Feeding Ecology of Four Sympatric Owls

Marti, Carl D.

doi:10.2307/1365983

Cited by 155 publications

(134 citation statements)

References 38 publications

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“…Barn Owls generally seek prey while flying (active search) although they occasionally make use of perches (Bunn et al 1982, Jaksic and Carothers 1985, Taylor 1994. In contrast, ground-foraging and the use of perches are strategies employed by Burrowing Owls, indicating that this owl is predominantly a sit-and-wait predator (Thomsen 1971, Marti 1974, Jaksic and Carothers 1985. Further, Burrowing Owls are diurnal/crepuscular, (Thomsen 1971, Martin 1973, whereas Barn Owls are primarily nocturnal (Bunn et al 1982).…”

Section: Selecció N De Pequeñ Os Mamíferos Como Presas Por Parte De Dmentioning

confidence: 96%

“…In general, Barn Owls and Burrowing Owls tend to forage in open areas (Marti 1974, Fast and Ambrose 1976, Bellocq 1987, Tiranti 1992. Barn Owls generally seek prey while flying (active search) although they occasionally make use of perches (Bunn et al 1982, Jaksic and Carothers 1985, Taylor 1994.…”

Section: Selecció N De Pequeñ Os Mamíferos Como Presas Por Parte De Dmentioning

confidence: 99%

“…Further, Burrowing Owls are diurnal/crepuscular, (Thomsen 1971, Martin 1973, whereas Barn Owls are primarily nocturnal (Bunn et al 1982). Although both owls use vision to hunt, Barn Owls are capable of seeing at lower light intensity than Burrowing Owls (Marti 1974).…”

Section: Selecció N De Pequeñ Os Mamíferos Como Presas Por Parte De Dmentioning

confidence: 99%

See 2 more Smart Citations

Small Mammal Prey Selection by Two Owl Species in Southeastern Brazil

Bueno

Motta-Junior

2008

Journal of Raptor Research

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Section: Selecció N De Pequeñ Os Mamíferos Como Presas Por Parte De Dmentioning

confidence: 96%

Section: Selecció N De Pequeñ Os Mamíferos Como Presas Por Parte De Dmentioning

confidence: 99%

See 1 more Smart Citation

Small Mammal Prey Selection by Two Owl Species in Southeastern Brazil

Bueno

Motta-Junior

2008

Journal of Raptor Research

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“…They hunt mostly at night, one hour after sunset to about one hour before sunrise, at low altitudes (1.5-4.5 m) above the ground in open habitats, and sometimes hunt from perches. Prey is detected by both excellent low-light vision (Dice, 1945;Marti, 1974) and hearing (Payne, 1971;Konishi, 1973). Adaptations of owl eyes to nocturnal environments include large tubular eyes with large pupils and highly curved corneas and lenses (Martin, Gordon, and Cadle, 1975).…”

Section: Owlsmentioning

confidence: 99%

Spatial contrast sensitivity of birds

2006

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Contrast sensitivity (CS) is the ability of the observer to discriminate between adjacent stimuli on the basis of their differences in relative luminosity (contrast) rather than their absolute luminances. Prior to this study, birds had been thought to have low contrast detection thresholds relative to mammals and fishes. This was a surprising phenomenon because birds had been traditionally attributed with superior vision. In addition, the low CS of birds could not be explained by retinal or optical factors, or secondary stimulus characteristics. Unfortunately, avian contrast sensitivity functions (CSFs) were sparse in the literature, so it was unknown whether low contrast sensitivity was a general phenomenon in birds. This study measured CS in six species of birds The quail and pigeon data obtained in this experiment fit well with existing CS data for these species. The kestrel data were not similar to kestrel data in the literature; however the data in the literature were collected from a single subject. All of the birds studied had contrast sensitivities that were consistent with their retinal or optical morphologies relative to other birds (in species for which such data exists) and seem well suited for their natural environments. In addition, all of these birds exhibited low CS relative to humans and most mammals, which suggests that low CS is a general phenomenon of birds.Explanations for this avian low CS phenomenon include a possible trade-off between contrast mechanisms and UV mechanisms in cone systems, and lateral inhibitory mechanisms that are perhaps categorically different from mammals. Lateral inhibition affects contrast gain, and has been shown to differ according to ganglion cell types, which in turn will differ in vertebrate species.

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“…En cuanto a las recién regurgitadas que contienen restos de micromamíferos y aves, tienden a ser de color gris oscuro cambiando a gris claro cuando se secan (Hernández, 2009). Martí, 1981;Torres-Contreras et al, 1994;Zunino & Jofré, 1999;Carevic, 2011), Brasil (Soares et al, 1992;Vieira & Teixeira, 1996;Motta-Junior, 2006), Argentina (Bellocq, 1988a;Massoia et al, 1988;Andrade et al, 2004b;Solaro et al, 2012), Perú (Medina et al, 2013) y Ecuador (Cadena et al, 2016); resultados similares se han registrado en Norteamérica (Martí, 1974;Green et al, 1993;Haug et al, 1993;York et al, 2002;Moulton et al, 2005;Valdéz-Gómez & Enríquez-Rocha, 2005). Sin embargo, en algunas regiones de Argentina, Pefaur et al (1977), Bellocq (1987) (Martí, 1974;Green et al, 1993;Moulton et al, 2005); sin embargo, el hecho de que, en nuestro estudio, el número de individuos disminuyera marcadamente con la llegada de la sequía, pudiera deberse al declive que experimentan las poblaciones de artrópodos en los ecosistemas xerófilos de la península de Araya en este período (Poulin et al 1994a,b).…”

Section: Composición De La Dietaunclassified

VARIACIÓN ESTACIONAL DE LA DIETA DEL MOCHUELO DE HOYO (Athene cunicularia) EN UN HÁBITAT XEROFÍTICO DEL NORESTE DE VENEZUELA

Roque-Vásquez¹,

Muñoz-Gil²,

Marín-Espinoza³

et al. 2017

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Feeding Ecology of Four Sympatric Owls

Cited by 155 publications

References 38 publications

Small Mammal Prey Selection by Two Owl Species in Southeastern Brazil

Small Mammal Prey Selection by Two Owl Species in Southeastern Brazil

Spatial contrast sensitivity of birds

VARIACIÓN ESTACIONAL DE LA DIETA DEL MOCHUELO DE HOYO (Athene cunicularia) EN UN HÁBITAT XEROFÍTICO DEL NORESTE DE VENEZUELA

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