OBSERVATIONS ON NOCTURNAL FEEDING BY NIGHT HERONS <i>NYCTICORAX NYCTICORAX</i>

Watmough, B. R.

doi:10.1111/j.1474-919x.1978.tb06800.x

Cited by 21 publications

(8 citation statements)

References 3 publications

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“…In relation to the circadian rhythm of food, our results reinforce the already described nocturnal feeding habits of the Black-crowned Night-herons (Hanzak 1970, Voisin 1970, Whatmough 1978, Fasola 1984, Peterson and Chalif 1989. Unlike the previously mentioned reports on N. nycticorax's feeding behavior, we added to the available observational information a new index of data that supports this nocturnal behavior.…”

Section: Introductionsupporting

confidence: 78%

Diet of Black-crowned Night-herons (Nycticorax nycticorax) in a Wetland of the Parana River´s Alluvial Valley

Quiroga

Leon

Beltzer

et al. 2013

Ekoloji

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We analysed the feeding ecology of Nycticorax nycticorax based on fourty individuals captured on the Carabajal Island (Santa Fe, 31º39'S, 60º42'W), determining the minimum sample, index of relative importance (IRI), size of prey, feeding efficiency, dietary selectivity, amplitude of the trophic niche, circadian rhythm of feeding activity, and habitat preference. The trophic spectrum was made up of 16 taxonomic entities, mainly fishes (IRI= 9.100), followed by insects (IRI= 1.650), and crustaceans (IRI= 600). The highest percentage of prey size was found in the range of 61-80 mm. The amplitude of the trophic niche ranged between 2.55 and 5.22, and the feeding efficiency between 92.3% and 99%. In relation to dietary selectivity, the correlation between abundance of prey in stomachs and abundance of prey in the study area yielded significant results (r = 0.41, P > 0.001). The rhythm of feeding activity showed high activity very early in the morning, decreasing towards noon, and increasing again at dusk. Grasslands and Aquatic vegetation were units of vegetation and environment selected more frequently.

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Section: Introductionsupporting

confidence: 78%

Diet of Black-crowned Night-herons (Nycticorax nycticorax) in a Wetland of the Parana River´s Alluvial Valley

Quiroga

Leon

Beltzer

et al. 2013

Ekoloji

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“…However, we found that failed nests were more closely associated with lower INC at night. Night‐Herons are primarily nocturnal or crepuscular foragers (Watmough ), but during the breeding season they have been found to shift their time budgets, sometimes becoming active over the entire 24‐h day (Fasola ). In fact, in a concurrent study of time budgets of Night‐Herons on Alcatraz, we found that, generally, Night‐Herons were most active during the early‐ and mid‐light periods, and were inactive during the night (Coates et al .…”

Section: Discussionmentioning

confidence: 99%

Nest survival is influenced by parental behaviour and heterospecifics in a mixed‐species colony

Brussee

Coates

Hothem

et al. 2016

Ibis

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Studies of avian nest success often focus on examining influences of variation in environmental and seasonal factors. However, in-depth evaluations can also incorporate variation in individual incubation behaviour to further advance our understanding of avian reproductive ecology. We examined these relationships in colonially nesting Black-crowned Night-Herons Nycticorax nycticorax using intensive video-monitoring methods to quantify incubation behaviours. We modelled nest survival as a function of both extrinsic factors and incubation behaviours over a 3-year period (2010-12) on Alcatraz Island, USA. Model-averaged parameter estimates indicated that nest survival increased as a function of greater incubation constancy (% of time spent incubating eggs within a 24-h period), and average daily precipitation throughout the nesting stage. Common Ravens Corvus corax are the only known nest predator of Night-Herons on Alcatraz Island, as on many other coastal Pacific islands. We also investigated the effects of heterospecific nesting of California Gulls Larus californicus and Western Gulls Larus occidentalis in a mixed-species colony with Night-Herons, based on nesting proximity data collected over a 2-year period . This second analysis indicated that, in addition to incubation behaviours, nesting heterospecifics are an important factor for explaining variation in NightHeron nest survival. However, contrary to our original expectation, we found that Night-Herons experienced increased nest survival with increasing distance from gull colony boundaries. These results may apply to other areas with multiple colonial nesting species and similar predator communities and climatic patterns.

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“…However, this needs further investigation. Many hypotheses (Kushlan 1976a(Kushlan , 1978Watmough 1978;Fasola 1984) highlight why certain wading birds prefer to feed using a tactile technique.…”

Section: Discussionmentioning

confidence: 99%

Foraging technique and prey‐handling time in black‐necked stork (Ephippiorhynchus asiaticus)

Maheswaran

Rahmani

2008

Integrative Zoology

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The foraging technique and prey-handling time of the black-necked stork (Ephippiorhynchus asiaticus) was studied in Dudhwa National Park, India, from January 1996 to June 1997. The habitat in which the storks foraged played an important role in selecting a particular technique to procure food. Black-necked storks mostly foraged using a tactile technique (>90%), but sometimes foraged visually. When the water level was estimated to be less than 60 cm, the storks foraged using tactile techniques. There was no difference in the feeding techniques of male and female storks. Foraging attempt rates varied between the sexes in summer (May) and during late winter (February) in 1997. The search time for prey increased when the water level was high and fish were widely distributed. Decreases in water level resulted in concentration of fish in certain areas and this contributed to high fish-catching rates by black-necked storks. Males had a higher success rate of fish capture than females. However, females captured longer fish than males. Prey-handling time increased in both sexes as fish length increased. Fish 4-6 cm long were most frequently taken by the foraging storks.

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OBSERVATIONS ON NOCTURNAL FEEDING BY NIGHT HERONS NYCTICORAX NYCTICORAX

Cited by 21 publications

References 3 publications

Diet of Black-crowned Night-herons (Nycticorax nycticorax) in a Wetland of the Parana River´s Alluvial Valley

Diet of Black-crowned Night-herons (Nycticorax nycticorax) in a Wetland of the Parana River´s Alluvial Valley

Nest survival is influenced by parental behaviour and heterospecifics in a mixed‐species colony

Foraging technique and prey‐handling time in black‐necked stork (Ephippiorhynchus asiaticus)

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