oaxaca, México

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