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Showing 1 to 15 of 15 for “"Herons"”.
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Growth and energy requirements of captive Great Blue Herons (Ardea Herodias)
The energy requirements of Great Blue Herons (Ardea herodias) during critical stages of their life-history when food is considered limiting were investigated. The metabolizable energy coefficients (MEC) of herring (Clupea harengus), mackerel (Scomber scombrus) and trout (Oncorhynchus mykiss) when …
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Foraging Behavior and Success of Herons and Egrets in Natural and Artificial Wetlands
… Therefore, I quantified the foraging behavior of herons and egrets (species that are dependent on wetlands for food) in natural and artificial wetlands in southeastern coastal Georgia and southern coastal South Carolina. I tested the hypothesis that wading birds would show similar foraging …
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Great Blue Heron Nesting Biology and Habitat Use On the James River in South Dakota
… site activities, and habitat use of great blue herons (Ardea herodias) nesting in the Glendale heronry, South Dakota, were investigated in 1980 and 1981. Mean brood size was 3.35 nestlings. The predicted number of feeding trips of adult birds peaked when nestlings were 29 days old. A significant …
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Guano Rain and Growing Pain: Co-Nesting Dynamics of Double-Crested Cormorants and Black-Crowned Night-Herons at Tommy Thompson Park
… (Nannopterum auritum) and black-crowned night-herons (Nycticorax nycticorax) in Tommy Thompson Park, Toronto, Canada, from 1992 to 2023. Linear mixed models with Bayesian inference were used to examine the impacts of cormorant abundance, nest density, management practices, and environmental …
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Nesting and Boat Disturbance Studies of Colonial Birds in the Okavango Delta, Botswana
… height of 1 . 74 m (n = 67), followed by purple herons and darters at 2. 1 7 m (n = 3 5) and 2.74 m (n = 1 0) respectively. The number of eggs and nestlings were recorded during each nest visit. I used a modified Mayfield method (Mayfield 1 975, Johnson 1 979) for estimating survival of nests. …
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Bird Use of Cumberland Island's Freshwater Wetlands
… the North Swamp Fields. Wood Storks, Great Blue Herons, Great Egrets, Snowy Egrets and Blackcrowned Night Herons were the species most frequently seen on the island. Rainfall was 24.7 cm below the 100 year average during the study, making water presence a determining factor in bird abundance. …
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This Art Is For The Birds
… birds. Typically, the birds are modeled after herons, peacocks, woodpeckers, and roadrunners. I am interested in the curvilinear forms or colorful plumage of these birds. Why birds? I wonder that myself. The rational part of me wants to know why I use bird imagery, while the intuitive side of …
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Effects of Avian Predators on Stream Fish Assemblages
… foraging behavior of kingfishers and great blue herons, and shows that netting and perches can be used to successfully manipulate avian predation pressure. The third chapter uses this technique to examine what effects kingfishers and wading birds are having on stream fish assemblages, and shows …
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Observations on the Life History of the Bayou Killifish, <i>Fundulus pulvereus</i> (Everman 1899) in Mississippi Tidal Marshes
… for piscivorous predators such as alligators, herons and raccoons. Analysis using the Gonadosomatic Index indicated a spawning season that began in February and extended through August. The information provided here should give a greater understanding of the function of fundulids within the …
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An Examination of Gene Flow Among Distinct Management Units of The Reddish Egret
… (Egretta rufescens) is one of the least studied herons in North America. It ranges from Baja California to the Bahamas, north to Texas and Louisiana and southwards to Central America and the northern part of South America. I examined gene flow and genetic diversity among populations across the …
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Life history of a native emydid turtle (Malaclemys terrapin centrata) on the remote oceanic islands of Bermuda
… habitats for hatchlings. Yellow-crowned night herons (Nyctanassa violacea) were found to be significant predators of small terrapins during spring emergence. Small aquatic gastropods comprised 66.7% of the faecal samples analysed from the Bermudian population. Scavenged fish and vertebrate …
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Molecular Genetic Assessment of Population Structure, Paternity, and Sex Ratios for the Reddish Egret
We examined distantly isolated colonies of Reddish Egret to determine global population genetic structure. We analyzed 13 polymorphic satellites and used nine of them to accomplish seven goals: 1) to assess range wide population differentiation among Reddish Egret (Egretta rufescens) populations, …
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Ecologie et connaissances ethnozoologiques de quelques espèces d'oiseaux gibiers menaces des ecosytèmes du Sud du Bénin
The natural areas of the south of Benin under subequatorial climate are diversified in resident birds’ species as well as migratory one. Some of them are hunted for food and therapeutic purposes by grassroots communities. The most used are Guttera pucherani, Dendrocygna viduata, Egretta alba, …