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Tag: all of Ardea

Natural Infection of a Great Egret (Casmerodius albus) with Eastern Equine Encephalitis Virus

Great Egret (Casmerodius albus) Science Article 1 abstract In July 2001, a great egret (Casmerodius albus) was found dead in CharltonCounty, Georgia (USA) and submitted to the Southeastern Cooperative Wildlife Disease Study Nicole L. Gottdenker et al, Journal of Wildlife Diseases, 39(3), 2003, pp. 702-706 Download article download full text (pdf)

Water depth selection during foraging and efficiency in prey captureby the egrets Casmerodius albus and Egretta thula (Aves, Ardeidae)in an urban lagoon in Rio de Janeiro State, Brazil

Great Egret (Casmerodius albus) Science Article 2 abstract This study aimed to evaluate the water depth selection during foraging, the efficiency in prey capture, and the food items captured by Casmerodius albus (Linnaeus, 1758) and Egretta thula (Molina, 1782). The work was conducted at an urban lagoon, Lagoa Rodrigo de Freitas, Rio de Janeiro Aline […]

Behaviours influencing the distribution of great blue herons (ardea herodias fannini) in the strait of Georgia, British Columbia

Great Blue Heron (Ardea herodias) Science Article 14 abstract The Great Blue Heron (Ardea herodias fannini), a nonmigratory subspecies endemic to the Pacific Northwest of North America, is COSEWIC-listed in Canada as a species of ‘special concern’. The Breeding Bird Survey (BBS), conducted since 1969, indicate an ongoing decline in numbers. Recent findings show that […]

Fish profitability for breeding Purple Herons

Purple Heron (Ardea purpurea) Science Article 1 abstract […]. During the breeding season, the Purple Heron Ardea purpurea is a central place forager and periodically visits the nest with the food necessary for nestling development. The tradeoffs between the costs (mostly energy used in travelling and foraging) and benefits (food) of foraging, should allow the […]

Fluctuation in population size and colony dynamics in the Purple Heron Ardea purpurea in Mediterranean France

Purple Heron (Ardea purpurea) Science Article 2 abstract The breeding population of Purple Heron Ardea purpurea in Mediterranean France showed a general decline since 1982 with a further reduction in number of breeding pairs in the early 1990s that has been reversed since 1995. In addition to this general decline, the population showed large annual […]

Extra-pair copulations of Grey Herons nesting at high densities

Grey Heron (Ardea cinerea) Science Article 2 abstract The copulatory behaviour of Grey Heron Ardea cinerea was observed in a colony in Donana (SW Spain) during two years. A total of 262 pair copulation attempts (PCAs) and 39 extra-pair copulation attempts (EPCAs) (12.9% of all copulation attempts) were observed among 31 focal pairs. 84% of […]

Factors affecting the breeding success of the grey heron ( Ardea cinerea)in northern Poland

Grey Heron (Ardea cinerea) Science Article 1 abstract The aim of this study was to estimate the importance of factors a.ecting the breeding success of the grey heron (Ardea cinerea) in three colonies in the northern Poland (Mosty and Ryback), differentiated in population size, habitat type and feeding areas used by birds. The highest mean […]

Nest Site Characteristics of Great Blue Herons (Ardea herodias) inNortheast Ohio

Great Blue Heron (Ardea herodias) Science Article 1 abstract Seventeen Great Blue Heronries were surveyed in nine counties of northeast Ohio during the1993 breeding season to determine nest site characteristics. Herons nested in 15 species of deciduoustrees, selecting the taller trees at each site. Crown integrity was not a requisite for tree usage; repaired(reoccupied) nests […]

Nest Site Characteristics of Great Blue Herons (Ardea herodias) inNortheast Ohio

Great Blue Heron (Ardea herodias) Science Article 1 abstract Seventeen Great Blue Heronries were surveyed in nine counties of northeast Ohio during the1993 breeding season to determine nest site characteristics. Herons nested in 15 species of deciduoustrees, selecting the taller trees at each site. Crown integrity was not a requisite for tree usage; repaired(reoccupied) nests […]

Predation of Eared Grebe by Great Blue Heron

Great Blue Heron (Ardea herodias) Science Article 10 abstract Great Blue Herons (Ardea herodias)typically prey upon fish and other aquatic organisms,and they occasionally take small mammals and birds.We observed a Great Blue Heron attack, kill, and attemptto consume an Eared Grebe (Podiceps nigricollis).The heron was unable to swallow the grebe, andit abandoned the carcass after […]

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